Recursively search array for value.

helpers.php

<?php
/**
 * Recursively check multidimentional array for value
 *
 * @param string|int $needle The searched value.
 * @param array $haystack The array.
 * @param boolean $strict If the third parameter strict is set to TRUE then the in_array() function will also check the types of the needle in the haystack.
 *
 * @return boolean haystack has needle.
 */
function in_array_r( $needle, $haystack, $strict = false ) {
	foreach ( $haystack as $item ) {
			if (
				( $strict ? $item === $needle : $item == $needle )
				|| (
					is_array( $item )
					&& in_array_r($needle, $item, $strict )
				)
			) {
					return true;
			}
	}

	return false;
}