_validate_cache_id() │ WP 6.3.0

Checks whether the given cache ID is either an integer or an integer-like string.

Both 16 and "16" are considered valid, other numeric types and numeric strings (16.3 and "16.3") are considered invalid.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

true|false. Whether the given $object_id is a valid cache ID.

Usage

_validate_cache_id( $object_id );
$object_id(mixed) (required)
The cache ID to validate.

Changelog

Since 6.3.0 Introduced.

_validate_cache_id() code WP 6.8.1

wp-includes/functions.php 
function _validate_cache_id( $object_id ) {
	/*
	 * filter_var() could be used here, but the `filter` PHP extension
	 * is considered optional and may not be available.
	 */
	if ( is_int( $object_id )
		|| ( is_string( $object_id ) && (string) (int) $object_id === $object_id ) ) {
		return true;
	}

	/* translators: %s: The type of the given object ID. */
	$message = sprintf( __( 'Object ID must be an integer, %s given.' ), gettype( $object_id ) );
	_doing_it_wrong( '_get_non_cached_ids', $message, '6.3.0' );

	return false;
}