Ticket #36335: classes-real.php

<?php

class WP_Autoload_Prefixed {
        protected $prefix;
        protected $path;
        public function __construct( $prefix, $path ) {
                $this->prefix = strtolower( $prefix );
                $this->path = trailingslashit( $path );
        }
        public function load_class( $class ) {
                $class = strtolower( $class );
                if ( strpos( $class, $this->prefix ) !== 0 ) {
                        return;
                }

                $filename = 'class-' . str_replace( '_', '-', $class ) . '.php';
                include $this->path . $filename;
        }
}
class WP_Autoload_PSR0 {
        protected $prefix;
        protected $path;
        public function __construct( $prefix, $path ) {
                $this->prefix = $prefix;
                $this->path = trailingslashit( $path );
        }
        public function load_class( $class ) {
                if ( strpos( $class, $this->prefix ) !== 0 ) {
                        return;
                }

                $parts = explode( '_', substr( $class, strlen( $this->prefix ) ) );
                $filename = implode( '/', $parts ) . '.php';
                include $this->path . $filename;
        }
}
class WP_Autoload_ClassMap {
        protected $map;
        public function __construct( $map ) {
                $this->map = $map;
        }
        public function load_class( $class ) {
                if ( ! isset( $this->map[ $class ] ) ) {
                        return;
                }

                require $this->map[ $class ];
        }
}

// Legacy
$legacy_map = new WP_Autoload_ClassMap([
        'WP' => 'wp-includes/class-wp.php',
        'wpdb' => 'wp-includes/wp-db.php',
        'WP_Date_Query' => 'wp-includes/date.php',
        'WP_Locale' => 'wp-includes/locale.php',
        'WP_oEmbed' => 'wp-includes/class-oembed.php',
        'WP_Query' => 'wp-includes/query.php',
        'WP_User_Meta_Session_Tokens' => 'wp-includes/session.php',

        // Back-compat
        'WP_HTTP_Fsockopen' => 'wp-includes/class-wp-http-streams.php',

        // Old Customizer
        'WP_Customize_Control' => 'wp-includes/class-wp-customize-control.php',
        'WP_Customize_Panel' => 'wp-includes/class-wp-customize-panel.php',
        'WP_Customize_Section' => 'wp-includes/class-wp-customize-section.php',
        'WP_Customize_Setting' => 'wp-includes/class-wp-customize-setting.php',

        // Dependencies (uses dot instead of dash)
        'WP_Dependencies' => 'wp-includes/class.wp-dependencies.php',
        '_WP_Dependency' => 'wp-includes/class.wp-dependencies.php',
        'WP_Scripts' => 'wp-includes/class.wp-scripts.php',
        'WP_Styles' => 'wp-includes/class.wp-styles.php',

        // Widgets
        'WP_Widget_Factory' => 'wp-includes/class-wp-widget-factory.php',

        // Walkers
        'Walker' => 'wp-includes/class-wp-walker.php',
        'Walker_CategoryDropdown' => 'wp-includes/class-walker-category-dropdown.php',
        'Walker_PageDropdown' => 'wp-includes/class-walker-page-dropdown.php',

        // Diff
        'WP_Text_Diff_Renderer_Table' => 'wp-includes/wp-diff.php',
        'WP_Text_Diff_Renderer_inline' => 'wp-includes/wp-diff.php',
]);
spl_autoload_register( array( $legacy_map, 'load_class' ) );

// Admin-only
$admin_map = new WP_Autoload_ClassMap([
        // List tables
        'WP_Comments_List_Table'       => 'wp-admin/includes/class-wp-comments-list-table.php',
        'WP_Links_List_Table'          => 'wp-admin/includes/class-wp-links-list-table.php',
        'WP_List_Table'                => 'wp-admin/includes/class-wp-list-table.php',
        'WP_Media_List_Table'          => 'wp-admin/includes/class-wp-media-list-table.php',
        'WP_MS_Sites_List_Table'       => 'wp-admin/includes/class-wp-ms-sites-list-table.php',
        'WP_MS_Themes_List_Table'      => 'wp-admin/includes/class-wp-ms-themes-list-table.php',
        'WP_MS_Users_List_Table'       => 'wp-admin/includes/class-wp-ms-users-list-table.php',
        'WP_Plugin_Install_List_Table' => 'wp-admin/includes/class-wp-plugin-install-list-table.php',
        'WP_Plugins_List_Table'        => 'wp-admin/includes/class-wp-plugins-list-table.php',
        'WP_Post_Comments_List_Table'  => 'wp-admin/includes/class-wp-post-comments-list-table.php',
        'WP_Posts_List_Table'          => 'wp-admin/includes/class-wp-posts-list-table.php',
        'WP_Terms_List_Table'          => 'wp-admin/includes/class-wp-terms-list-table.php',
        'WP_Theme_Install_List_Table'  => 'wp-admin/includes/class-wp-theme-install-list-table.php',
        'WP_Themes_List_Table'         => 'wp-admin/includes/class-wp-themes-list-table.php',
        'WP_Users_List_Table'          => 'wp-admin/includes/class-wp-users-list-table.php',
        '_WP_List_Table'               => 'wp-admin/includes/list-table.php',
        '_WP_List_Table_Compat'        => 'wp-admin/includes/list-table.php',

        // Skins
        'WP_Upgrader_Skin'            => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Plugin_Upgrader_Skin'        => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Bulk_Upgrader_Skin'          => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Bulk_Plugin_Upgrader_Skin'   => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Bulk_Theme_Upgrader_Skin'    => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Plugin_Installer_Skin'       => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Theme_Installer_Skin'        => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Theme_Upgrader_Skin'         => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Language_Pack_Upgrader_Skin' => 'wp-admin/includes/class-wp-upgrader-skins.php',
        'Automatic_Upgrader_Skin'     => 'wp-admin/includes/class-wp-upgrader-skins.php',

        // Upgraders
        'WP_Upgrader'            => 'wp-admin/includes/class-wp-upgrader.php',
        'Plugin_Upgrader'        => 'wp-admin/includes/class-wp-upgrader.php',
        'Theme_Upgrader'         => 'wp-admin/includes/class-wp-upgrader.php',
        'Language_Pack_Upgrader' => 'wp-admin/includes/class-wp-upgrader.php',
        'Core_Upgrader'          => 'wp-admin/includes/class-wp-upgrader.php',
        'File_Upload_Upgrader'   => 'wp-admin/includes/class-wp-upgrader.php',
        'WP_Automatic_Updater'   => 'wp-admin/includes/class-wp-upgrader.php',

        // Admin walkers
        'Walker_Category_Checklist' => 'wp-admin/includes/class-walker-category-checklist.php',
        'Walker_Nav_Menu_Checklist' => 'wp-admin/includes/class-walker-nav-menu-checklist.php',
        'Walker_Nav_Menu_Edit'      => 'wp-admin/includes/class-walker-nav-menu-edit.php',

        // Others!
        'Custom_Background'   => 'wp-admin/custom-background.php',
        'Custom_Image_Header' => 'wp-admin/custom-header.php',
        'WP_Importer'         => 'wp-admin/includes/class-wp-importer.php',
        'WP_Press_This'       => 'wp-admin/includes/class-wp-press-this.php',
        'WP_Site_Icon'        => 'wp-admin/includes/class-wp-site-icon.php',
]);
spl_autoload_register( array( $admin_map, 'load_class' ) );

// Externals
$external_map = new WP_Autoload_ClassMap([
        // AtomLib
        'AtomFeed' => 'wp-includes/atomlib.php',
        'AtomEntry' => 'wp-includes/atomlib.php',
        'AtomParser' => 'wp-includes/atomlib.php',

        // FTP handling
        'ftp' => 'wp-admin/includes/class-ftp.php',
        'ftp_base' => 'wp-admin/includes/class-ftp.php',

        // IXR
        'IXR_Value' => 'wp-includes/class-IXR.php',
        'IXR_Date' => 'wp-includes/class-IXR.php',

        // Magpie
        'MagpieRSS' => 'wp-includes/rss.php',
        'RSSCache' => 'wp-includes/rss.php',

        // ID3
        'getid3_asf' => 'wp-includes/ID3/module.audio-video.asf.php',
        'getid3_flv' => 'wp-includes/ID3/module.audio-video.flv.php',
        'AMFStream' => 'wp-includes/ID3/module.audio-video.flv.php',
        'AMFReader' => 'wp-includes/ID3/module.audio-video.flv.php',
        'AVCSequenceParameterSetReader' => 'wp-includes/ID3/module.audio-video.flv.php',
        'getid3_riff' => 'wp-includes/ID3/module.audio-video.riff.php',

        // phpass
        'PasswordHash' => 'wp-includes/class-phpass.php',

        // POMO
        'Translation_Entry' => 'wp-includes/pomo/entry.php',
        'MO' => 'wp-includes/pomo/mo.php',
        'PO' => 'wp-includes/pomo/po.php',
        'POMO_Reader' => 'wp-includes/pomo/streams.php',
        'POMO_FileReader' => 'wp-includes/pomo/streams.php',
        'POMO_StringReader' => 'wp-includes/pomo/streams.php',
        'POMO_CachedFileReader' => 'wp-includes/pomo/streams.php',
        'POMO_CachedIntFileReader' => 'wp-includes/pomo/streams.php',
        'Translations' => 'wp-includes/pomo/translations.php',
        'Gettext_Translations' => 'wp-includes/pomo/translations.php',
        'NOOP_Translations' => 'wp-includes/pomo/translations.php',

        // POP3
        'POP3' => 'wp-includes/class-pop3.php',

        // Text_Diff
        'Text_Diff' => 'wp-includes/Text/Diff.php',
        'Text_MappedDiff' => 'wp-includes/Text/Diff.php',
        'Text_Diff_Op' => 'wp-includes/Text/Diff.php',
        'Text_Diff_Op_copy' => 'wp-includes/Text/Diff.php',
        'Text_Diff_Op_change' => 'wp-includes/Text/Diff.php',
        'Text_Diff_Op_delete' => 'wp-includes/Text/Diff.php',
        'Text_Diff_Op_add' => 'wp-includes/Text/Diff.php',
]);
spl_autoload_register( array( $external_map, 'load_class' ) );

$diff = new WP_Autoload_PSR0( 'Text_Diff_', 'wp-includes/Text/Diff/' );
spl_autoload_register( array( $diff, 'load_class' ) );

$prefixed = [
        // Subdirs of includes
        'wp_customize_' => 'wp-includes/customize/',
        'wp_rest_' => 'wp-includes/rest-api/',
        'wp_widget_' => 'wp-includes/widgets/',

        // Admin-specific
        'wp_filesystem_' => 'wp-admin/includes/',

        // Catch-all
        'wp_' => 'wp-includes/',
        'walker_' => 'wp-includes/',
];
foreach ( $prefixed as $prefix => $path ) {
        $loader = new WP_Autoload_Prefixed( $prefix, $path );
        spl_autoload_register( array( $loader, 'load_class' ) );
}