Search in array value with partial match

gistfile1.php

<?php

/**
* Seach in array value, similar to in_array(), but has ability to search with partial match
* @param string $needle searched value
* @param array $haystack target array
* @param string $return_key if third parameter is set to TRUE, the function will return array key
* @return boolean|int|string if found, function will return TRUE,  string or int of first founded key (if return_key set to TRUE)
*		  otherwise FALSE
*/
function search_word_in_array($needle, $haystack, $return_key = FALSE) {
	if (empty($needle) || empty($haystack)) {
		return FALSE;
	}
	foreach ($haystack as $key => $value) {
		// strpos return position (can be 0) if found, use !== to check type
		if (strpos(strtolower($value), strtolower($needle)) !== FALSE) {
			if ($return_key) {
				return $key;
			}
			return TRUE;
		}
	}
	return FALSE;
}