[php5.6] array_keys_exist

array_keys_exist.php

<?php

if (!function_exists('array_keys_exist')) {


	/**
	 * Checks if given keys or indexes exist in the array.
	 *
	 * @author Ozgur Giritli <ozgur@zeronights.com>
	 *
	 * @param array $array Array to check keys against.
	 * @param mixed $keys Key to check existance of.
	 * @param mixed $keys,... Additional keys to check existance of.
	 * @return boolean
	 */
	function array_keys_exist($array, ...$keys) {

		return count(array_intersect_key(array_flip($keys), $array)) === count($keys);
	}
}