WP_Posts_List_Table::column_cb( WP_Post $item )

Compatibility

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

Parameters

$itemWP_Post

The current WP_Post object.

Performance profile

How much work a call to WP_Posts_List_Table::column_cb() 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

Trivial

Touches nothing outside its own arguments.

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

16–46

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 46.

Plugin surface

1 hook

Third-party callbacks on 'wp_list_table_show_post_checkbox' 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

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

What one call costs · 2 distinct outcomes

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

Hooks and filters fired · 1

One hook fires while WP_Posts_List_Table::column_cb() runs, in this order:

1. 1
   apply_filters( wp_list_table_show_post_checkbox )filterline 1040 (+16 into the body)

   Filters whether to show the bulk edit checkbox for a post in its list table.

Uses · 5

• current_user_can()Returns whether the current user has the specified capability.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• the_ID()Displays the ID of the current item in the WordPress Loop.
• __()Retrieves the translation of $text.
• _draft_or_post_title()Gets the post title.

Source code

View on Trac ↗View on GitHub ↗

1024	public function column_cb( $item ) {1025		// Restores the more descriptive, specific name for use within this method.1026		$post = $item;1027 1028		$show = current_user_can( 'edit_post', $post->ID );1029 1030		/**1031		 * Filters whether to show the bulk edit checkbox for a post in its list table.1032		 *1033		 * By default the checkbox is only shown if the current user can edit the post.1034		 *1035		 * @since 5.7.01036		 *1037		 * @param bool    $show Whether to show the checkbox.1038		 * @param WP_Post $post The current WP_Post object.1039		 */1040		if ( apply_filters( 'wp_list_table_show_post_checkbox', $show, $post ) ) :1041			?>1042			<input id="cb-select-<?php the_ID(); ?>" type="checkbox" name="post[]" value="<?php the_ID(); ?>" />1043			<label for="cb-select-<?php the_ID(); ?>">1044				<span class="screen-reader-text">1045				<?php1046					/* translators: %s: Post title. */1047					printf( __( 'Select %s' ), _draft_or_post_title() );1048				?>1049				</span>1050			</label>1051			<div class="locked-indicator">1052				<span class="locked-indicator-icon" aria-hidden="true"></span>1053				<span class="screen-reader-text">1054				<?php1055				printf(1056					/* translators: Hidden accessibility text. %s: Post title. */1057					__( '&#8220;%s&#8221; is locked' ),1058					_draft_or_post_title()1059				);1060				?>1061				</span>1062			</div>1063			<?php1064		endif;1065	}

Changelog

Introduced in 4.3.0. 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 6.8.8 tag, from src/wp-admin/includes/class-wp-posts-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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