get_metadata_by_mid

函数



      get_metadata_by_mid ( $meta_type, $meta_id )

参数

(string)
$meta_type
Type of object metadata is for. Accepts ‘post’, ‘comment’, ‘term’, ‘user’, or any other object type with an associated meta table.
Required: 是
(int)
$meta_id
ID for a specific meta row.
Required: 是

返回值

(stdClass|false) { Metadata object, or boolean `false` if the metadata doesn’t exist. @type string $meta_key The meta key. @type mixed $meta_value The unserialized meta value. @type string $meta_id Optional. The meta ID when the meta type is any value except ‘user’. @type string $umeta_id Optional. The meta ID when the meta type is ‘user’. @type string $post_id Optional. The object ID when the meta type is ‘post’. @type string $comment_id Optional. The object ID when the meta type is ‘comment’. @type string $term_id Optional. The object ID when the meta type is ‘term’. @type string $user_id Optional. The object ID when the meta type is ‘user’. }

定义位置

wp-includes/meta.php
, line 787

引入: 3.3.0

弃用: –

按元ID检索元数据。

function get_metadata_by_mid( $meta_type, $meta_id ) {
	global $wpdb;

	if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) {
		return false;
	}

	$meta_id = (int) $meta_id;
	if ( $meta_id get_row( $wpdb->prepare( "SELECT * FROM $table WHERE $id_column = %d", $meta_id ) );

	if ( empty( $meta ) ) {
		return false;
	}

	if ( isset( $meta->meta_value ) ) {
		$meta->meta_value = maybe_unserialize( $meta->meta_value );
	}

	return $meta;
}

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