WP_Metadata_Lazyloader::lazyload_meta_callback( mixed $check, int $object_id, string $meta_key, bool $single, string $meta_type )

Lazy-loads meta for queued objects.

Description

This method is public so that it can be used as a filter callback. As a rule, there is no need to invoke it directly.

Parameters

$check: (Required) The $check param passed from the 'get_*_metadata' hook.
$object_id: (Required) ID of the object metadata is for.
$meta_key: (Required) Unused.
$single: (Required) Unused.
$meta_type: (Required) Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.

Return

(mixed) In order not to short-circuit get_metadata(). Generally, this is null, but it could be another value if filtered by a plugin.

Source

File: wp-includes/class-wp-metadata-lazyloader.php

	public function lazyload_meta_callback( $check, $object_id, $meta_key, $single, $meta_type ) {
		if ( empty( $this->pending_objects[ $meta_type ] ) ) {
			return $check;
		}

		$object_ids = array_keys( $this->pending_objects[ $meta_type ] );
		if ( $object_id && ! in_array( $object_id, $object_ids, true ) ) {
			$object_ids[] = $object_id;
		}

		update_meta_cache( $meta_type, $object_ids );

		// No need to run again for this set of objects.
		$this->reset_queue( $meta_type );

		return $check;
	}

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Changelog

Changelog
Version	Description
6.3.0	Introduced.