Sort by specific key

gistfile1.php

function subval_sort($a,$subkey) {
	foreach($a as $k=>$v) {
		$b[$k] = strtolower($v[$subkey]);
	}
	asort($b);
	foreach($b as $key=>$val) {
		$c[] = $a[$key];
	}
	return array_reverse($c);
}

// usage
  subval_sort($myArray, 'theKey');