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571e14f897
Comment and term meta lazyloading for `WP_Query` loops, introduced in 4.4, depended on filter callback methods belonging to `WP_Query` objects. This meant storing `WP_Query` objects in the `$wp_filter` global (via `add_filter()`), requiring that PHP retain the objects in memory, even when the local variables would typically be expunged during normal garbage collection. In cases where a large number of `WP_Query` objects were instantiated on a single pageload, and/or where the contents of the `WP_Query` objects were quite large, serious performance issues could result. We skirt this problem by moving metadata lazyloading out of `WP_Query`. The new `WP_Metadata_Lazyloader` class acts as a lazyload queue. Query instances register items whose metadata should be lazyloaded - such as post terms, or comments - and a `WP_Metadata_Lazyloader` method will intercept comment and term meta requests to perform the cache priming. Since `WP_Metadata_Lazyloader` instances are far smaller than `WP_Query` (containing only object IDs), and clean up after themselves far better than the previous `WP_Query` methods (bp only running their callbacks a single time for a given set of queued objects), the resource use is decreased dramatically. See [36525] for an earlier step in this direction. Props lpawlik, stevegrunwell, boonebgorges. Fixes #35816. Built from https://develop.svn.wordpress.org/trunk@36566 git-svn-id: http://core.svn.wordpress.org/trunk@36533 1a063a9b-81f0-0310-95a4-ce76da25c4cd
415 lines
13 KiB
PHP
415 lines
13 KiB
PHP
<?php
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/**
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* Used to set up and fix common variables and include
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* the WordPress procedural and class library.
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*
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* Allows for some configuration in wp-config.php (see default-constants.php)
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*
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* @internal This file must be parsable by PHP4.
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*
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* @package WordPress
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*/
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/**
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* Stores the location of the WordPress directory of functions, classes, and core content.
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*
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* @since 1.0.0
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*/
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define( 'WPINC', 'wp-includes' );
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// Include files required for initialization.
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require( ABSPATH . WPINC . '/load.php' );
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require( ABSPATH . WPINC . '/default-constants.php' );
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/*
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* These can't be directly globalized in version.php. When updating,
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* we're including version.php from another install and don't want
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* these values to be overridden if already set.
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*/
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global $wp_version, $wp_db_version, $tinymce_version, $required_php_version, $required_mysql_version, $wp_local_package;
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require( ABSPATH . WPINC . '/version.php' );
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/**
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* If not already configured, `$blog_id` will default to 1 in a single site
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* configuration. In multisite, it will be overridden by default in ms-settings.php.
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*
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* @global int $blog_id
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* @since 2.0.0
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*/
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global $blog_id;
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// Set initial default constants including WP_MEMORY_LIMIT, WP_MAX_MEMORY_LIMIT, WP_DEBUG, SCRIPT_DEBUG, WP_CONTENT_DIR and WP_CACHE.
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wp_initial_constants();
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// Check for the required PHP version and for the MySQL extension or a database drop-in.
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wp_check_php_mysql_versions();
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// Disable magic quotes at runtime. Magic quotes are added using wpdb later in wp-settings.php.
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@ini_set( 'magic_quotes_runtime', 0 );
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@ini_set( 'magic_quotes_sybase', 0 );
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// WordPress calculates offsets from UTC.
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date_default_timezone_set( 'UTC' );
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// Turn register_globals off.
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wp_unregister_GLOBALS();
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// Standardize $_SERVER variables across setups.
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wp_fix_server_vars();
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// Check if we have received a request due to missing favicon.ico
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wp_favicon_request();
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// Check if we're in maintenance mode.
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wp_maintenance();
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// Start loading timer.
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timer_start();
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// Check if we're in WP_DEBUG mode.
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wp_debug_mode();
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// For an advanced caching plugin to use. Uses a static drop-in because you would only want one.
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if ( WP_CACHE )
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WP_DEBUG ? include( WP_CONTENT_DIR . '/advanced-cache.php' ) : @include( WP_CONTENT_DIR . '/advanced-cache.php' );
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// Define WP_LANG_DIR if not set.
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wp_set_lang_dir();
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// Load early WordPress files.
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require( ABSPATH . WPINC . '/compat.php' );
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require( ABSPATH . WPINC . '/functions.php' );
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require( ABSPATH . WPINC . '/class-wp.php' );
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require( ABSPATH . WPINC . '/class-wp-error.php' );
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require( ABSPATH . WPINC . '/plugin.php' );
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require( ABSPATH . WPINC . '/pomo/mo.php' );
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// Include the wpdb class and, if present, a db.php database drop-in.
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require_wp_db();
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// Set the database table prefix and the format specifiers for database table columns.
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$GLOBALS['table_prefix'] = $table_prefix;
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wp_set_wpdb_vars();
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// Start the WordPress object cache, or an external object cache if the drop-in is present.
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wp_start_object_cache();
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// Attach the default filters.
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require( ABSPATH . WPINC . '/default-filters.php' );
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// Initialize multisite if enabled.
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if ( is_multisite() ) {
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require( ABSPATH . WPINC . '/ms-blogs.php' );
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require( ABSPATH . WPINC . '/ms-settings.php' );
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} elseif ( ! defined( 'MULTISITE' ) ) {
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define( 'MULTISITE', false );
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}
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register_shutdown_function( 'shutdown_action_hook' );
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// Stop most of WordPress from being loaded if we just want the basics.
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if ( SHORTINIT )
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return false;
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// Load the L10n library.
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require_once( ABSPATH . WPINC . '/l10n.php' );
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// Run the installer if WordPress is not installed.
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wp_not_installed();
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// Load most of WordPress.
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require( ABSPATH . WPINC . '/class-wp-walker.php' );
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require( ABSPATH . WPINC . '/class-wp-ajax-response.php' );
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require( ABSPATH . WPINC . '/formatting.php' );
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require( ABSPATH . WPINC . '/capabilities.php' );
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require( ABSPATH . WPINC . '/class-wp-roles.php' );
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require( ABSPATH . WPINC . '/class-wp-role.php' );
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require( ABSPATH . WPINC . '/class-wp-user.php' );
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require( ABSPATH . WPINC . '/query.php' );
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require( ABSPATH . WPINC . '/date.php' );
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require( ABSPATH . WPINC . '/theme.php' );
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require( ABSPATH . WPINC . '/class-wp-theme.php' );
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require( ABSPATH . WPINC . '/template.php' );
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require( ABSPATH . WPINC . '/user.php' );
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require( ABSPATH . WPINC . '/class-wp-user-query.php' );
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require( ABSPATH . WPINC . '/session.php' );
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require( ABSPATH . WPINC . '/meta.php' );
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require( ABSPATH . WPINC . '/class-wp-meta-query.php' );
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require( ABSPATH . WPINC . '/class-wp-metadata-lazyloader.php' );
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require( ABSPATH . WPINC . '/general-template.php' );
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require( ABSPATH . WPINC . '/link-template.php' );
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require( ABSPATH . WPINC . '/author-template.php' );
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require( ABSPATH . WPINC . '/post.php' );
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require( ABSPATH . WPINC . '/class-walker-page.php' );
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require( ABSPATH . WPINC . '/class-walker-page-dropdown.php' );
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require( ABSPATH . WPINC . '/class-wp-post.php' );
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require( ABSPATH . WPINC . '/post-template.php' );
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require( ABSPATH . WPINC . '/revision.php' );
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require( ABSPATH . WPINC . '/post-formats.php' );
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require( ABSPATH . WPINC . '/post-thumbnail-template.php' );
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require( ABSPATH . WPINC . '/category.php' );
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require( ABSPATH . WPINC . '/class-walker-category.php' );
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require( ABSPATH . WPINC . '/class-walker-category-dropdown.php' );
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require( ABSPATH . WPINC . '/category-template.php' );
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require( ABSPATH . WPINC . '/comment.php' );
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require( ABSPATH . WPINC . '/class-wp-comment.php' );
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require( ABSPATH . WPINC . '/class-wp-comment-query.php' );
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require( ABSPATH . WPINC . '/class-walker-comment.php' );
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require( ABSPATH . WPINC . '/comment-template.php' );
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require( ABSPATH . WPINC . '/rewrite.php' );
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require( ABSPATH . WPINC . '/class-wp-rewrite.php' );
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require( ABSPATH . WPINC . '/feed.php' );
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require( ABSPATH . WPINC . '/bookmark.php' );
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require( ABSPATH . WPINC . '/bookmark-template.php' );
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require( ABSPATH . WPINC . '/kses.php' );
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require( ABSPATH . WPINC . '/cron.php' );
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require( ABSPATH . WPINC . '/deprecated.php' );
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require( ABSPATH . WPINC . '/script-loader.php' );
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require( ABSPATH . WPINC . '/taxonomy.php' );
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require( ABSPATH . WPINC . '/class-wp-term.php' );
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require( ABSPATH . WPINC . '/class-wp-tax-query.php' );
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require( ABSPATH . WPINC . '/update.php' );
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require( ABSPATH . WPINC . '/canonical.php' );
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require( ABSPATH . WPINC . '/shortcodes.php' );
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require( ABSPATH . WPINC . '/embed.php' );
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require( ABSPATH . WPINC . '/class-wp-embed.php' );
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require( ABSPATH . WPINC . '/class-wp-oembed-controller.php' );
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require( ABSPATH . WPINC . '/media.php' );
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require( ABSPATH . WPINC . '/http.php' );
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require( ABSPATH . WPINC . '/class-http.php' );
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require( ABSPATH . WPINC . '/class-wp-http-streams.php' );
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require( ABSPATH . WPINC . '/class-wp-http-curl.php' );
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require( ABSPATH . WPINC . '/class-wp-http-proxy.php' );
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require( ABSPATH . WPINC . '/class-wp-http-cookie.php' );
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require( ABSPATH . WPINC . '/class-wp-http-encoding.php' );
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require( ABSPATH . WPINC . '/class-wp-http-response.php' );
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require( ABSPATH . WPINC . '/widgets.php' );
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require( ABSPATH . WPINC . '/class-wp-widget.php' );
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require( ABSPATH . WPINC . '/class-wp-widget-factory.php' );
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require( ABSPATH . WPINC . '/nav-menu.php' );
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require( ABSPATH . WPINC . '/nav-menu-template.php' );
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require( ABSPATH . WPINC . '/admin-bar.php' );
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require( ABSPATH . WPINC . '/rest-api.php' );
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require( ABSPATH . WPINC . '/rest-api/class-wp-rest-server.php' );
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require( ABSPATH . WPINC . '/rest-api/class-wp-rest-response.php' );
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require( ABSPATH . WPINC . '/rest-api/class-wp-rest-request.php' );
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// Load multisite-specific files.
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if ( is_multisite() ) {
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require( ABSPATH . WPINC . '/ms-functions.php' );
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require( ABSPATH . WPINC . '/ms-default-filters.php' );
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require( ABSPATH . WPINC . '/ms-deprecated.php' );
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}
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// Define constants that rely on the API to obtain the default value.
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// Define must-use plugin directory constants, which may be overridden in the sunrise.php drop-in.
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wp_plugin_directory_constants();
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$GLOBALS['wp_plugin_paths'] = array();
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// Load must-use plugins.
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foreach ( wp_get_mu_plugins() as $mu_plugin ) {
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include_once( $mu_plugin );
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}
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unset( $mu_plugin );
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// Load network activated plugins.
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if ( is_multisite() ) {
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foreach ( wp_get_active_network_plugins() as $network_plugin ) {
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wp_register_plugin_realpath( $network_plugin );
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include_once( $network_plugin );
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}
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unset( $network_plugin );
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}
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/**
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* Fires once all must-use and network-activated plugins have loaded.
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*
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* @since 2.8.0
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*/
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do_action( 'muplugins_loaded' );
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if ( is_multisite() )
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ms_cookie_constants( );
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// Define constants after multisite is loaded.
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wp_cookie_constants();
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// Define and enforce our SSL constants
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wp_ssl_constants();
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// Create common globals.
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require( ABSPATH . WPINC . '/vars.php' );
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// Make taxonomies and posts available to plugins and themes.
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// @plugin authors: warning: these get registered again on the init hook.
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create_initial_taxonomies();
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create_initial_post_types();
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// Register the default theme directory root
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register_theme_directory( get_theme_root() );
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// Load active plugins.
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foreach ( wp_get_active_and_valid_plugins() as $plugin ) {
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wp_register_plugin_realpath( $plugin );
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include_once( $plugin );
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}
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unset( $plugin );
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// Load pluggable functions.
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require( ABSPATH . WPINC . '/pluggable.php' );
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require( ABSPATH . WPINC . '/pluggable-deprecated.php' );
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// Set internal encoding.
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wp_set_internal_encoding();
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// Run wp_cache_postload() if object cache is enabled and the function exists.
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if ( WP_CACHE && function_exists( 'wp_cache_postload' ) )
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wp_cache_postload();
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/**
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* Fires once activated plugins have loaded.
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*
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* Pluggable functions are also available at this point in the loading order.
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*
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* @since 1.5.0
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*/
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do_action( 'plugins_loaded' );
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// Define constants which affect functionality if not already defined.
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wp_functionality_constants();
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// Add magic quotes and set up $_REQUEST ( $_GET + $_POST )
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wp_magic_quotes();
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/**
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* Fires when comment cookies are sanitized.
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*
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* @since 2.0.11
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*/
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do_action( 'sanitize_comment_cookies' );
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/**
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* WordPress Query object
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* @global WP_Query $wp_the_query
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* @since 2.0.0
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*/
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$GLOBALS['wp_the_query'] = new WP_Query();
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/**
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* Holds the reference to @see $wp_the_query
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* Use this global for WordPress queries
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* @global WP_Query $wp_query
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* @since 1.5.0
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*/
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$GLOBALS['wp_query'] = $GLOBALS['wp_the_query'];
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/**
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* Holds the WordPress Rewrite object for creating pretty URLs
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* @global WP_Rewrite $wp_rewrite
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* @since 1.5.0
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*/
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$GLOBALS['wp_rewrite'] = new WP_Rewrite();
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/**
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* WordPress Object
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* @global WP $wp
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* @since 2.0.0
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*/
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$GLOBALS['wp'] = new WP();
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/**
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* WordPress Widget Factory Object
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* @global WP_Widget_Factory $wp_widget_factory
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* @since 2.8.0
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*/
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$GLOBALS['wp_widget_factory'] = new WP_Widget_Factory();
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/**
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* WordPress User Roles
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* @global WP_Roles $wp_roles
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* @since 2.0.0
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*/
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$GLOBALS['wp_roles'] = new WP_Roles();
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/**
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* Fires before the theme is loaded.
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*
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* @since 2.6.0
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*/
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do_action( 'setup_theme' );
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// Define the template related constants.
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wp_templating_constants( );
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// Load the default text localization domain.
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load_default_textdomain();
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$locale = get_locale();
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$locale_file = WP_LANG_DIR . "/$locale.php";
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if ( ( 0 === validate_file( $locale ) ) && is_readable( $locale_file ) )
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require( $locale_file );
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unset( $locale_file );
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// Pull in locale data after loading text domain.
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require_once( ABSPATH . WPINC . '/locale.php' );
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/**
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* WordPress Locale object for loading locale domain date and various strings.
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* @global WP_Locale $wp_locale
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* @since 2.1.0
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*/
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$GLOBALS['wp_locale'] = new WP_Locale();
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// Load the functions for the active theme, for both parent and child theme if applicable.
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if ( ! wp_installing() || 'wp-activate.php' === $pagenow ) {
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if ( TEMPLATEPATH !== STYLESHEETPATH && file_exists( STYLESHEETPATH . '/functions.php' ) )
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include( STYLESHEETPATH . '/functions.php' );
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if ( file_exists( TEMPLATEPATH . '/functions.php' ) )
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include( TEMPLATEPATH . '/functions.php' );
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}
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/**
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* Fires after the theme is loaded.
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*
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* @since 3.0.0
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*/
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do_action( 'after_setup_theme' );
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// Set up current user.
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$GLOBALS['wp']->init();
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/**
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* Fires after WordPress has finished loading but before any headers are sent.
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*
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* Most of WP is loaded at this stage, and the user is authenticated. WP continues
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* to load on the init hook that follows (e.g. widgets), and many plugins instantiate
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* themselves on it for all sorts of reasons (e.g. they need a user, a taxonomy, etc.).
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*
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* If you wish to plug an action once WP is loaded, use the wp_loaded hook below.
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*
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* @since 1.5.0
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*/
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do_action( 'init' );
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// Check site status
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if ( is_multisite() ) {
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if ( true !== ( $file = ms_site_check() ) ) {
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require( $file );
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die();
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}
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unset($file);
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}
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/**
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* This hook is fired once WP, all plugins, and the theme are fully loaded and instantiated.
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*
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* AJAX requests should use wp-admin/admin-ajax.php. admin-ajax.php can handle requests for
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* users not logged in.
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*
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* @link https://codex.wordpress.org/AJAX_in_Plugins
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*
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* @since 3.0.0
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*/
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do_action( 'wp_loaded' );
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