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WordPress/wp-includes/post-template.php

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<?php
/**
* WordPress Post Template Functions.
*
* Gets content for the current post in the loop.
*
* @package WordPress
* @subpackage Template
*/
/**
* Display the ID of the current item in the WordPress Loop.
*
* @since 0.71
*/
function the_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
echo get_the_ID();
}
/**
* Retrieve the ID of the current item in the WordPress Loop.
*
* @since 2.1.0
*
* @return int|false The ID of the current item in the WordPress Loop. False if $post is not set.
*/
function get_the_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
$post = get_post();
return ! empty( $post ) ? $post->ID : false;
}
/**
* Display or retrieve the current post title with optional markup.
*
* @since 0.71
*
* @param string $before Optional. Markup to prepend to the title. Default empty.
* @param string $after Optional. Markup to append to the title. Default empty.
* @param bool $echo Optional. Whether to echo or return the title. Default true for echo.
* @return void|string Void if `$echo` argument is true, current post title if `$echo` is false.
*/
function the_title( $before = '', $after = '', $echo = true ) {
$title = get_the_title();
if ( strlen( $title ) == 0 ) {
return;
}
$title = $before . $title . $after;
if ( $echo ) {
echo $title;
} else {
return $title;
}
}
/**
* Sanitize the current title when retrieving or displaying.
*
* Works like the_title(), except the parameters can be in a string or
* an array. See the function for what can be override in the $args parameter.
*
* The title before it is displayed will have the tags stripped and esc_attr()
* before it is passed to the user or displayed. The default as with the_title(),
* is to display the title.
*
* @since 2.3.0
*
* @param string|array $args {
* Title attribute arguments. Optional.
*
* @type string $before Markup to prepend to the title. Default empty.
* @type string $after Markup to append to the title. Default empty.
* @type bool $echo Whether to echo or return the title. Default true for echo.
* @type WP_Post $post Current post object to retrieve the title for.
* }
* @return void|string Void if 'echo' argument is true, the title attribute if 'echo' is false.
*/
function the_title_attribute( $args = '' ) {
$defaults = array(
'before' => '',
'after' => '',
'echo' => true,
'post' => get_post(),
);
$parsed_args = wp_parse_args( $args, $defaults );
$title = get_the_title( $parsed_args['post'] );
if ( strlen( $title ) == 0 ) {
return;
}
$title = $parsed_args['before'] . $title . $parsed_args['after'];
$title = esc_attr( strip_tags( $title ) );
if ( $parsed_args['echo'] ) {
echo $title;
} else {
return $title;
}
}
/**
* Retrieve post title.
*
* If the post is protected and the visitor is not an admin, then "Protected"
* will be displayed before the post title. If the post is private, then
* "Private" will be located before the post title.
*
* @since 0.71
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
* @return string
*/
function get_the_title( $post = 0 ) {
$post = get_post( $post );
$title = isset( $post->post_title ) ? $post->post_title : '';
$id = isset( $post->ID ) ? $post->ID : 0;
if ( ! is_admin() ) {
if ( ! empty( $post->post_password ) ) {
/* translators: %s: Protected post title. */
$prepend = __( 'Protected: %s' );
/**
* Filters the text prepended to the post title for protected posts.
*
* The filter is only applied on the front end.
*
* @since 2.8.0
*
* @param string $prepend Text displayed before the post title.
* Default 'Protected: %s'.
* @param WP_Post $post Current post object.
*/
$protected_title_format = apply_filters( 'protected_title_format', $prepend, $post );
$title = sprintf( $protected_title_format, $title );
} elseif ( isset( $post->post_status ) && 'private' == $post->post_status ) {
/* translators: %s: Private post title. */
$prepend = __( 'Private: %s' );
/**
* Filters the text prepended to the post title of private posts.
*
* The filter is only applied on the front end.
*
* @since 2.8.0
*
* @param string $prepend Text displayed before the post title.
* Default 'Private: %s'.
* @param WP_Post $post Current post object.
*/
$private_title_format = apply_filters( 'private_title_format', $prepend, $post );
$title = sprintf( $private_title_format, $title );
}
}
/**
* Filters the post title.
*
* @since 0.71
*
* @param string $title The post title.
* @param int $id The post ID.
*/
return apply_filters( 'the_title', $title, $id );
}
/**
* Display the Post Global Unique Identifier (guid).
*
* The guid will appear to be a link, but should not be used as a link to the
* post. The reason you should not use it as a link, is because of moving the
* blog across domains.
*
* URL is escaped to make it XML-safe.
*
* @since 1.5.0
*
* @param int|WP_Post $post Optional. Post ID or post object. Default is global $post.
*/
function the_guid( $post = 0 ) {
$post = get_post( $post );
$guid = isset( $post->guid ) ? get_the_guid( $post ) : '';
$id = isset( $post->ID ) ? $post->ID : 0;
/**
* Filters the escaped Global Unique Identifier (guid) of the post.
*
* @since 4.2.0
*
* @see get_the_guid()
*
* @param string $guid Escaped Global Unique Identifier (guid) of the post.
* @param int $id The post ID.
*/
echo apply_filters( 'the_guid', $guid, $id );
}
/**
* Retrieve the Post Global Unique Identifier (guid).
*
* The guid will appear to be a link, but should not be used as an link to the
* post. The reason you should not use it as a link, is because of moving the
* blog across domains.
*
* @since 1.5.0
*
* @param int|WP_Post $post Optional. Post ID or post object. Default is global $post.
* @return string
*/
function get_the_guid( $post = 0 ) {
$post = get_post( $post );
$guid = isset( $post->guid ) ? $post->guid : '';
$id = isset( $post->ID ) ? $post->ID : 0;
/**
* Filters the Global Unique Identifier (guid) of the post.
*
* @since 1.5.0
*
* @param string $guid Global Unique Identifier (guid) of the post.
* @param int $id The post ID.
*/
return apply_filters( 'get_the_guid', $guid, $id );
}
/**
* Display the post content.
*
* @since 0.71
*
* @param string $more_link_text Optional. Content for when there is more text.
* @param bool $strip_teaser Optional. Strip teaser content before the more text. Default is false.
*/
function the_content( $more_link_text = null, $strip_teaser = false ) {
$content = get_the_content( $more_link_text, $strip_teaser );
/**
* Filters the post content.
*
* @since 0.71
*
* @param string $content Content of the current post.
*/
$content = apply_filters( 'the_content', $content );
$content = str_replace( ']]>', ']]&gt;', $content );
echo $content;
}
/**
* Retrieve the post content.
*
* @since 0.71
* @since 5.2.0 Added the `$post` parameter.
*
* @global int $page Page number of a single post/page.
* @global int $more Boolean indicator for whether single post/page is being viewed.
* @global bool $preview Whether post/page is in preview mode.
* @global array $pages Array of all pages in post/page. Each array element contains
* part of the content separated by the `<!--nextpage-->` tag.
* @global int $multipage Boolean indicator for whether multiple pages are in play.
*
* @param string $more_link_text Optional. Content for when there is more text.
* @param bool $strip_teaser Optional. Strip teaser content before the more text. Default is false.
* @param WP_Post|object|int $post Optional. WP_Post instance or Post ID/object. Default is null.
* @return string
*/
function get_the_content( $more_link_text = null, $strip_teaser = false, $post = null ) {
global $page, $more, $preview, $pages, $multipage;
$_post = get_post( $post );
if ( ! ( $_post instanceof WP_Post ) ) {
return '';
}
if ( null === $post ) {
$elements = compact( 'page', 'more', 'preview', 'pages', 'multipage' );
} else {
$elements = generate_postdata( $_post );
}
if ( null === $more_link_text ) {
$more_link_text = sprintf(
'<span aria-label="%1$s">%2$s</span>',
sprintf(
/* translators: %s: Post title. */
__( 'Continue reading %s' ),
the_title_attribute(
array(
'echo' => false,
'post' => $_post,
)
)
),
__( '(more&hellip;)' )
);
}
$output = '';
$has_teaser = false;
// If post password required and it doesn't match the cookie.
if ( post_password_required( $_post ) ) {
return get_the_password_form( $_post );
}
// If the requested page doesn't exist.
if ( $elements['page'] > count( $elements['pages'] ) ) {
// Give them the highest numbered page that DOES exist.
$elements['page'] = count( $elements['pages'] );
}
$page_no = $elements['page'];
$content = $elements['pages'][ $page_no - 1 ];
if ( preg_match( '/<!--more(.*?)?-->/', $content, $matches ) ) {
if ( has_block( 'more', $content ) ) {
// Remove the core/more block delimiters. They will be left over after $content is split up.
$content = preg_replace( '/<!-- \/?wp:more(.*?) -->/', '', $content );
}
$content = explode( $matches[0], $content, 2 );
if ( ! empty( $matches[1] ) && ! empty( $more_link_text ) ) {
$more_link_text = strip_tags( wp_kses_no_null( trim( $matches[1] ) ) );
}
$has_teaser = true;
} else {
$content = array( $content );
}
if ( false !== strpos( $_post->post_content, '<!--noteaser-->' ) && ( ! $elements['multipage'] || $elements['page'] == 1 ) ) {
$strip_teaser = true;
}
$teaser = $content[0];
if ( $elements['more'] && $strip_teaser && $has_teaser ) {
$teaser = '';
}
$output .= $teaser;
if ( count( $content ) > 1 ) {
if ( $elements['more'] ) {
$output .= '<span id="more-' . $_post->ID . '"></span>' . $content[1];
} else {
if ( ! empty( $more_link_text ) ) {
/**
* Filters the Read More link text.
*
* @since 2.8.0
*
* @param string $more_link_element Read More link element.
* @param string $more_link_text Read More text.
*/
$output .= apply_filters( 'the_content_more_link', ' <a href="' . get_permalink( $_post ) . "#more-{$_post->ID}\" class=\"more-link\">$more_link_text</a>", $more_link_text );
}
$output = force_balance_tags( $output );
}
}
return $output;
}
/**
* Display the post excerpt.
*
* @since 0.71
*/
function the_excerpt() {
/**
* Filters the displayed post excerpt.
*
* @since 0.71
*
* @see get_the_excerpt()
*
* @param string $post_excerpt The post excerpt.
*/
echo apply_filters( 'the_excerpt', get_the_excerpt() );
}
/**
* Retrieves the post excerpt.
*
* @since 0.71
* @since 4.5.0 Introduced the `$post` parameter.
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
* @return string Post excerpt.
*/
function get_the_excerpt( $post = null ) {
if ( is_bool( $post ) ) {
_deprecated_argument( __FUNCTION__, '2.3.0' );
}
$post = get_post( $post );
if ( empty( $post ) ) {
return '';
}
if ( post_password_required( $post ) ) {
return __( 'There is no excerpt because this is a protected post.' );
}
/**
* Filters the retrieved post excerpt.
*
* @since 1.2.0
* @since 4.5.0 Introduced the `$post` parameter.
*
* @param string $post_excerpt The post excerpt.
* @param WP_Post $post Post object.
*/
return apply_filters( 'get_the_excerpt', $post->post_excerpt, $post );
}
/**
* Determines whether the post has a custom excerpt.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 2.3.0
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
* @return bool True if the post has a custom excerpt, false otherwise.
*/
function has_excerpt( $post = 0 ) {
$post = get_post( $post );
return ( ! empty( $post->post_excerpt ) );
}
/**
* Displays the classes for the post container element.
*
* @since 2.7.0
*
* @param string|array $class One or more classes to add to the class list.
* @param int|WP_Post $post_id Optional. Post ID or post object. Defaults to the global `$post`.
*/
function post_class( $class = '', $post_id = null ) {
// Separates classes with a single space, collates classes for post DIV.
echo 'class="' . join( ' ', get_post_class( $class, $post_id ) ) . '"';
}
/**
* Retrieves an array of the class names for the post container element.
*
* The class names are many. If the post is a sticky, then the 'sticky'
* class name. The class 'hentry' is always added to each post. If the post has a
* post thumbnail, 'has-post-thumbnail' is added as a class. For each taxonomy that
* the post belongs to, a class will be added of the format '{$taxonomy}-{$slug}' -
* eg 'category-foo' or 'my_custom_taxonomy-bar'.
*
* The 'post_tag' taxonomy is a special
* case; the class has the 'tag-' prefix instead of 'post_tag-'. All class names are
* passed through the filter, {@see 'post_class'}, with the list of class names, followed by
* $class parameter value, with the post ID as the last parameter.
*
* @since 2.7.0
* @since 4.2.0 Custom taxonomy class names were added.
*
* @param string|string[] $class Space-separated string or array of class names to add to the class list.
* @param int|WP_Post $post_id Optional. Post ID or post object.
* @return string[] Array of class names.
*/
function get_post_class( $class = '', $post_id = null ) {
$post = get_post( $post_id );
$classes = array();
if ( $class ) {
if ( ! is_array( $class ) ) {
$class = preg_split( '#\s+#', $class );
}
$classes = array_map( 'esc_attr', $class );
} else {
// Ensure that we always coerce class to being an array.
$class = array();
}
if ( ! $post ) {
return $classes;
}
$classes[] = 'post-' . $post->ID;
if ( ! is_admin() ) {
$classes[] = $post->post_type;
}
$classes[] = 'type-' . $post->post_type;
$classes[] = 'status-' . $post->post_status;
// Post Format.
if ( post_type_supports( $post->post_type, 'post-formats' ) ) {
$post_format = get_post_format( $post->ID );
if ( $post_format && ! is_wp_error( $post_format ) ) {
$classes[] = 'format-' . sanitize_html_class( $post_format );
} else {
$classes[] = 'format-standard';
}
}
$post_password_required = post_password_required( $post->ID );
// Post requires password.
if ( $post_password_required ) {
$classes[] = 'post-password-required';
} elseif ( ! empty( $post->post_password ) ) {
$classes[] = 'post-password-protected';
}
// Post thumbnails.
if ( current_theme_supports( 'post-thumbnails' ) && has_post_thumbnail( $post->ID ) && ! is_attachment( $post ) && ! $post_password_required ) {
$classes[] = 'has-post-thumbnail';
}
// Sticky for Sticky Posts.
if ( is_sticky( $post->ID ) ) {
if ( is_home() && ! is_paged() ) {
$classes[] = 'sticky';
} elseif ( is_admin() ) {
$classes[] = 'status-sticky';
}
}
// hentry for hAtom compliance.
$classes[] = 'hentry';
// All public taxonomies.
$taxonomies = get_taxonomies( array( 'public' => true ) );
foreach ( (array) $taxonomies as $taxonomy ) {
if ( is_object_in_taxonomy( $post->post_type, $taxonomy ) ) {
foreach ( (array) get_the_terms( $post->ID, $taxonomy ) as $term ) {
if ( empty( $term->slug ) ) {
continue;
}
$term_class = sanitize_html_class( $term->slug, $term->term_id );
if ( is_numeric( $term_class ) || ! trim( $term_class, '-' ) ) {
$term_class = $term->term_id;
}
// 'post_tag' uses the 'tag' prefix for backward compatibility.
if ( 'post_tag' == $taxonomy ) {
$classes[] = 'tag-' . $term_class;
} else {
$classes[] = sanitize_html_class( $taxonomy . '-' . $term_class, $taxonomy . '-' . $term->term_id );
}
}
}
}
$classes = array_map( 'esc_attr', $classes );
/**
* Filters the list of CSS class names for the current post.
*
* @since 2.7.0
*
* @param string[] $classes An array of post class names.
* @param string[] $class An array of additional class names added to the post.
* @param int $post_id The post ID.
*/
$classes = apply_filters( 'post_class', $classes, $class, $post->ID );
return array_unique( $classes );
}
/**
* Displays the class names for the body element.
*
* @since 2.8.0
*
* @param string|string[] $class Space-separated string or array of class names to add to the class list.
*/
function body_class( $class = '' ) {
// Separates class names with a single space, collates class names for body element.
echo 'class="' . join( ' ', get_body_class( $class ) ) . '"';
}
/**
* Retrieves an array of the class names for the body element.
*
* @since 2.8.0
*
* @global WP_Query $wp_query WordPress Query object.
*
* @param string|string[] $class Space-separated string or array of class names to add to the class list.
* @return string[] Array of class names.
*/
function get_body_class( $class = '' ) {
global $wp_query;
$classes = array();
if ( is_rtl() ) {
$classes[] = 'rtl';
}
if ( is_front_page() ) {
$classes[] = 'home';
}
if ( is_home() ) {
$classes[] = 'blog';
}
if ( is_privacy_policy() ) {
$classes[] = 'privacy-policy';
}
if ( is_archive() ) {
$classes[] = 'archive';
}
if ( is_date() ) {
$classes[] = 'date';
}
if ( is_search() ) {
$classes[] = 'search';
$classes[] = $wp_query->posts ? 'search-results' : 'search-no-results';
}
if ( is_paged() ) {
$classes[] = 'paged';
}
if ( is_attachment() ) {
$classes[] = 'attachment';
}
if ( is_404() ) {
$classes[] = 'error404';
}
if ( is_singular() ) {
$post_id = $wp_query->get_queried_object_id();
$post = $wp_query->get_queried_object();
$post_type = $post->post_type;
if ( is_page_template() ) {
$classes[] = "{$post_type}-template";
$template_slug = get_page_template_slug( $post_id );
$template_parts = explode( '/', $template_slug );
foreach ( $template_parts as $part ) {
$classes[] = "{$post_type}-template-" . sanitize_html_class( str_replace( array( '.', '/' ), '-', basename( $part, '.php' ) ) );
}
$classes[] = "{$post_type}-template-" . sanitize_html_class( str_replace( '.', '-', $template_slug ) );
} else {
$classes[] = "{$post_type}-template-default";
}
if ( is_single() ) {
$classes[] = 'single';
if ( isset( $post->post_type ) ) {
$classes[] = 'single-' . sanitize_html_class( $post->post_type, $post_id );
$classes[] = 'postid-' . $post_id;
// Post Format.
if ( post_type_supports( $post->post_type, 'post-formats' ) ) {
$post_format = get_post_format( $post->ID );
if ( $post_format && ! is_wp_error( $post_format ) ) {
$classes[] = 'single-format-' . sanitize_html_class( $post_format );
} else {
$classes[] = 'single-format-standard';
}
}
}
}
if ( is_attachment() ) {
$mime_type = get_post_mime_type( $post_id );
$mime_prefix = array( 'application/', 'image/', 'text/', 'audio/', 'video/', 'music/' );
$classes[] = 'attachmentid-' . $post_id;
$classes[] = 'attachment-' . str_replace( $mime_prefix, '', $mime_type );
} elseif ( is_page() ) {
$classes[] = 'page';
$page_id = $wp_query->get_queried_object_id();
$post = get_post( $page_id );
$classes[] = 'page-id-' . $page_id;
if ( get_pages(
array(
'parent' => $page_id,
'number' => 1,
)
) ) {
$classes[] = 'page-parent';
}
if ( $post->post_parent ) {
$classes[] = 'page-child';
$classes[] = 'parent-pageid-' . $post->post_parent;
}
}
} elseif ( is_archive() ) {
if ( is_post_type_archive() ) {
$classes[] = 'post-type-archive';
$post_type = get_query_var( 'post_type' );
if ( is_array( $post_type ) ) {
$post_type = reset( $post_type );
}
$classes[] = 'post-type-archive-' . sanitize_html_class( $post_type );
} elseif ( is_author() ) {
$author = $wp_query->get_queried_object();
$classes[] = 'author';
if ( isset( $author->user_nicename ) ) {
$classes[] = 'author-' . sanitize_html_class( $author->user_nicename, $author->ID );
$classes[] = 'author-' . $author->ID;
}
} elseif ( is_category() ) {
$cat = $wp_query->get_queried_object();
$classes[] = 'category';
if ( isset( $cat->term_id ) ) {
$cat_class = sanitize_html_class( $cat->slug, $cat->term_id );
if ( is_numeric( $cat_class ) || ! trim( $cat_class, '-' ) ) {
$cat_class = $cat->term_id;
}
$classes[] = 'category-' . $cat_class;
$classes[] = 'category-' . $cat->term_id;
}
} elseif ( is_tag() ) {
$tag = $wp_query->get_queried_object();
$classes[] = 'tag';
if ( isset( $tag->term_id ) ) {
$tag_class = sanitize_html_class( $tag->slug, $tag->term_id );
if ( is_numeric( $tag_class ) || ! trim( $tag_class, '-' ) ) {
$tag_class = $tag->term_id;
}
$classes[] = 'tag-' . $tag_class;
$classes[] = 'tag-' . $tag->term_id;
}
} elseif ( is_tax() ) {
$term = $wp_query->get_queried_object();
if ( isset( $term->term_id ) ) {
$term_class = sanitize_html_class( $term->slug, $term->term_id );
if ( is_numeric( $term_class ) || ! trim( $term_class, '-' ) ) {
$term_class = $term->term_id;
}
$classes[] = 'tax-' . sanitize_html_class( $term->taxonomy );
$classes[] = 'term-' . $term_class;
$classes[] = 'term-' . $term->term_id;
}
}
}
if ( is_user_logged_in() ) {
$classes[] = 'logged-in';
}
if ( is_admin_bar_showing() ) {
$classes[] = 'admin-bar';
$classes[] = 'no-customize-support';
}
if ( current_theme_supports( 'custom-background' )
&& ( get_background_color() !== get_theme_support( 'custom-background', 'default-color' ) || get_background_image() ) ) {
$classes[] = 'custom-background';
}
if ( has_custom_logo() ) {
$classes[] = 'wp-custom-logo';
}
if ( current_theme_supports( 'responsive-embeds' ) ) {
$classes[] = 'wp-embed-responsive';
}
$page = $wp_query->get( 'page' );
if ( ! $page || $page < 2 ) {
$page = $wp_query->get( 'paged' );
}
if ( $page && $page > 1 && ! is_404() ) {
$classes[] = 'paged-' . $page;
if ( is_single() ) {
$classes[] = 'single-paged-' . $page;
} elseif ( is_page() ) {
$classes[] = 'page-paged-' . $page;
} elseif ( is_category() ) {
$classes[] = 'category-paged-' . $page;
} elseif ( is_tag() ) {
$classes[] = 'tag-paged-' . $page;
} elseif ( is_date() ) {
$classes[] = 'date-paged-' . $page;
} elseif ( is_author() ) {
$classes[] = 'author-paged-' . $page;
} elseif ( is_search() ) {
$classes[] = 'search-paged-' . $page;
} elseif ( is_post_type_archive() ) {
$classes[] = 'post-type-paged-' . $page;
}
}
if ( ! empty( $class ) ) {
if ( ! is_array( $class ) ) {
$class = preg_split( '#\s+#', $class );
}
$classes = array_merge( $classes, $class );
} else {
// Ensure that we always coerce class to being an array.
$class = array();
}
$classes = array_map( 'esc_attr', $classes );
/**
* Filters the list of CSS body class names for the current post or page.
*
* @since 2.8.0
*
* @param string[] $classes An array of body class names.
* @param string[] $class An array of additional class names added to the body.
*/
$classes = apply_filters( 'body_class', $classes, $class );
return array_unique( $classes );
}
/**
* Whether post requires password and correct password has been provided.
*
* @since 2.7.0
*
* @param int|WP_Post|null $post An optional post. Global $post used if not provided.
* @return bool false if a password is not required or the correct password cookie is present, true otherwise.
*/
function post_password_required( $post = null ) {
$post = get_post( $post );
if ( empty( $post->post_password ) ) {
/** This filter is documented in wp-includes/post-template.php */
return apply_filters( 'post_password_required', false, $post );
}
if ( ! isset( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] ) ) {
/** This filter is documented in wp-includes/post-template.php */
return apply_filters( 'post_password_required', true, $post );
}
require_once ABSPATH . WPINC . '/class-phpass.php';
$hasher = new PasswordHash( 8, true );
$hash = wp_unslash( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] );
if ( 0 !== strpos( $hash, '$P$B' ) ) {
$required = true;
} else {
$required = ! $hasher->CheckPassword( $post->post_password, $hash );
}
/**
* Filters whether a post requires the user to supply a password.
*
* @since 4.7.0
*
* @param bool $required Whether the user needs to supply a password. True if password has not been
* provided or is incorrect, false if password has been supplied or is not required.
* @param WP_Post $post Post data.
*/
return apply_filters( 'post_password_required', $required, $post );
}
//
// Page Template Functions for usage in Themes.
//
/**
* The formatted output of a list of pages.
*
* Displays page links for paginated posts (i.e. including the `<!--nextpage-->`
* Quicktag one or more times). This tag must be within The Loop.
*
* @since 1.2.0
* @since 5.1.0 Added the `aria_current` argument.
*
* @global int $page
* @global int $numpages
* @global int $multipage
* @global int $more
*
* @param string|array $args {
* Optional. Array or string of default arguments.
*
* @type string $before HTML or text to prepend to each link. Default is `<p> Pages:`.
* @type string $after HTML or text to append to each link. Default is `</p>`.
* @type string $link_before HTML or text to prepend to each link, inside the `<a>` tag.
* Also prepended to the current item, which is not linked. Default empty.
* @type string $link_after HTML or text to append to each Pages link inside the `<a>` tag.
* Also appended to the current item, which is not linked. Default empty.
* @type string $aria_current The value for the aria-current attribute. Possible values are 'page',
* 'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'.
* @type string $next_or_number Indicates whether page numbers should be used. Valid values are number
* and next. Default is 'number'.
* @type string $separator Text between pagination links. Default is ' '.
* @type string $nextpagelink Link text for the next page link, if available. Default is 'Next Page'.
* @type string $previouspagelink Link text for the previous page link, if available. Default is 'Previous Page'.
* @type string $pagelink Format string for page numbers. The % in the parameter string will be
* replaced with the page number, so 'Page %' generates "Page 1", "Page 2", etc.
* Defaults to '%', just the page number.
* @type int|bool $echo Whether to echo or not. Accepts 1|true or 0|false. Default 1|true.
* }
* @return string Formatted output in HTML.
*/
function wp_link_pages( $args = '' ) {
global $page, $numpages, $multipage, $more;
$defaults = array(
'before' => '<p class="post-nav-links">' . __( 'Pages:' ),
'after' => '</p>',
'link_before' => '',
'link_after' => '',
'aria_current' => 'page',
'next_or_number' => 'number',
'separator' => ' ',
'nextpagelink' => __( 'Next page' ),
'previouspagelink' => __( 'Previous page' ),
'pagelink' => '%',
'echo' => 1,
);
$parsed_args = wp_parse_args( $args, $defaults );
/**
* Filters the arguments used in retrieving page links for paginated posts.
*
* @since 3.0.0
*
* @param array $parsed_args An array of arguments for page links for paginated posts.
*/
$parsed_args = apply_filters( 'wp_link_pages_args', $parsed_args );
$output = '';
if ( $multipage ) {
if ( 'number' == $parsed_args['next_or_number'] ) {
$output .= $parsed_args['before'];
for ( $i = 1; $i <= $numpages; $i++ ) {
$link = $parsed_args['link_before'] . str_replace( '%', $i, $parsed_args['pagelink'] ) . $parsed_args['link_after'];
if ( $i != $page || ! $more && 1 == $page ) {
$link = _wp_link_page( $i ) . $link . '</a>';
} elseif ( $i === $page ) {
$link = '<span class="post-page-numbers current" aria-current="' . esc_attr( $parsed_args['aria_current'] ) . '">' . $link . '</span>';
}
/**
* Filters the HTML output of individual page number links.
*
* @since 3.6.0
*
* @param string $link The page number HTML output.
* @param int $i Page number for paginated posts' page links.
*/
$link = apply_filters( 'wp_link_pages_link', $link, $i );
// Use the custom links separator beginning with the second link.
$output .= ( 1 === $i ) ? ' ' : $parsed_args['separator'];
$output .= $link;
}
$output .= $parsed_args['after'];
} elseif ( $more ) {
$output .= $parsed_args['before'];
$prev = $page - 1;
if ( $prev > 0 ) {
$link = _wp_link_page( $prev ) . $parsed_args['link_before'] . $parsed_args['previouspagelink'] . $parsed_args['link_after'] . '</a>';
/** This filter is documented in wp-includes/post-template.php */
$output .= apply_filters( 'wp_link_pages_link', $link, $prev );
}
$next = $page + 1;
if ( $next <= $numpages ) {
if ( $prev ) {
$output .= $parsed_args['separator'];
}
$link = _wp_link_page( $next ) . $parsed_args['link_before'] . $parsed_args['nextpagelink'] . $parsed_args['link_after'] . '</a>';
/** This filter is documented in wp-includes/post-template.php */
$output .= apply_filters( 'wp_link_pages_link', $link, $next );
}
$output .= $parsed_args['after'];
}
}
/**
* Filters the HTML output of page links for paginated posts.
*
* @since 3.6.0
*
* @param string $output HTML output of paginated posts' page links.
* @param array $args An array of arguments.
*/
$html = apply_filters( 'wp_link_pages', $output, $args );
if ( $parsed_args['echo'] ) {
echo $html;
}
return $html;
}
/**
* Helper function for wp_link_pages().
*
* @since 3.1.0
* @access private
*
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @param int $i Page number.
* @return string Link.
*/
function _wp_link_page( $i ) {
global $wp_rewrite;
$post = get_post();
$query_args = array();
if ( 1 == $i ) {
$url = get_permalink();
} else {
if ( '' == get_option( 'permalink_structure' ) || in_array( $post->post_status, array( 'draft', 'pending' ) ) ) {
$url = add_query_arg( 'page', $i, get_permalink() );
} elseif ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post->ID ) {
$url = trailingslashit( get_permalink() ) . user_trailingslashit( "$wp_rewrite->pagination_base/" . $i, 'single_paged' );
} else {
$url = trailingslashit( get_permalink() ) . user_trailingslashit( $i, 'single_paged' );
}
}
if ( is_preview() ) {
if ( ( 'draft' !== $post->post_status ) && isset( $_GET['preview_id'], $_GET['preview_nonce'] ) ) {
$query_args['preview_id'] = wp_unslash( $_GET['preview_id'] );
$query_args['preview_nonce'] = wp_unslash( $_GET['preview_nonce'] );
}
$url = get_preview_post_link( $post, $query_args, $url );
}
return '<a href="' . esc_url( $url ) . '" class="post-page-numbers">';
}
//
// Post-meta: Custom per-post fields.
//
/**
* Retrieve post custom meta data field.
*
* @since 1.5.0
*
* @param string $key Meta data key name.
* @return array|string|false Array of values, or single value if only one element exists.
* False if the key does not exist.
*/
function post_custom( $key = '' ) {
$custom = get_post_custom();
if ( ! isset( $custom[ $key ] ) ) {
return false;
} elseif ( 1 == count( $custom[ $key ] ) ) {
return $custom[ $key ][0];
} else {
return $custom[ $key ];
}
}
/**
* Display a list of post custom fields.
*
* @since 1.2.0
*
* @internal This will probably change at some point...
*/
function the_meta() {
$keys = get_post_custom_keys();
if ( $keys ) {
$li_html = '';
foreach ( (array) $keys as $key ) {
$keyt = trim( $key );
if ( is_protected_meta( $keyt, 'post' ) ) {
continue;
}
$values = array_map( 'trim', get_post_custom_values( $key ) );
$value = implode( ', ', $values );
$html = sprintf(
"<li><span class='post-meta-key'>%s</span> %s</li>\n",
/* translators: %s: Post custom field name. */
sprintf( _x( '%s:', 'Post custom field name' ), $key ),
$value
);
/**
* Filters the HTML output of the li element in the post custom fields list.
*
* @since 2.2.0
*
* @param string $html The HTML output for the li element.
* @param string $key Meta key.
* @param string $value Meta value.
*/
$li_html .= apply_filters( 'the_meta_key', $html, $key, $value );
}
if ( $li_html ) {
echo "<ul class='post-meta'>\n{$li_html}</ul>\n";
}
}
}
//
// Pages.
//
/**
* Retrieve or display a list of pages as a dropdown (select list).
*
* @since 2.1.0
* @since 4.2.0 The `$value_field` argument was added.
* @since 4.3.0 The `$class` argument was added.
*
* @see get_pages()
*
* @param array|string $args {
* Optional. Array or string of arguments to generate a page dropdown. See `get_pages()` for additional arguments.
*
* @type int $depth Maximum depth. Default 0.
* @type int $child_of Page ID to retrieve child pages of. Default 0.
* @type int|string $selected Value of the option that should be selected. Default 0.
* @type bool|int $echo Whether to echo or return the generated markup. Accepts 0, 1,
* or their bool equivalents. Default 1.
* @type string $name Value for the 'name' attribute of the select element.
* Default 'page_id'.
* @type string $id Value for the 'id' attribute of the select element.
* @type string $class Value for the 'class' attribute of the select element. Default: none.
* Defaults to the value of `$name`.
* @type string $show_option_none Text to display for showing no pages. Default empty (does not display).
* @type string $show_option_no_change Text to display for "no change" option. Default empty (does not display).
* @type string $option_none_value Value to use when no page is selected. Default empty.
* @type string $value_field Post field used to populate the 'value' attribute of the option
* elements. Accepts any valid post field. Default 'ID'.
* }
* @return string HTML dropdown list of pages.
*/
function wp_dropdown_pages( $args = '' ) {
$defaults = array(
'depth' => 0,
'child_of' => 0,
'selected' => 0,
'echo' => 1,
'name' => 'page_id',
'id' => '',
'class' => '',
'show_option_none' => '',
'show_option_no_change' => '',
'option_none_value' => '',
'value_field' => 'ID',
);
$parsed_args = wp_parse_args( $args, $defaults );
$pages = get_pages( $parsed_args );
$output = '';
// Back-compat with old system where both id and name were based on $name argument.
if ( empty( $parsed_args['id'] ) ) {
$parsed_args['id'] = $parsed_args['name'];
}
if ( ! empty( $pages ) ) {
$class = '';
if ( ! empty( $parsed_args['class'] ) ) {
$class = " class='" . esc_attr( $parsed_args['class'] ) . "'";
}
$output = "<select name='" . esc_attr( $parsed_args['name'] ) . "'" . $class . " id='" . esc_attr( $parsed_args['id'] ) . "'>\n";
if ( $parsed_args['show_option_no_change'] ) {
$output .= "\t<option value=\"-1\">" . $parsed_args['show_option_no_change'] . "</option>\n";
}
if ( $parsed_args['show_option_none'] ) {
$output .= "\t<option value=\"" . esc_attr( $parsed_args['option_none_value'] ) . '">' . $parsed_args['show_option_none'] . "</option>\n";
}
$output .= walk_page_dropdown_tree( $pages, $parsed_args['depth'], $parsed_args );
$output .= "</select>\n";
}
/**
* Filters the HTML output of a list of pages as a drop down.
*
* @since 2.1.0
* @since 4.4.0 `$parsed_args` and `$pages` added as arguments.
*
* @param string $output HTML output for drop down list of pages.
* @param array $parsed_args The parsed arguments array.
* @param WP_Post[] $pages Array of the page objects.
*/
$html = apply_filters( 'wp_dropdown_pages', $output, $parsed_args, $pages );
if ( $parsed_args['echo'] ) {
echo $html;
}
return $html;
}
/**
* Retrieve or display a list of pages (or hierarchical post type items) in list (li) format.
*
* @since 1.5.0
* @since 4.7.0 Added the `item_spacing` argument.
*
* @see get_pages()
*
* @global WP_Query $wp_query WordPress Query object.
*
* @param array|string $args {
* Optional. Array or string of arguments to generate a list of pages. See `get_pages()` for additional arguments.
*
* @type int $child_of Display only the sub-pages of a single page by ID. Default 0 (all pages).
* @type string $authors Comma-separated list of author IDs. Default empty (all authors).
* @type string $date_format PHP date format to use for the listed pages. Relies on the 'show_date' parameter.
* Default is the value of 'date_format' option.
* @type int $depth Number of levels in the hierarchy of pages to include in the generated list.
* Accepts -1 (any depth), 0 (all pages), 1 (top-level pages only), and n (pages to
* the given n depth). Default 0.
* @type bool $echo Whether or not to echo the list of pages. Default true.
* @type string $exclude Comma-separated list of page IDs to exclude. Default empty.
* @type array $include Comma-separated list of page IDs to include. Default empty.
* @type string $link_after Text or HTML to follow the page link label. Default null.
* @type string $link_before Text or HTML to precede the page link label. Default null.
* @type string $post_type Post type to query for. Default 'page'.
* @type string|array $post_status Comma-separated list or array of post statuses to include. Default 'publish'.
* @type string $show_date Whether to display the page publish or modified date for each page. Accepts
* 'modified' or any other value. An empty value hides the date. Default empty.
* @type string $sort_column Comma-separated list of column names to sort the pages by. Accepts 'post_author',
* 'post_date', 'post_title', 'post_name', 'post_modified', 'post_modified_gmt',
* 'menu_order', 'post_parent', 'ID', 'rand', or 'comment_count'. Default 'post_title'.
* @type string $title_li List heading. Passing a null or empty value will result in no heading, and the list
* will not be wrapped with unordered list `<ul>` tags. Default 'Pages'.
* @type string $item_spacing Whether to preserve whitespace within the menu's HTML. Accepts 'preserve' or 'discard'.
* Default 'preserve'.
* @type Walker $walker Walker instance to use for listing pages. Default empty (Walker_Page).
* }
* @return void|string Void if 'echo' argument is true, HTML list of pages if 'echo' is false.
*/
function wp_list_pages( $args = '' ) {
$defaults = array(
'depth' => 0,
'show_date' => '',
'date_format' => get_option( 'date_format' ),
'child_of' => 0,
'exclude' => '',
'title_li' => __( 'Pages' ),
'echo' => 1,
'authors' => '',
'sort_column' => 'menu_order, post_title',
'link_before' => '',
'link_after' => '',
'item_spacing' => 'preserve',
'walker' => '',
);
$parsed_args = wp_parse_args( $args, $defaults );
if ( ! in_array( $parsed_args['item_spacing'], array( 'preserve', 'discard' ), true ) ) {
// Invalid value, fall back to default.
$parsed_args['item_spacing'] = $defaults['item_spacing'];
}
$output = '';
$current_page = 0;
// Sanitize, mostly to keep spaces out.
$parsed_args['exclude'] = preg_replace( '/[^0-9,]/', '', $parsed_args['exclude'] );
// Allow plugins to filter an array of excluded pages (but don't put a nullstring into the array).
$exclude_array = ( $parsed_args['exclude'] ) ? explode( ',', $parsed_args['exclude'] ) : array();
/**
* Filters the array of pages to exclude from the pages list.
*
* @since 2.1.0
*
* @param string[] $exclude_array An array of page IDs to exclude.
*/
$parsed_args['exclude'] = implode( ',', apply_filters( 'wp_list_pages_excludes', $exclude_array ) );
$parsed_args['hierarchical'] = 0;
// Query pages.
$pages = get_pages( $parsed_args );
if ( ! empty( $pages ) ) {
if ( $parsed_args['title_li'] ) {
$output .= '<li class="pagenav">' . $parsed_args['title_li'] . '<ul>';
}
global $wp_query;
if ( is_page() || is_attachment() || $wp_query->is_posts_page ) {
$current_page = get_queried_object_id();
} elseif ( is_singular() ) {
$queried_object = get_queried_object();
if ( is_post_type_hierarchical( $queried_object->post_type ) ) {
$current_page = $queried_object->ID;
}
}
$output .= walk_page_tree( $pages, $parsed_args['depth'], $current_page, $parsed_args );
if ( $parsed_args['title_li'] ) {
$output .= '</ul></li>';
}
}
/**
* Filters the HTML output of the pages to list.
*
* @since 1.5.1
* @since 4.4.0 `$pages` added as arguments.
*
* @see wp_list_pages()
*
* @param string $output HTML output of the pages list.
* @param array $parsed_args An array of page-listing arguments.
* @param WP_Post[] $pages Array of the page objects.
*/
$html = apply_filters( 'wp_list_pages', $output, $parsed_args, $pages );
if ( $parsed_args['echo'] ) {
echo $html;
} else {
return $html;
}
}
/**
* Displays or retrieves a list of pages with an optional home link.
*
* The arguments are listed below and part of the arguments are for wp_list_pages() function.
* Check that function for more info on those arguments.
*
* @since 2.7.0
* @since 4.4.0 Added `menu_id`, `container`, `before`, `after`, and `walker` arguments.
* @since 4.7.0 Added the `item_spacing` argument.
*
* @param array|string $args {
* Optional. Array or string of arguments to generate a page menu. See `wp_list_pages()` for additional arguments.
*
* @type string $sort_column How to sort the list of pages. Accepts post column names.
* Default 'menu_order, post_title'.
* @type string $menu_id ID for the div containing the page list. Default is empty string.
* @type string $menu_class Class to use for the element containing the page list. Default 'menu'.
* @type string $container Element to use for the element containing the page list. Default 'div'.
* @type bool $echo Whether to echo the list or return it. Accepts true (echo) or false (return).
* Default true.
* @type int|bool|string $show_home Whether to display the link to the home page. Can just enter the text
* you'd like shown for the home link. 1|true defaults to 'Home'.
* @type string $link_before The HTML or text to prepend to $show_home text. Default empty.
* @type string $link_after The HTML or text to append to $show_home text. Default empty.
* @type string $before The HTML or text to prepend to the menu. Default is '<ul>'.
* @type string $after The HTML or text to append to the menu. Default is '</ul>'.
* @type string $item_spacing Whether to preserve whitespace within the menu's HTML. Accepts 'preserve'
* or 'discard'. Default 'discard'.
* @type Walker $walker Walker instance to use for listing pages. Default empty (Walker_Page).
* }
* @return void|string Void if 'echo' argument is true, HTML menu if 'echo' is false.
*/
function wp_page_menu( $args = array() ) {
$defaults = array(
'sort_column' => 'menu_order, post_title',
'menu_id' => '',
'menu_class' => 'menu',
'container' => 'div',
'echo' => true,
'link_before' => '',
'link_after' => '',
'before' => '<ul>',
'after' => '</ul>',
'item_spacing' => 'discard',
'walker' => '',
);
$args = wp_parse_args( $args, $defaults );
if ( ! in_array( $args['item_spacing'], array( 'preserve', 'discard' ) ) ) {
// Invalid value, fall back to default.
$args['item_spacing'] = $defaults['item_spacing'];
}
if ( 'preserve' === $args['item_spacing'] ) {
$t = "\t";
$n = "\n";
} else {
$t = '';
$n = '';
}
/**
* Filters the arguments used to generate a page-based menu.
*
* @since 2.7.0
*
* @see wp_page_menu()
*
* @param array $args An array of page menu arguments.
*/
$args = apply_filters( 'wp_page_menu_args', $args );
$menu = '';
$list_args = $args;
// Show Home in the menu.
if ( ! empty( $args['show_home'] ) ) {
if ( true === $args['show_home'] || '1' === $args['show_home'] || 1 === $args['show_home'] ) {
$text = __( 'Home' );
} else {
$text = $args['show_home'];
}
$class = '';
if ( is_front_page() && ! is_paged() ) {
$class = 'class="current_page_item"';
}
$menu .= '<li ' . $class . '><a href="' . home_url( '/' ) . '">' . $args['link_before'] . $text . $args['link_after'] . '</a></li>';
// If the front page is a page, add it to the exclude list.
if ( get_option( 'show_on_front' ) == 'page' ) {
if ( ! empty( $list_args['exclude'] ) ) {
$list_args['exclude'] .= ',';
} else {
$list_args['exclude'] = '';
}
$list_args['exclude'] .= get_option( 'page_on_front' );
}
}
$list_args['echo'] = false;
$list_args['title_li'] = '';
$menu .= wp_list_pages( $list_args );
$container = sanitize_text_field( $args['container'] );
// Fallback in case `wp_nav_menu()` was called without a container.
if ( empty( $container ) ) {
$container = 'div';
}
if ( $menu ) {
// wp_nav_menu() doesn't set before and after.
if ( isset( $args['fallback_cb'] ) &&
'wp_page_menu' === $args['fallback_cb'] &&
'ul' !== $container ) {
$args['before'] = "<ul>{$n}";
$args['after'] = '</ul>';
}
$menu = $args['before'] . $menu . $args['after'];
}
$attrs = '';
if ( ! empty( $args['menu_id'] ) ) {
$attrs .= ' id="' . esc_attr( $args['menu_id'] ) . '"';
}
if ( ! empty( $args['menu_class'] ) ) {
$attrs .= ' class="' . esc_attr( $args['menu_class'] ) . '"';
}
$menu = "<{$container}{$attrs}>" . $menu . "</{$container}>{$n}";
/**
* Filters the HTML output of a page-based menu.
*
* @since 2.7.0
*
* @see wp_page_menu()
*
* @param string $menu The HTML output.
* @param array $args An array of arguments.
*/
$menu = apply_filters( 'wp_page_menu', $menu, $args );
if ( $args['echo'] ) {
echo $menu;
} else {
return $menu;
}
}
//
// Page helpers.
//
/**
* Retrieve HTML list content for page list.
*
* @uses Walker_Page to create HTML list content.
* @since 2.1.0
*
* @param array $pages
* @param int $depth
* @param int $current_page
* @param array $r
* @return string
*/
function walk_page_tree( $pages, $depth, $current_page, $r ) {
if ( empty( $r['walker'] ) ) {
$walker = new Walker_Page;
} else {
$walker = $r['walker'];
}
foreach ( (array) $pages as $page ) {
if ( $page->post_parent ) {
$r['pages_with_children'][ $page->post_parent ] = true;
}
}
return $walker->walk( $pages, $depth, $r, $current_page );
}
/**
* Retrieve HTML dropdown (select) content for page list.
*
* @since 2.1.0
* @since 5.3.0 Formalized the existing `...$args` parameter by adding it
* to the function signature.
*
* @uses Walker_PageDropdown to create HTML dropdown content.
* @see Walker_PageDropdown::walk() for parameters and return description.
*
* @return string
*/
function walk_page_dropdown_tree( ...$args ) {
if ( empty( $args[2]['walker'] ) ) { // The user's options are the third parameter.
$walker = new Walker_PageDropdown;
} else {
$walker = $args[2]['walker'];
}
return $walker->walk( ...$args );
}
//
// Attachments.
//
/**
* Display an attachment page link using an image or icon.
*
* @since 2.0.0
*
* @param int|WP_Post $id Optional. Post ID or post object.
* @param bool $fullsize Optional, default is false. Whether to use full size.
* @param bool $deprecated Deprecated. Not used.
* @param bool $permalink Optional, default is false. Whether to include permalink.
*/
function the_attachment_link( $id = 0, $fullsize = false, $deprecated = false, $permalink = false ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.5.0' );
}
if ( $fullsize ) {
echo wp_get_attachment_link( $id, 'full', $permalink );
} else {
echo wp_get_attachment_link( $id, 'thumbnail', $permalink );
}
}
/**
* Retrieve an attachment page link using an image or icon, if possible.
*
* @since 2.5.0
* @since 4.4.0 The `$id` parameter can now accept either a post ID or `WP_Post` object.
*
* @param int|WP_Post $id Optional. Post ID or post object.
* @param string|array $size Optional. Image size. Accepts any valid image size, or an array
* of width and height values in pixels (in that order).
* Default 'thumbnail'.
* @param bool $permalink Optional, Whether to add permalink to image. Default false.
* @param bool $icon Optional. Whether the attachment is an icon. Default false.
* @param string|false $text Optional. Link text to use. Activated by passing a string, false otherwise.
* Default false.
* @param array|string $attr Optional. Array or string of attributes. Default empty.
* @return string HTML content.
*/
function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = false, $icon = false, $text = false, $attr = '' ) {
$_post = get_post( $id );
if ( empty( $_post ) || ( 'attachment' !== $_post->post_type ) || ! wp_get_attachment_url( $_post->ID ) ) {
return __( 'Missing Attachment' );
}
$url = wp_get_attachment_url( $_post->ID );
if ( $permalink ) {
$url = get_attachment_link( $_post->ID );
}
if ( $text ) {
$link_text = $text;
} elseif ( $size && 'none' != $size ) {
$link_text = wp_get_attachment_image( $_post->ID, $size, $icon, $attr );
} else {
$link_text = '';
}
if ( '' === trim( $link_text ) ) {
$link_text = $_post->post_title;
}
if ( '' === trim( $link_text ) ) {
$link_text = esc_html( pathinfo( get_attached_file( $_post->ID ), PATHINFO_FILENAME ) );
}
/**
* Filters a retrieved attachment page link.
*
* @since 2.7.0
* @since 5.1.0 Added the $attr parameter.
*
* @param string $link_html The page link HTML output.
* @param int $id Post ID.
* @param string|array $size Size of the image. Image size or array of width and height values (in that order).
* Default 'thumbnail'.
* @param bool $permalink Whether to add permalink to image. Default false.
* @param bool $icon Whether to include an icon. Default false.
* @param string|bool $text If string, will be link text. Default false.
* @param array|string $attr Array or string of attributes. Default empty.
*/
return apply_filters( 'wp_get_attachment_link', "<a href='" . esc_url( $url ) . "'>$link_text</a>", $id, $size, $permalink, $icon, $text, $attr );
}
/**
* Wrap attachment in paragraph tag before content.
*
* @since 2.0.0
*
* @param string $content
* @return string
*/
function prepend_attachment( $content ) {
$post = get_post();
if ( empty( $post->post_type ) || $post->post_type != 'attachment' ) {
return $content;
}
if ( wp_attachment_is( 'video', $post ) ) {
$meta = wp_get_attachment_metadata( get_the_ID() );
$atts = array( 'src' => wp_get_attachment_url() );
if ( ! empty( $meta['width'] ) && ! empty( $meta['height'] ) ) {
$atts['width'] = (int) $meta['width'];
$atts['height'] = (int) $meta['height'];
}
if ( has_post_thumbnail() ) {
$atts['poster'] = wp_get_attachment_url( get_post_thumbnail_id() );
}
$p = wp_video_shortcode( $atts );
} elseif ( wp_attachment_is( 'audio', $post ) ) {
$p = wp_audio_shortcode( array( 'src' => wp_get_attachment_url() ) );
} else {
$p = '<p class="attachment">';
// Show the medium sized image representation of the attachment if available, and link to the raw file.
$p .= wp_get_attachment_link( 0, 'medium', false );
$p .= '</p>';
}
/**
* Filters the attachment markup to be prepended to the post content.
*
* @since 2.0.0
*
* @see prepend_attachment()
*
* @param string $p The attachment HTML output.
*/
$p = apply_filters( 'prepend_attachment', $p );
return "$p\n$content";
}
//
// Misc.
//
/**
* Retrieve protected post password form content.
*
* @since 1.0.0
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
* @return string HTML content for password form for password protected post.
*/
function get_the_password_form( $post = 0 ) {
$post = get_post( $post );
$label = 'pwbox-' . ( empty( $post->ID ) ? rand() : $post->ID );
$output = '<form action="' . esc_url( site_url( 'wp-login.php?action=postpass', 'login_post' ) ) . '" class="post-password-form" method="post">
<p>' . __( 'This content is password protected. To view it please enter your password below:' ) . '</p>
<p><label for="' . $label . '">' . __( 'Password:' ) . ' <input name="post_password" id="' . $label . '" type="password" size="20" /></label> <input type="submit" name="Submit" value="' . esc_attr_x( 'Enter', 'post password form' ) . '" /></p></form>
';
/**
* Filters the HTML output for the protected post password form.
*
* If modifying the password field, please note that the core database schema
* limits the password field to 20 characters regardless of the value of the
* size attribute in the form input.
*
* @since 2.7.0
*
* @param string $output The password form HTML output.
*/
return apply_filters( 'the_password_form', $output );
}
/**
* Determines whether currently in a page template.
*
* This template tag allows you to determine if you are in a page template.
* You can optionally provide a template filename or array of template filenames
* and then the check will be specific to that template.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 2.5.0
* @since 4.2.0 The `$template` parameter was changed to also accept an array of page templates.
* @since 4.7.0 Now works with any post type, not just pages.
*
* @param string|array $template The specific template filename or array of templates to match.
* @return bool True on success, false on failure.
*/
function is_page_template( $template = '' ) {
if ( ! is_singular() ) {
return false;
}
$page_template = get_page_template_slug( get_queried_object_id() );
if ( empty( $template ) ) {
return (bool) $page_template;
}
if ( $template == $page_template ) {
return true;
}
if ( is_array( $template ) ) {
if ( ( in_array( 'default', $template, true ) && ! $page_template )
|| in_array( $page_template, $template, true )
) {
return true;
}
}
return ( 'default' === $template && ! $page_template );
}
/**
* Get the specific template filename for a given post.
*
* @since 3.4.0
* @since 4.7.0 Now works with any post type, not just pages.
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
* @return string|false Page template filename. Returns an empty string when the default page template
* is in use. Returns false if the post does not exist.
*/
function get_page_template_slug( $post = null ) {
$post = get_post( $post );
if ( ! $post ) {
return false;
}
$template = get_post_meta( $post->ID, '_wp_page_template', true );
if ( ! $template || 'default' == $template ) {
return '';
}
return $template;
}
/**
* Retrieve formatted date timestamp of a revision (linked to that revisions's page).
*
* @since 2.6.0
*
* @param int|object $revision Revision ID or revision object.
* @param bool $link Optional, default is true. Link to revisions's page?
* @return string|false i18n formatted datetimestamp or localized 'Current Revision'.
*/
function wp_post_revision_title( $revision, $link = true ) {
$revision = get_post( $revision );
if ( ! $revision ) {
return $revision;
}
if ( ! in_array( $revision->post_type, array( 'post', 'page', 'revision' ) ) ) {
return false;
}
/* translators: Revision date format, see https://www.php.net/date */
$datef = _x( 'F j, Y @ H:i:s', 'revision date format' );
/* translators: %s: Revision date. */
$autosavef = __( '%s [Autosave]' );
/* translators: %s: Revision date. */
$currentf = __( '%s [Current Revision]' );
$date = date_i18n( $datef, strtotime( $revision->post_modified ) );
$edit_link = get_edit_post_link( $revision->ID );
if ( $link && current_user_can( 'edit_post', $revision->ID ) && $edit_link ) {
$date = "<a href='$edit_link'>$date</a>";
}
if ( ! wp_is_post_revision( $revision ) ) {
$date = sprintf( $currentf, $date );
} elseif ( wp_is_post_autosave( $revision ) ) {
$date = sprintf( $autosavef, $date );
}
return $date;
}
/**
* Retrieve formatted date timestamp of a revision (linked to that revisions's page).
*
* @since 3.6.0
*
* @param int|object $revision Revision ID or revision object.
* @param bool $link Optional, default is true. Link to revisions's page?
* @return string|false gravatar, user, i18n formatted datetimestamp or localized 'Current Revision'.
*/
function wp_post_revision_title_expanded( $revision, $link = true ) {
$revision = get_post( $revision );
if ( ! $revision ) {
return $revision;
}
if ( ! in_array( $revision->post_type, array( 'post', 'page', 'revision' ) ) ) {
return false;
}
$author = get_the_author_meta( 'display_name', $revision->post_author );
/* translators: Revision date format, see https://www.php.net/date */
$datef = _x( 'F j, Y @ H:i:s', 'revision date format' );
$gravatar = get_avatar( $revision->post_author, 24 );
$date = date_i18n( $datef, strtotime( $revision->post_modified ) );
$edit_link = get_edit_post_link( $revision->ID );
if ( $link && current_user_can( 'edit_post', $revision->ID ) && $edit_link ) {
$date = "<a href='$edit_link'>$date</a>";
}
$revision_date_author = sprintf(
/* translators: Post revision title. 1: Author avatar, 2: Author name, 3: Time ago, 4: Date. */
__( '%1$s %2$s, %3$s ago (%4$s)' ),
$gravatar,
$author,
human_time_diff( strtotime( $revision->post_modified_gmt ) ),
$date
);
/* translators: %s: Revision date with author avatar. */
$autosavef = __( '%s [Autosave]' );
/* translators: %s: Revision date with author avatar. */
$currentf = __( '%s [Current Revision]' );
if ( ! wp_is_post_revision( $revision ) ) {
$revision_date_author = sprintf( $currentf, $revision_date_author );
} elseif ( wp_is_post_autosave( $revision ) ) {
$revision_date_author = sprintf( $autosavef, $revision_date_author );
}
/**
* Filters the formatted author and date for a revision.
*
* @since 4.4.0
*
* @param string $revision_date_author The formatted string.
* @param WP_Post $revision The revision object.
* @param bool $link Whether to link to the revisions page, as passed into
* wp_post_revision_title_expanded().
*/
return apply_filters( 'wp_post_revision_title_expanded', $revision_date_author, $revision, $link );
}
/**
* Display a list of a post's revisions.
*
* Can output either a UL with edit links or a TABLE with diff interface, and
* restore action links.
*
* @since 2.6.0
*
* @param int|WP_Post $post_id Optional. Post ID or WP_Post object. Default is global $post.
* @param string $type 'all' (default), 'revision' or 'autosave'
*/
function wp_list_post_revisions( $post_id = 0, $type = 'all' ) {
$post = get_post( $post_id );
if ( ! $post ) {
return;
}
// $args array with (parent, format, right, left, type) deprecated since 3.6.
if ( is_array( $type ) ) {
$type = ! empty( $type['type'] ) ? $type['type'] : $type;
_deprecated_argument( __FUNCTION__, '3.6.0' );
}
$revisions = wp_get_post_revisions( $post->ID );
if ( ! $revisions ) {
return;
}
$rows = '';
foreach ( $revisions as $revision ) {
if ( ! current_user_can( 'read_post', $revision->ID ) ) {
continue;
}
$is_autosave = wp_is_post_autosave( $revision );
if ( ( 'revision' === $type && $is_autosave ) || ( 'autosave' === $type && ! $is_autosave ) ) {
continue;
}
$rows .= "\t<li>" . wp_post_revision_title_expanded( $revision ) . "</li>\n";
}
echo "<div class='hide-if-js'><p>" . __( 'JavaScript must be enabled to use this feature.' ) . "</p></div>\n";
echo "<ul class='post-revisions hide-if-no-js'>\n";
echo $rows;
echo '</ul>';
}
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