PHP find value by index in multidimensional/associative array

Following function has easily to find and retrieve value by index from multidimensional/associative array

function array_key_exists_value($searchkey, $assocarray)
{
 $output='';
    $result = array_key_exists($searchkey, $assocarray);
    if ($result)
 {
  $output =$assocarray[$searchkey];
 }
else
{ 
    foreach ($assocarray as $val) {
        if (is_array($val)) {
            $output = array_key_exists_value($searchkey, $val);
        }
    }
} 
    return $output;
}