WordPress/wp-admin/includes/plugin.php

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<?php
function get_plugin_data( $plugin_file ) {
$plugin_data = implode( '', file( $plugin_file ));
preg_match( '|Plugin Name:(.*)$|mi', $plugin_data, $plugin_name );
preg_match( '|Plugin URI:(.*)$|mi', $plugin_data, $plugin_uri );
preg_match( '|Description:(.*)$|mi', $plugin_data, $description );
preg_match( '|Author:(.*)$|mi', $plugin_data, $author_name );
preg_match( '|Author URI:(.*)$|mi', $plugin_data, $author_uri );
if ( preg_match( "|Version:(.*)|i", $plugin_data, $version ))
$version = trim( $version[1] );
else
$version = '';
$description = wptexturize( trim( $description[1] ));
$name = $plugin_name[1];
$name = trim( $name );
$plugin = $name;
if ('' != trim($plugin_uri[1]) && '' != $name ) {
$plugin = '<a href="' . trim( $plugin_uri[1] ) . '" title="'.__( 'Visit plugin homepage' ).'">'.$plugin.'</a>';
}
if ('' == $author_uri[1] ) {
$author = trim( $author_name[1] );
} else {
$author = '<a href="' . trim( $author_uri[1] ) . '" title="'.__( 'Visit author homepage' ).'">' . trim( $author_name[1] ) . '</a>';
}
return array('Name' => $name, 'Title' => $plugin, 'Description' => $description, 'Author' => $author, 'Version' => $version);
}
function get_plugins($plugin_folder = '') {
global $wp_plugins;
if ( isset( $wp_plugins ) ) {
return $wp_plugins;
}
$wp_plugins = array ();
$plugin_root = ABSPATH . PLUGINDIR;
if( !empty($plugin_folder) )
$plugin_root .= $plugin_folder;
// Files in wp-content/plugins directory
$plugins_dir = @ opendir( $plugin_root);
if ( $plugins_dir ) {
while (($file = readdir( $plugins_dir ) ) !== false ) {
if ( substr($file, 0, 1) == '.' )
continue;
if ( is_dir( $plugin_root.'/'.$file ) ) {
$plugins_subdir = @ opendir( $plugin_root.'/'.$file );
if ( $plugins_subdir ) {
while (($subfile = readdir( $plugins_subdir ) ) !== false ) {
if ( substr($subfile, 0, 1) == '.' )
continue;
if ( substr($subfile, -4) == '.php' )
$plugin_files[] = "$file/$subfile";
}
}
} else {
if ( substr($file, -4) == '.php' )
$plugin_files[] = $file;
}
}
}
@closedir( $plugins_dir );
@closedir( $plugins_subdir );
if ( !$plugins_dir || !$plugin_files )
return $wp_plugins;
foreach ( $plugin_files as $plugin_file ) {
if ( !is_readable( "$plugin_root/$plugin_file" ) )
continue;
$plugin_data = get_plugin_data( "$plugin_root/$plugin_file" );
if ( empty ( $plugin_data['Name'] ) )
continue;
$wp_plugins[plugin_basename( $plugin_file )] = $plugin_data;
}
uasort( $wp_plugins, create_function( '$a, $b', 'return strnatcasecmp( $a["Name"], $b["Name"] );' ));
return $wp_plugins;
}
function is_plugin_active($plugin){
return in_array($plugin, get_option('active_plugins'));
}
function activate_plugin($plugin, $redirect = '') {
$current = get_option('active_plugins');
$plugin = trim($plugin);
$valid = validate_plugin($plugin);
if ( is_wp_error($valid) )
return $valid;
if ( !in_array($plugin, $current) ) {
if ( !empty($redirect) )
wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error
ob_start();
@include(ABSPATH . PLUGINDIR . '/' . $plugin);
$current[] = $plugin;
sort($current);
update_option('active_plugins', $current);
do_action('activate_' . $plugin);
ob_end_clean();
}
return null;
}
function deactivate_plugins($plugins, $silent= false) {
$current = get_option('active_plugins');
if ( !is_array($plugins) )
$plugins = array($plugins);
foreach ( $plugins as $plugin ) {
if( ! is_plugin_active($plugin) )
continue;
array_splice($current, array_search( $plugin, $current), 1 ); // Fixed Array-fu!
if ( ! $silent ) //Used by Plugin updater to internally deactivate plugin, however, not to notify plugins of the fact to prevent plugin output.
do_action('deactivate_' . trim( $plugin ));
}
update_option('active_plugins', $current);
}
function deactivate_all_plugins() {
$current = get_option('active_plugins');
if ( empty($current) )
return;
deactivate_plugins($current);
update_option('deactivated_plugins', $current);
}
function reactivate_all_plugins($redirect = '') {
$plugins = get_option('deactivated_plugins');
if ( empty($plugins) )
return;
if ( !empty($redirect) )
wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect));
$errors = array();
foreach ( (array) $plugins as $plugin ) {
$result = activate_plugin($plugin);
if ( is_wp_error($result) )
$errors[$plugin] = $result;
}
delete_option('deactivated_plugins');
if ( !empty($errors) )
return new WP_Error('plugins_invalid', __('One of the plugins is invalid.'), $errors);
return true;
}
function validate_active_plugins() {
$check_plugins = get_option('active_plugins');
// Sanity check. If the active plugin list is not an array, make it an
// empty array.
if ( !is_array($check_plugins) ) {
update_option('active_plugins', array());
return;
}
// If a plugin file does not exist, remove it from the list of active
// plugins.
foreach ( $check_plugins as $check_plugin ) {
if ( !file_exists(ABSPATH . PLUGINDIR . '/' . $check_plugin) ) {
$current = get_option('active_plugins');
$key = array_search($check_plugin, $current);
if ( false !== $key && NULL !== $key ) {
unset($current[$key]);
update_option('active_plugins', $current);
}
}
}
}
function validate_plugin($plugin) {
if ( validate_file($plugin) )
return new WP_Error('plugin_invalid', __('Invalid plugin.'));
if ( ! file_exists(ABSPATH . PLUGINDIR . '/' . $plugin) )
return new WP_Error('plugin_not_found', __('Plugin file does not exist.'));
return 0;
}
//
// Menu
//
function add_menu_page( $page_title, $menu_title, $access_level, $file, $function = '' ) {
global $menu, $admin_page_hooks;
$file = plugin_basename( $file );
$menu[] = array ( $menu_title, $access_level, $file, $page_title );
$admin_page_hooks[$file] = sanitize_title( $menu_title );
$hookname = get_plugin_page_hookname( $file, '' );
if (!empty ( $function ) && !empty ( $hookname ))
add_action( $hookname, $function );
return $hookname;
}
function add_submenu_page( $parent, $page_title, $menu_title, $access_level, $file, $function = '' ) {
global $submenu;
global $menu;
global $_wp_real_parent_file;
global $_wp_submenu_nopriv;
$file = plugin_basename( $file );
$parent = plugin_basename( $parent);
if ( isset( $_wp_real_parent_file[$parent] ) )
$parent = $_wp_real_parent_file[$parent];
if ( !current_user_can( $access_level ) ) {
$_wp_submenu_nopriv[$parent][$file] = true;
return false;
}
// If the parent doesn't already have a submenu, add a link to the parent
// as the first item in the submenu. If the submenu file is the same as the
// parent file someone is trying to link back to the parent manually. In
// this case, don't automatically add a link back to avoid duplication.
if (!isset( $submenu[$parent] ) && $file != $parent ) {
foreach ( $menu as $parent_menu ) {
if ( $parent_menu[2] == $parent && current_user_can( $parent_menu[1] ) )
$submenu[$parent][] = $parent_menu;
}
}
$submenu[$parent][] = array ( $menu_title, $access_level, $file, $page_title );
$hookname = get_plugin_page_hookname( $file, $parent);
if (!empty ( $function ) && !empty ( $hookname ))
add_action( $hookname, $function );
return $hookname;
}
function add_management_page( $page_title, $menu_title, $access_level, $file, $function = '' ) {
return add_submenu_page( 'edit.php', $page_title, $menu_title, $access_level, $file, $function );
}
function add_options_page( $page_title, $menu_title, $access_level, $file, $function = '' ) {
return add_submenu_page( 'options-general.php', $page_title, $menu_title, $access_level, $file, $function );
}
function add_theme_page( $page_title, $menu_title, $access_level, $file, $function = '' ) {
return add_submenu_page( 'themes.php', $page_title, $menu_title, $access_level, $file, $function );
}
function add_users_page( $page_title, $menu_title, $access_level, $file, $function = '' ) {
if ( current_user_can('edit_users') )
$parent = 'users.php';
else
$parent = 'profile.php';
return add_submenu_page( $parent, $page_title, $menu_title, $access_level, $file, $function );
}
//
// Pluggable Menu Support -- Private
//
function get_admin_page_parent() {
global $parent_file;
global $menu;
global $submenu;
global $pagenow;
global $plugin_page;
global $_wp_real_parent_file;
global $_wp_menu_nopriv;
global $_wp_submenu_nopriv;
if ( !empty ( $parent_file ) ) {
if ( isset( $_wp_real_parent_file[$parent_file] ) )
$parent_file = $_wp_real_parent_file[$parent_file];
return $parent_file;
}
if ( $pagenow == 'admin.php' && isset( $plugin_page ) ) {
foreach ( $menu as $parent_menu ) {
if ( $parent_menu[2] == $plugin_page ) {
$parent_file = $plugin_page;
if ( isset( $_wp_real_parent_file[$parent_file] ) )
$parent_file = $_wp_real_parent_file[$parent_file];
return $parent_file;
}
}
if ( isset( $_wp_menu_nopriv[$plugin_page] ) ) {
$parent_file = $plugin_page;
if ( isset( $_wp_real_parent_file[$parent_file] ) )
$parent_file = $_wp_real_parent_file[$parent_file];
return $parent_file;
}
}
if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$pagenow][$plugin_page] ) ) {
$parent_file = $pagenow;
if ( isset( $_wp_real_parent_file[$parent_file] ) )
$parent_file = $_wp_real_parent_file[$parent_file];
return $parent_file;
}
foreach (array_keys( $submenu ) as $parent) {
foreach ( $submenu[$parent] as $submenu_array ) {
if ( isset( $_wp_real_parent_file[$parent] ) )
$parent = $_wp_real_parent_file[$parent];
if ( $submenu_array[2] == $pagenow ) {
$parent_file = $parent;
return $parent;
} else
if ( isset( $plugin_page ) && ($plugin_page == $submenu_array[2] ) ) {
$parent_file = $parent;
return $parent;
}
}
}
$parent_file = '';
return '';
}
function get_admin_page_title() {
global $title;
global $menu;
global $submenu;
global $pagenow;
global $plugin_page;
if ( isset( $title ) && !empty ( $title ) ) {
return $title;
}
$hook = get_plugin_page_hook( $plugin_page, $pagenow );
$parent = $parent1 = get_admin_page_parent();
if ( empty ( $parent) ) {
foreach ( $menu as $menu_array ) {
if ( isset( $menu_array[3] ) ) {
if ( $menu_array[2] == $pagenow ) {
$title = $menu_array[3];
return $menu_array[3];
} else
if ( isset( $plugin_page ) && ($plugin_page == $menu_array[2] ) && ($hook == $menu_array[3] ) ) {
$title = $menu_array[3];
return $menu_array[3];
}
} else {
$title = $menu_array[0];
return $title;
}
}
} else {
foreach (array_keys( $submenu ) as $parent) {
foreach ( $submenu[$parent] as $submenu_array ) {
if ( isset( $plugin_page ) &&
($plugin_page == $submenu_array[2] ) &&
(($parent == $pagenow ) || ($parent == $plugin_page ) || ($plugin_page == $hook ) || (($pagenow == 'admin.php' ) && ($parent1 != $submenu_array[2] ) ) )
) {
$title = $submenu_array[3];
return $submenu_array[3];
}
if ( $submenu_array[2] != $pagenow || isset( $_GET['page'] ) ) // not the current page
continue;
if ( isset( $submenu_array[3] ) ) {
$title = $submenu_array[3];
return $submenu_array[3];
} else {
$title = $submenu_array[0];
return $title;
}
}
}
}
return $title;
}
function get_plugin_page_hook( $plugin_page, $parent_page ) {
$hook = get_plugin_page_hookname( $plugin_page, $parent_page );
if ( has_action($hook) )
return $hook;
else
return null;
}
function get_plugin_page_hookname( $plugin_page, $parent_page ) {
global $admin_page_hooks;
$parent = get_admin_page_parent();
if ( empty ( $parent_page ) || 'admin.php' == $parent_page ) {
if ( isset( $admin_page_hooks[$plugin_page] ))
$page_type = 'toplevel';
else
if ( isset( $admin_page_hooks[$parent] ))
$page_type = $admin_page_hooks[$parent];
} else
if ( isset( $admin_page_hooks[$parent_page] ) ) {
$page_type = $admin_page_hooks[$parent_page];
} else {
$page_type = 'admin';
}
$plugin_name = preg_replace( '!\.php!', '', $plugin_page );
return $page_type.'_page_'.$plugin_name;
}
function user_can_access_admin_page() {
global $pagenow;
global $menu;
global $submenu;
global $_wp_menu_nopriv;
global $_wp_submenu_nopriv;
global $plugin_page;
$parent = get_admin_page_parent();
if ( isset( $_wp_submenu_nopriv[$parent][$pagenow] ) )
return false;
if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$parent][$plugin_page] ) )
return false;
if ( empty( $parent) ) {
if ( isset( $_wp_menu_nopriv[$pagenow] ) )
return false;
if ( isset( $_wp_submenu_nopriv[$pagenow][$pagenow] ) )
return false;
if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$pagenow][$plugin_page] ) )
return false;
foreach (array_keys( $_wp_submenu_nopriv ) as $key ) {
if ( isset( $_wp_submenu_nopriv[$key][$pagenow] ) )
return false;
if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$key][$plugin_page] ) )
return false;
}
return true;
}
if ( isset( $submenu[$parent] ) ) {
foreach ( $submenu[$parent] as $submenu_array ) {
if ( isset( $plugin_page ) && ( $submenu_array[2] == $plugin_page ) ) {
if ( current_user_can( $submenu_array[1] ))
return true;
else
return false;
} else if ( $submenu_array[2] == $pagenow ) {
if ( current_user_can( $submenu_array[1] ))
return true;
else
return false;
}
}
}
foreach ( $menu as $menu_array ) {
if ( $menu_array[2] == $parent) {
if ( current_user_can( $menu_array[1] ))
return true;
else
return false;
}
}
return true;
}
?>