get_metadata_by_mid( string $meta_type, int $meta_id )
Retrieves metadata by meta ID.
Parameters
- $meta_type
-
(Required) Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
- $meta_id
-
(Required) ID for a specific meta row.
Return
(stdClass|false) Metadata object, or boolean false
if the metadata doesn't exist.<br>
- 'meta_key'
(string) The meta key.<br> - 'meta_value'
(mixed) The unserialized meta value.<br> - 'meta_id'
(string) Optional. The meta ID when the meta type is any value except 'user'.<br> - 'umeta_id'
(string) Optional. The meta ID when the meta type is 'user'.<br> - 'post_id'
(string) Optional. The object ID when the meta type is 'post'.<br> - 'comment_id'
(string) Optional. The object ID when the meta type is 'comment'.<br> - 'term_id'
(string) Optional. The object ID when the meta type is 'term'.<br> - 'user_id'
(string) Optional. The object ID when the meta type is 'user'.<br>
Source
File: wp-includes/meta.php
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 = intval( $meta_id );
if ( $meta_id <= 0 ) {
return false;
}
$table = _get_meta_table( $meta_type );
if ( ! $table ) {
return false;
}
$id_column = ( 'user' == $meta_type ) ? 'umeta_id' : 'meta_id';
$meta = $wpdb->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;
}
Changelog
Version | Description |
---|---|
3.3.0 | Introduced. |