populate_site_meta( int $site_id, array $meta = array() )

Compatibility

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

Parameters

$site_idint

Site ID to populate meta for.

$metaarrayoptional

Custom meta $key => $value pairs to use. Default empty array.Default: array()

Performance profile

How much work a call to populate_site_meta() 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 ->query().

Scaling

Scales with input

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

Instructions

9–35

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 55.

Plugin surface

1 hook

Third-party callbacks on 'populate_site_meta' 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
• cacheobject cachewp_cache_delete()called directly
• sqldatabase query->query()called directly
• optionnetwork optionget_network_option()one call below populate_site_meta()

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

Hooks and filters fired · 1

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

1. 1
   apply_filters( populate_site_meta )filterline 1405 (+21 into the body)

   Filters meta for a site on creation.

Uses · 4

• is_site_meta_supported()Determines whether site meta is enabled.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• wp_cache_delete()Removes the cache contents matching key and group.
• wp_cache_set_sites_last_changed()Sets the last changed time for the 'sites' cache group.

Used by · 1

• wp_initialize_site()Runs the initialization routine for a given site.

Source code

View on Trac ↗View on GitHub ↗

1384function populate_site_meta( $site_id, array $meta = array() ) {1385	global $wpdb;1386 1387	$site_id = (int) $site_id;1388 1389	if ( ! is_site_meta_supported() ) {1390		return;1391	}1392 1393	if ( empty( $meta ) ) {1394		return;1395	}1396 1397	/**1398	 * Filters meta for a site on creation.1399	 *1400	 * @since 5.2.01401	 *1402	 * @param array $meta    Associative array of site meta keys and values to be inserted.1403	 * @param int   $site_id ID of site to populate.1404	 */1405	$site_meta = apply_filters( 'populate_site_meta', $meta, $site_id );1406 1407	$insert = '';1408	foreach ( $site_meta as $meta_key => $meta_value ) {1409		if ( is_array( $meta_value ) ) {1410			$meta_value = serialize( $meta_value );1411		}1412		if ( ! empty( $insert ) ) {1413			$insert .= ', ';1414		}1415		$insert .= $wpdb->prepare( '( %d, %s, %s)', $site_id, $meta_key, $meta_value );1416	}1417 1418	$wpdb->query( "INSERT INTO $wpdb->blogmeta ( blog_id, meta_key, meta_value ) VALUES " . $insert ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared1419 1420	wp_cache_delete( $site_id, 'blog_meta' );1421	wp_cache_set_sites_last_changed();1422}

Changelog

Introduced in 5.1.0. 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 7.1.0 tag, from src/wp-admin/includes/schema.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.