pre_attachment_url_to_postid │ хук-фильтр │ WP 1.0

Filters the attachment ID to allow short-circuit the function.

Allows plugins to short-circuit attachment ID lookups. Plugins making use of this function should return:

• 0 (integer) to indicate the attachment is not found,
• attachment ID (integer) to indicate the attachment ID found,
• null to indicate WordPress should proceed with the lookup.

Warning: The post ID may be null or zero, both of which cast to a boolean false. For information about casting to booleans see the PHP documentation. Use the === operator for testing the post ID when developing filters using this hook.

Использование

add_filter( 'pre_attachment_url_to_postid', 'wp_kama_pre_attachment_url_to_postid_filter', 10, 2 );

/**
 * Function for `pre_attachment_url_to_postid` filter-hook.
 * 
 * @param int|null $post_id The result of the post ID lookup. Null to indicate no lookup has been attempted.
 * @param string   $url     The URL being looked up.
 *
 * @return int|null
 */
function wp_kama_pre_attachment_url_to_postid_filter( $post_id, $url ){

	// filter...
	return $post_id;
}

$post_id(int|null)

The result of the post ID lookup. Null to indicate no lookup has been attempted.
По умолчанию: null

$url(строка)

The URL being looked up.

Где вызывается хук

$post_id = apply_filters( 'pre_attachment_url_to_postid', null, $url );

Где используется хук в WordPress