post_tags_meta_box( WP_Post $post, array $box )

Compatibility

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

Parameters

$postWP_Post

Current post object.

$boxarray

Tags meta box arguments.

• $idstring

  Meta box 'id' attribute.

• $titlestring

  Meta box title.

• $callbackcallable

  Meta box display callback.

• $argsarray

  { Extra meta box arguments.

• $taxonomystringdefault: 'post_tag'. }

  Taxonomy.

Performance profile

How much work a call to post_tags_meta_box() 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

Reaches the database via wp_get_object_terms().

Scaling

Constant

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

Instructions

80–115

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 123.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

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

What it touches

• hookthird-party callbacksapply_filters()one call below post_tags_meta_box()
• querycontent querywp_get_object_terms()one call below post_tags_meta_box()
• cacheobject cachewp_cache_add()one call below post_tags_meta_box()

Further down the call graph this can also reach option, 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 post_tags_meta_box() can have, taken from its control-flow graph on PHP 8.5.

Uses · 8

• wp_parse_args()Merges user defined arguments into defaults array.
• esc_attr()Escaping for HTML attributes.
• get_taxonomy()Retrieves the taxonomy object of $taxonomy.
• current_user_can()Returns whether the current user has the specified capability.
• _x()Retrieves translated string with gettext context.
• get_terms_to_edit()Gets comma-separated list of terms available to edit for the given post ID.
• disabled()Outputs the HTML disabled attribute.
• esc_attr_e()Displays translated text that has been escaped for safe use in an attribute.

Source code

View on Trac ↗View on GitHub ↗

572function post_tags_meta_box( $post, $box ) {573	$defaults = array( 'taxonomy' => 'post_tag' );574	if ( ! isset( $box['args'] ) || ! is_array( $box['args'] ) ) {575		$args = array();576	} else {577		$args = $box['args'];578	}579	$parsed_args           = wp_parse_args( $args, $defaults );580	$tax_name              = esc_attr( $parsed_args['taxonomy'] );581	$taxonomy              = get_taxonomy( $parsed_args['taxonomy'] );582	$user_can_assign_terms = current_user_can( $taxonomy->cap->assign_terms );583	$comma                 = _x( ',', 'tag delimiter' );584	$terms_to_edit         = get_terms_to_edit( $post->ID, $tax_name );585	if ( ! is_string( $terms_to_edit ) ) {586		$terms_to_edit = '';587	}588	?>589<div class="tagsdiv" id="<?php echo $tax_name; ?>">590	<div class="jaxtag">591	<div class="nojs-tags hide-if-js">592		<label for="tax-input-<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_or_remove_items; ?></label>593		<p><textarea name="<?php echo "tax_input[$tax_name]"; ?>" rows="3" cols="20" class="the-tags" id="tax-input-<?php echo $tax_name; ?>" <?php disabled( ! $user_can_assign_terms ); ?> aria-describedby="new-tag-<?php echo $tax_name; ?>-desc"><?php echo str_replace( ',', $comma . ' ', $terms_to_edit ); // textarea_escaped by esc_attr() ?></textarea></p>594	</div>595	<?php if ( $user_can_assign_terms ) : ?>596	<div class="ajaxtag hide-if-no-js">597		<label class="screen-reader-text" for="new-tag-<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_new_item; ?></label>598		<input data-wp-taxonomy="<?php echo $tax_name; ?>" type="text" id="new-tag-<?php echo $tax_name; ?>" name="newtag[<?php echo $tax_name; ?>]" class="newtag form-input-tip" size="16" autocomplete="off" aria-describedby="new-tag-<?php echo $tax_name; ?>-desc" value="" />599		<input type="button" class="button tagadd" value="<?php esc_attr_e( 'Add' ); ?>" />600	</div>601	<p class="howto" id="new-tag-<?php echo $tax_name; ?>-desc"><?php echo $taxonomy->labels->separate_items_with_commas; ?></p>602	<?php elseif ( empty( $terms_to_edit ) ) : ?>603		<p><?php echo $taxonomy->labels->no_terms; ?></p>604	<?php endif; ?>605	</div>606	<ul class="tagchecklist" role="list"></ul>607</div>608	<?php if ( $user_can_assign_terms ) : ?>609<p class="hide-if-no-js"><button type="button" class="button-link tagcloud-link" id="link-<?php echo $tax_name; ?>" aria-expanded="false"><?php echo $taxonomy->labels->choose_from_most_used; ?></button></p>610<?php endif; ?>611	<?php612}

Changelog

Introduced in 2.6.0. 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 7.1.0 tag, from src/wp-admin/includes/meta-boxes.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.