registered_meta_key_exists

函数



      registered_meta_key_exists ( $object_type, $meta_key, $object_subtype = '' )

参数

(string)
$object_type
Type of object metadata is for. Accepts ‘post’, ‘comment’, ‘term’, ‘user’, or any other object type with an associated meta table.
Required: 是
(string)
$meta_key
Metadata key.
Required: 是
(string)
$object_subtype
Optional. The subtype of the object type.
Required: 否

Default: (empty)

返回值

(bool) True if the meta key is registered to the object type and, if provided, the object subtype. False if not.

定义位置

wp-includes/meta.php
, line 1587

引入: 4.6.0

弃用: –

Checks if a meta key is registered.

function registered_meta_key_exists( $object_type, $meta_key, $object_subtype = '' ) {
	$meta_keys = get_registered_meta_keys( $object_type, $object_subtype );

	return isset( $meta_keys[ $meta_key ] );
}

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