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has_meta › WordPress Function

Since1.2.0
已弃用n/a
› has_meta ( $post_id )
参数:
  • (int) $post_id A post ID.
    Required: Yes
返回:
  • (array[]) { Array of meta data arrays for the given post ID. @type array ...$0 { Associative array of meta data. @type string $meta_key Meta key. @type mixed $meta_value Meta value. @type string $meta_id Meta ID as a numeric string. @type string $post_id Post ID as a numeric string. } }
定义在:
文档:

Returns meta data for the given post ID.



Related Functions: has_tag, has_term_meta, add_meta, the_meta, list_meta

源码 

function has_meta( $post_id ) {
	global $wpdb;

	return $wpdb->get_results(
		$wpdb->prepare(
			"SELECT meta_key, meta_value, meta_id, post_id
			FROM $wpdb->postmeta WHERE post_id = %d
			ORDER BY meta_key,meta_id",
			$post_id
		),
		ARRAY_A
	);
}