400 lines
12 KiB
PHP
400 lines
12 KiB
PHP
<?php
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/**
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* Author Template functions for use in themes.
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*
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* These functions must be used within the WordPress Loop.
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*
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* @link http://codex.wordpress.org/Author_Templates
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*
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* @package WordPress
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* @subpackage Template
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*/
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/**
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* Retrieve the author of the current post.
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*
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* @since 1.5
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* @uses $authordata The current author's DB object.
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* @uses apply_filters() Calls 'the_author' hook on the author display name.
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*
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* @param string $deprecated Deprecated.
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* @return string The author's display name.
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*/
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function get_the_author($deprecated = '') {
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global $authordata;
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if ( !empty( $deprecated ) )
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_deprecated_argument( __FUNCTION__, '2.1' );
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return apply_filters('the_author', is_object($authordata) ? $authordata->display_name : null);
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}
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/**
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* Display the name of the author of the current post.
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*
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* The behavior of this function is based off of old functionality predating
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* get_the_author(). This function is not deprecated, but is designed to echo
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* the value from get_the_author() and as an result of any old theme that might
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* still use the old behavior will also pass the value from get_the_author().
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*
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* The normal, expected behavior of this function is to echo the author and not
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* return it. However, backwards compatibility has to be maintained.
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*
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* @since 0.71
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* @see get_the_author()
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* @link http://codex.wordpress.org/Template_Tags/the_author
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*
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* @param string $deprecated Deprecated.
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* @param string $deprecated_echo Deprecated. Use get_the_author(). Echo the string or return it.
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* @return string The author's display name, from get_the_author().
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*/
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function the_author( $deprecated = '', $deprecated_echo = true ) {
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if ( !empty( $deprecated ) )
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_deprecated_argument( __FUNCTION__, '2.1' );
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if ( $deprecated_echo !== true )
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_deprecated_argument( __FUNCTION__, '1.5', __('Use <code>get_the_author()</code> instead if you do not want the value echoed.') );
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if ( $deprecated_echo )
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echo get_the_author();
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return get_the_author();
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}
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/**
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* Retrieve the author who last edited the current post.
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*
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* @since 2.8
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* @uses $post The current post's DB object.
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* @uses get_post_meta() Retrieves the ID of the author who last edited the current post.
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* @uses get_userdata() Retrieves the author's DB object.
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* @uses apply_filters() Calls 'the_modified_author' hook on the author display name.
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* @return string The author's display name.
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*/
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function get_the_modified_author() {
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global $post;
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if ( $last_id = get_post_meta($post->ID, '_edit_last', true) ) {
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$last_user = get_userdata($last_id);
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return apply_filters('the_modified_author', $last_user->display_name);
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}
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}
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/**
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* Display the name of the author who last edited the current post.
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*
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* @since 2.8
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* @see get_the_author()
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* @return string The author's display name, from get_the_modified_author().
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*/
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function the_modified_author() {
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echo get_the_modified_author();
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}
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/**
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* Retrieve the requested data of the author of the current post.
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* @link http://codex.wordpress.org/Template_Tags/the_author_meta
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* @since 2.8.0
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* @uses $authordata The current author's DB object (if $user_id not specified).
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* @param string $field selects the field of the users record.
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* @param int $user_id Optional. User ID.
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* @return string The author's field from the current author's DB object.
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*/
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function get_the_author_meta($field = '', $user_id = false) {
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if ( ! $user_id )
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global $authordata;
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else
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$authordata = get_userdata( $user_id );
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// Keys used as object vars cannot have dashes.
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$field = str_replace('-', '', $field);
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$field = strtolower($field);
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$user_field = "user_$field";
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if ( 'id' == $field )
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$value = isset($authordata->ID) ? (int)$authordata->ID : 0;
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elseif ( isset($authordata->$user_field) )
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$value = $authordata->$user_field;
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else
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$value = isset($authordata->$field) ? $authordata->$field : '';
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return apply_filters('get_the_author_' . $field, $value, $user_id);
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}
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/**
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* Retrieve the requested data of the author of the current post.
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* @link http://codex.wordpress.org/Template_Tags/the_author_meta
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* @since 2.8.0
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* @param string $field selects the field of the users record.
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* @param int $user_id Optional. User ID.
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* @echo string The author's field from the current author's DB object.
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*/
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function the_author_meta($field = '', $user_id = false) {
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echo apply_filters('the_author_' . $field, get_the_author_meta($field, $user_id), $user_id);
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}
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/**
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* Retrieve either author's link or author's name.
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*
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* If the author has a home page set, return an HTML link, otherwise just return the
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* author's name.
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*
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* @uses get_the_author_meta()
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* @uses get_the_author()
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*/
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function get_the_author_link() {
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if ( get_the_author_meta('url') ) {
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return '<a href="' . get_the_author_meta('url') . '" title="' . esc_attr( sprintf(__("Visit %s’s website"), get_the_author()) ) . '" rel="external">' . get_the_author() . '</a>';
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} else {
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return get_the_author();
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}
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}
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/**
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* Display either author's link or author's name.
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*
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* If the author has a home page set, echo an HTML link, otherwise just echo the
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* author's name.
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*
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* @link http://codex.wordpress.org/Template_Tags/the_author_link
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* @since 2.1
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* @uses get_the_author_link()
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*/
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function the_author_link() {
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echo get_the_author_link();
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}
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/**
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* Retrieve the number of posts by the author of the current post.
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*
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* @since 1.5
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* @uses $post The current post in the Loop's DB object.
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* @uses count_user_posts()
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* @return int The number of posts by the author.
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*/
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function get_the_author_posts() {
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global $post;
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return count_user_posts($post->post_author);
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}
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/**
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* Display the number of posts by the author of the current post.
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*
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* @link http://codex.wordpress.org/Template_Tags/the_author_posts
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* @since 0.71
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* @uses get_the_author_posts() Echoes returned value from function.
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*/
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function the_author_posts() {
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echo get_the_author_posts();
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}
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/**
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* Display an HTML link to the author page of the author of the current post.
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*
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* Does just echo get_author_posts_url() function, like the others do. The
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* reason for this, is that another function is used to help in printing the
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* link to the author's posts.
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*
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* @link http://codex.wordpress.org/Template_Tags/the_author_posts_link
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* @since 1.2.0
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* @uses $authordata The current author's DB object.
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* @uses get_author_posts_url()
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* @uses get_the_author()
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* @param string $deprecated Deprecated.
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*/
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function the_author_posts_link($deprecated = '') {
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if ( !empty( $deprecated ) )
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_deprecated_argument( __FUNCTION__, '2.1' );
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global $authordata;
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if ( !is_object( $authordata ) )
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return false;
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$link = sprintf(
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'<a href="%1$s" title="%2$s" rel="author">%3$s</a>',
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get_author_posts_url( $authordata->ID, $authordata->user_nicename ),
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esc_attr( sprintf( __( 'Posts by %s' ), get_the_author() ) ),
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get_the_author()
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);
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echo apply_filters( 'the_author_posts_link', $link );
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}
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/**
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* Retrieve the URL to the author page for the user with the ID provided.
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*
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* @since 2.1.0
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* @uses $wp_rewrite WP_Rewrite
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* @return string The URL to the author's page.
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*/
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function get_author_posts_url($author_id, $author_nicename = '') {
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global $wp_rewrite;
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$auth_ID = (int) $author_id;
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$link = $wp_rewrite->get_author_permastruct();
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if ( empty($link) ) {
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$file = home_url( '/' );
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$link = $file . '?author=' . $auth_ID;
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} else {
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if ( '' == $author_nicename ) {
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$user = get_userdata($author_id);
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if ( !empty($user->user_nicename) )
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$author_nicename = $user->user_nicename;
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}
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$link = str_replace('%author%', $author_nicename, $link);
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$link = home_url( user_trailingslashit( $link ) );
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}
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$link = apply_filters('author_link', $link, $author_id, $author_nicename);
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return $link;
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}
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/**
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* List all the authors of the blog, with several options available.
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*
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* <ul>
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* <li>optioncount (boolean) (false): Show the count in parenthesis next to the
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* author's name.</li>
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* <li>exclude_admin (boolean) (true): Exclude the 'admin' user that is
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* installed bydefault.</li>
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* <li>show_fullname (boolean) (false): Show their full names.</li>
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* <li>hide_empty (boolean) (true): Don't show authors without any posts.</li>
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* <li>feed (string) (''): If isn't empty, show links to author's feeds.</li>
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* <li>feed_image (string) (''): If isn't empty, use this image to link to
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* feeds.</li>
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* <li>echo (boolean) (true): Set to false to return the output, instead of
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* echoing.</li>
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* <li>style (string) ('list'): Whether to display list of authors in list form
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* or as a string.</li>
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* <li>html (bool) (true): Whether to list the items in html form or plaintext.
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* </li>
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* </ul>
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*
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* @link http://codex.wordpress.org/Template_Tags/wp_list_authors
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* @since 1.2.0
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* @param array $args The argument array.
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* @return null|string The output, if echo is set to false.
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*/
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function wp_list_authors($args = '') {
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global $wpdb;
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$defaults = array(
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'orderby' => 'name', 'order' => 'ASC', 'number' => '',
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'optioncount' => false, 'exclude_admin' => true,
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'show_fullname' => false, 'hide_empty' => true,
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'feed' => '', 'feed_image' => '', 'feed_type' => '', 'echo' => true,
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'style' => 'list', 'html' => true
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);
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$args = wp_parse_args( $args, $defaults );
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extract( $args, EXTR_SKIP );
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$return = '';
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$query_args = wp_array_slice_assoc( $args, array( 'orderby', 'order', 'number' ) );
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$query_args['fields'] = 'ids';
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$authors = get_users( $query_args );
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$author_count = array();
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foreach ( (array) $wpdb->get_results("SELECT DISTINCT post_author, COUNT(ID) AS count FROM $wpdb->posts WHERE post_type = 'post' AND " . get_private_posts_cap_sql( 'post' ) . " GROUP BY post_author") as $row )
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$author_count[$row->post_author] = $row->count;
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foreach ( $authors as $author_id ) {
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$author = get_userdata( $author_id );
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if ( $exclude_admin && 'admin' == $author->display_name )
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continue;
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$posts = isset( $author_count[$author->ID] ) ? $author_count[$author->ID] : 0;
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if ( !$posts && $hide_empty )
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continue;
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$link = '';
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if ( $show_fullname && $author->first_name && $author->last_name )
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$name = "$author->first_name $author->last_name";
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else
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$name = $author->display_name;
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if ( !$html ) {
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$return .= $name . ', ';
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continue; // No need to go further to process HTML.
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}
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if ( 'list' == $style ) {
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$return .= '<li>';
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}
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$link = '<a href="' . get_author_posts_url( $author->ID, $author->user_nicename ) . '" title="' . esc_attr( sprintf(__("Posts by %s"), $author->display_name) ) . '">' . $name . '</a>';
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if ( !empty( $feed_image ) || !empty( $feed ) ) {
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$link .= ' ';
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if ( empty( $feed_image ) ) {
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$link .= '(';
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}
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$link .= '<a href="' . get_author_feed_link( $author->ID ) . '"';
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$alt = $title = '';
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if ( !empty( $feed ) ) {
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$title = ' title="' . esc_attr( $feed ) . '"';
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$alt = ' alt="' . esc_attr( $feed ) . '"';
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$name = $feed;
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$link .= $title;
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}
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$link .= '>';
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if ( !empty( $feed_image ) )
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$link .= '<img src="' . esc_url( $feed_image ) . '" style="border: none;"' . $alt . $title . ' />';
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else
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$link .= $name;
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$link .= '</a>';
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if ( empty( $feed_image ) )
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$link .= ')';
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}
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if ( $optioncount )
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$link .= ' ('. $posts . ')';
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$return .= $link;
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$return .= ( 'list' == $style ) ? '</li>' : ', ';
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}
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$return = rtrim($return, ', ');
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if ( !$echo )
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return $return;
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echo $return;
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}
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/**
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* Does this site have more than one author
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*
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* Checks to see if more than one author has published posts.
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*
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* @since 3.2.0
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* @return bool Whether or not we have more than one author
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*/
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function is_multi_author() {
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global $wpdb;
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if ( false === ( $is_multi_author = wp_cache_get('is_multi_author', 'posts') ) ) {
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$rows = (array) $wpdb->get_col("SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 2");
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$is_multi_author = 1 < count( $rows ) ? 1 : 0;
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wp_cache_set('is_multi_author', $is_multi_author, 'posts');
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}
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return apply_filters( 'is_multi_author', (bool) $is_multi_author );
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}
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/**
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* Helper function to clear the cache for number of authors.
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*
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* @private
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*/
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function __clear_multi_author_cache() {
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wp_cache_delete('is_multi_author', 'posts');
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}
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add_action('transition_post_status', '__clear_multi_author_cache');
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