note 89332 added to function.is-array

Or you could make use of the array_diff_key and array_key function: <?php function is_assoc($var) { return is_array($var) && array_diff_key($var,array_keys(array_keys($var))); } function test($var) { echo is_assoc($var) ? "I'm an assoc array.\n" : "I'm not an assoc array.\n"; } // an assoc array $a = array("a"=>"aaa","b"=>1,"c"=>true); test($a); // an array $b = array_values($a); test($b); // an object $c = (object)$a; test($c); // other types test($a->a); test($a->b); test($a->c); ?> The above code outputs: I'm an assoc array. I'm not an assoc array. I'm not an assoc array. I'm not an assoc array. I'm not an assoc array. I'm not an assoc array. ---- Server IP: 216.235.13.26 Probable Submitter: 205.237.66.62 ---- Manual Page -- http://www.php.net/manual/en/function.is-array.php Edit -- https://master.php.net/note/edit/89332 Del: integrated -- https://master.php.net/note/delete/89332/integrated Del: useless -- https://master.php.net/note/delete/89332/useless Del: bad code -- https://master.php.net/note/delete/89332/bad+code Del: spam -- https://master.php.net/note/delete/89332/spam Del: non-english -- https://master.php.net/note/delete/89332/non-english Del: in docs -- https://master.php.net/note/delete/89332/in+docs Del: other reasons-- https://master.php.net/note/delete/89332 Reject -- https://master.php.net/note/reject/89332 Search -- https://master.php.net/manage/user-notes.php