WP_MS_Themes_List_Table::prepare_items()

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Performance profile

How much work a call to WP_MS_Themes_List_Table::prepare_items() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Heavy

Reads stored settings via get_site_option(), cached per request but not free on a cold cache.

Scaling

Scales with input

The body loops, so the work grows with how much data it finds.

Instructions

102–164

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 335.

Plugin surface

1 hook

Third-party callbacks on 'all_themes' run inside this call, and their cost is not bounded by anything here.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• hookthird-party callbacksapply_filters()called directly
• optionnetwork optionget_site_option()called directly
• transienttransientget_site_transient()called directly
• cacheobject cachewp_cache_get()one call below WP_MS_Themes_List_Table::prepare_items()

Further down the call graph this can also reach serialize and query. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 24 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_MS_Themes_List_Table::prepare_items() can have, taken from its control-flow graph on PHP 8.5.

This body has more branch combinations than are worth enumerating, so the table covers the outcomes found first rather than every one that exists.

Hooks and filters fired · 1

One hook fires while WP_MS_Themes_List_Table::prepare_items() runs, in this order:

1. 1
   apply_filters( all_themes )filterline 121 (+16 into the body)

   Filters the full array of WP_Theme objects to list in the Multisite themes list table.

Uses · 12

• sanitize_text_field()Sanitizes a string from user input or from the database.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• wp_get_themes()Returns an array of WP_Theme objects based on the arguments.
• get_site_option()Retrieve an option value for the current network based on name of option.
• get_site_transient()Retrieves the value of a site transient.
• current_user_can()Returns whether the current user has the specified capability.
• wp_is_auto_update_forced_for_item()Checks whether auto-updates are forced for an item.
• wp_localize_script()Localizes a script.
• wp_get_update_data()Collects counts and UI strings for available updates.
• WP_MS_Themes_List_Table::get_items_per_page()
• WP_Theme::sort_by_name()Sorts themes by name.
• WP_MS_Themes_List_Table::set_pagination_args()

Source code

View on Trac ↗View on GitHub ↗

105	public function prepare_items() {106		global $status, $totals, $page, $orderby, $order, $s;107 108		$orderby = ! empty( $_REQUEST['orderby'] ) ? sanitize_text_field( $_REQUEST['orderby'] ) : '';109		$order   = ! empty( $_REQUEST['order'] ) ? sanitize_text_field( $_REQUEST['order'] ) : '';110		$s       = ! empty( $_REQUEST['s'] ) ? sanitize_text_field( $_REQUEST['s'] ) : '';111 112		$themes = array(113			/**114			 * Filters the full array of WP_Theme objects to list in the Multisite115			 * themes list table.116			 *117			 * @since 3.1.0118			 *119			 * @param WP_Theme[] $all Array of WP_Theme objects to display in the list table.120			 */121			'all'      => apply_filters( 'all_themes', wp_get_themes() ),122			'search'   => array(),123			'enabled'  => array(),124			'disabled' => array(),125			'upgrade'  => array(),126			'broken'   => $this->is_site_themes ? array() : wp_get_themes( array( 'errors' => true ) ),127		);128 129		if ( $this->show_autoupdates ) {130			$auto_updates = (array) get_site_option( 'auto_update_themes', array() );131 132			$themes['auto-update-enabled']  = array();133			$themes['auto-update-disabled'] = array();134		}135 136		if ( $this->is_site_themes ) {137			$themes_per_page = $this->get_items_per_page( 'site_themes_network_per_page' );138			$allowed_where   = 'site';139		} else {140			$themes_per_page = $this->get_items_per_page( 'themes_network_per_page' );141			$allowed_where   = 'network';142		}143 144		$current      = get_site_transient( 'update_themes' );145		$maybe_update = current_user_can( 'update_themes' ) && ! $this->is_site_themes && $current;146 147		foreach ( (array) $themes['all'] as $key => $theme ) {148			if ( $this->is_site_themes && $theme->is_allowed( 'network' ) ) {149				unset( $themes['all'][ $key ] );150				continue;151			}152 153			if ( $maybe_update && isset( $current->response[ $key ] ) ) {154				$themes['all'][ $key ]->update = true;155				$themes['upgrade'][ $key ]     = $themes['all'][ $key ];156			}157 158			$filter                    = $theme->is_allowed( $allowed_where, $this->site_id ) ? 'enabled' : 'disabled';159			$themes[ $filter ][ $key ] = $themes['all'][ $key ];160 161			$theme_data = array(162				'update_supported' => $theme->update_supported ?? true,163			);164 165			// Extra info if known. array_merge() ensures $theme_data has precedence if keys collide.166			if ( isset( $current->response[ $key ] ) ) {167				$theme_data = array_merge( (array) $current->response[ $key ], $theme_data );168			} elseif ( isset( $current->no_update[ $key ] ) ) {169				$theme_data = array_merge( (array) $current->no_update[ $key ], $theme_data );170			} else {171				$theme_data['update_supported'] = false;172			}173 174			$theme->update_supported = $theme_data['update_supported'];175 176			/*177			 * Create the expected payload for the auto_update_theme filter, this is the same data178			 * as contained within $updates or $no_updates but used when the Theme is not known.179			 */180			$filter_payload = array(181				'theme'        => $key,182				'new_version'  => '',183				'url'          => '',184				'package'      => '',

Changelog

Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-admin/includes/class-wp-ms-themes-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

Something wrong on this page? Report it and it gets fixed in the next regeneration.