WP_Themes_List_Table::display_rows()

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_Themes_List_Table::display_rows() 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

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

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

Instructions

4–5

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 240.

Plugin surface

2 hooks

Third-party callbacks on 'theme_action_links', 'theme_action_links_{$stylesheet}' run inside this call, and their cost is not bounded by anything here.

Called by

1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

• hookthird-party callbacksapply_filters()called directly

Further down the call graph this can also reach option, transient, cache, 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 · 1 distinct outcome

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

Hooks and filters fired · 2

2 hooks fire while WP_Themes_List_Table::display_rows() runs, in this order:

1. 1
   apply_filters( theme_action_links )filterline 240 (+44 into the body)

   Filters the action links displayed for each theme in the Multisite themes list table.

2. 2
   apply_filters( theme_action_links_{$stylesheet} )filterline 243 (+47 into the body)

   Filters the action links of a specific theme in the Multisite themes list table.

Uses · 12

• wp_nonce_url()Retrieves URL with nonce added to URL query.
• esc_attr()Escaping for HTML attributes.
• _x()Retrieves translated string with gettext context.
• current_user_can()Returns whether the current user has the specified capability.
• wp_customize_url()Returns a URL to load the Customizer.
• __()Retrieves the translation of $text.
• is_multisite()Determines whether Multisite is enabled.
• esc_js()Escapes single quotes, `"`, ``, `&`, and fixes line endings.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• esc_url()Checks and cleans a URL.
• _e()Displays translated text.
• theme_update_available()Check if there is an update for a theme available.

Used by · 1

• WP_Themes_List_Table::display_rows_or_placeholder()

Source code

View on Trac ↗View on GitHub ↗

196	public function display_rows() {197		$themes = $this->items;198 199		foreach ( $themes as $theme ) :200			?>201			<div class="available-theme">202			<?php203 204			$template   = $theme->get_template();205			$stylesheet = $theme->get_stylesheet();206			$title      = $theme->display( 'Name' );207			$version    = $theme->display( 'Version' );208			$author     = $theme->display( 'Author' );209 210			$activate_link = wp_nonce_url( 'themes.php?action=activate&amp;template=' . urlencode( $template ) . '&amp;stylesheet=' . urlencode( $stylesheet ), 'switch-theme_' . $stylesheet );211 212			$actions             = array();213			$actions['activate'] = sprintf(214				'<a href="%s" class="activatelink" aria-label="%s">%s</a>',215				$activate_link,216				/* translators: %s: Theme name. */217				esc_attr( sprintf( _x( 'Activate &#8220;%s&#8221;', 'theme' ), $title ) ),218				_x( 'Activate', 'theme' )219			);220 221			if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {222				$actions['preview'] .= sprintf(223					'<a href="%s" class="load-customize hide-if-no-customize">%s</a>',224					wp_customize_url( $stylesheet ),225					__( 'Live Preview' )226				);227			}228 229			if ( ! is_multisite() && current_user_can( 'delete_themes' ) ) {230				$actions['delete'] = sprintf(231					'<a class="submitdelete deletion" href="%s" onclick="return confirm( \'%s\' );">%s</a>',232					wp_nonce_url( 'themes.php?action=delete&amp;stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet ),233					/* translators: %s: Theme name. */234					esc_js( sprintf( __( "You are about to delete this theme '%s'\n  'Cancel' to stop, 'OK' to delete." ), $title ) ),235					__( 'Delete' )236				);237			}238 239			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */240			$actions = apply_filters( 'theme_action_links', $actions, $theme, 'all' );241 242			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */243			$actions       = apply_filters( "theme_action_links_{$stylesheet}", $actions, $theme, 'all' );244			$delete_action = isset( $actions['delete'] ) ? '<div class="delete-theme">' . $actions['delete'] . '</div>' : '';245			unset( $actions['delete'] );246 247			$screenshot = $theme->get_screenshot();248			?>249 250			<span class="screenshot hide-if-customize">251				<?php if ( $screenshot ) : ?>252					<img src="<?php echo esc_url( $screenshot . '?ver=' . $theme->version ); ?>" alt="" />253				<?php endif; ?>254			</span>255			<a href="<?php echo wp_customize_url( $stylesheet ); ?>" class="screenshot load-customize hide-if-no-customize">256				<?php if ( $screenshot ) : ?>257					<img src="<?php echo esc_url( $screenshot . '?ver=' . $theme->version ); ?>" alt="" />258				<?php endif; ?>259			</a>260 261			<h3><?php echo $title; ?></h3>262			<div class="theme-author">263				<?php264					/* translators: %s: Theme author. */265					printf( __( 'By %s' ), $author );266				?>267			</div>268			<div class="action-links">269				<ul>270					<?php foreach ( $actions as $action ) : ?>271						<li><?php echo $action; ?></li>272					<?php endforeach; ?>273					<li class="hide-if-no-js"><a href="#" class="theme-detail"><?php _e( 'Details' ); ?></a></li>274				</ul>275				<?php echo $delete_action; ?>

Changelog

Introduced in 3.1.0. 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 7.0.4 tag, from src/wp-admin/includes/class-wp-themes-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

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