Mine

function array_keylist_exists($keylist, $haystack){ if(is_array($keylist)){  foreach($keylist as $index => $key){   if(!array_key_exists($key, $haystack)){    echo "$key does not exist in $haystack, terminating array_keylist_exists()<br />\n";    return false;   }  } } else {  echo "Wrong datatype(".gettype($keylist).") for 'array_keylist_exists();' make it an array!<br />\n";  return false; } return true;}