javascript - json_encode on a PHP array returns a string -

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i've searched through site , can't see question quite mine hope isn't copy.

so i've got php script supposed return json array ajax, , want use array generate url.

however, though i'm pretty sure i've got array on php end, when json_encode i'm getting simple string out on other end.

php code:

    $n = 10;     $all_titles = array();      while($row = mysqli_fetch_array($result)) {         $title = trim($row['job title']);         if(array_key_exists($title, $all_titles)) {             ++$all_titles[$title];         } else {             $all_titles[$title] = 1;         }     }      arsort($all_titles);     $top_titles = array_slice($all_titles, 0, $n);     $title_list = array();      foreach (array_values($top_titles) $key => $val) {         array_push($title_list, array_keys($top_titles)[$key]);     }     echo json_encode($title_list);

these array operations seem working far, based on other tests i've done, i'm pretty sure $title_list array.

here js:

    xmlhttp.onreadystatechange=function() {       if (xmlhttp.readystate==4 && xmlhttp.status==200) {         alert("generated url: " + url_gen(xmlhttp.responsetext));       }     }

and problem arises:

function url_gen(list) {     var url = list[2];     return url; }

i have varied number in list[#] (list[0], list[1], etc.) , each 1 character, meaning list (which passed in onreadystatechange responsetext php function above) string, not json array.

any suggestions?

that's does. returns string. need parse on client side.

alert("generated url: " + url_gen(json.parse(xmlhttp.responsetext)));

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