registered_meta_key_exists( string $object_type, string $meta_key, string $object_subtype = '' ): bool

Checks if a meta key is registered.


Parameters

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

Default: ''


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Return

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


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Source

File: wp-includes/meta.php. View all references

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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Changelog

Changelog
Version Description
4.9.8 The $object_subtype parameter was added.
4.6.0 Introduced.

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