wppaste
WordPress

post_trackback_meta_box( WP_Post $post )

Since
2.6.0
Source
wp-admin/includes/meta-boxes.php:772
Displays trackback links form fields.

Compatibility

WordPress
since 2.6.0
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

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.

Performance profile

How much work a call to post_trackback_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
Light

Touches nothing outside its own arguments.

Scaling
Scales with input

The body loops, so the work grows with what you pass in.

Instructions
37–54

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 61.

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_trackback_meta_box()

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

WhenInstructionsCalls it makes
always37–38esc_attr(), _e(), _e(), __(), __(), printf()
always52–54esc_attr(), __(), explode(), _e(), _e(), __(), __(), printf()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev6137–544
8.56137–544
8.46137–5445 fewer instructions than PHP 8.3
8.36640–594
8.26640–594
8.16640–594
7.46640–594

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Uses · 4

  • esc_attr()Escaping for HTML attributes.
  • __()Retrieves the translation of $text.
  • esc_html()Escaping for HTML blocks.
  • _e()Displays translated text.

Source code

View on Trac View on GitHub 

function post_trackback_meta_box( $post ) {	$form_trackback = '<input type="text" name="trackback_url" id="trackback_url" class="code" value="' .		esc_attr( str_replace( "\n", ' ', $post->to_ping ) ) . '" aria-describedby="trackback-url-desc" />'; 	if ( '' !== $post->pinged ) {		$pings          = '<p>' . __( 'Already pinged:' ) . '</p><ul>';		$already_pinged = explode( "\n", trim( $post->pinged ) );		foreach ( $already_pinged as $pinged_url ) {			$pings .= "\n\t<li>" . esc_html( $pinged_url ) . '</li>';		}		$pings .= '</ul>';	} 	?><p>	<label for="trackback_url"><?php _e( 'Send trackbacks to:' ); ?></label>	<?php echo $form_trackback; ?></p><p id="trackback-url-desc" class="howto"><?php _e( 'Separate multiple URLs with spaces' ); ?></p><p>	<?php	printf(		/* translators: %s: Documentation URL. */		__( 'Trackbacks are a way to notify legacy blog systems that you&#8217;ve linked to them. If you link other WordPress sites, they&#8217;ll be notified automatically using <a href="%s">pingbacks</a>, no other action necessary.' ),		__( 'https://wordpress.org/documentation/article/introduction-to-blogging/#comments' )	);	?></p>	<?php	if ( ! empty( $pings ) ) {		echo $pings;	}}

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 6.7.7 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
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