php - $_GET JavaScript and AJAX... -

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i relatively new php , (trying to) developing first ajax code...

i trying pass attribute select several options, each option own unique attribute "values" string.

the php file gets value , (for instance prints out). , generated file returned main html page.

here source code...

here javascript:

function showuser(myelement) {      var str = myelement.options[myelement.selectedindex].getattribute("values");      if (str == "") {         document.getelementbyid("myresponse").innerhtml = "";         return;     } else {          if (window.xmlhttprequest) {             // code ie7+, firefox, chrome, opera, safari             xmlhttp = new xmlhttprequest();         } else {             // code ie6, ie5             xmlhttp = new activexobject("microsoft.xmlhttp");         }         xmlhttp.onreadystatechange = function() {         if (xmlhttp.readystate == 4 && xmlhttp.status == 200) {             document.getelementbyid("myresponse").innerhtml = xmlhttp.responsetext;             }         }         xmlhttp.open("get","getuser.php?q="+encodeuricomponent(str),true);         xmlhttp.send();     } }

my html following:

<form> <select name="users" onchange="showuser(this)">   <option values="">select person:</option>   <option values="rasmus lerdorf">creator of php</option>   <option values="linus torvalds">developed linux</option>   <option values="dennis ritchie">developper of c</option>   </select> </form> <br> <div id="myresponse"><b>person info listed here...</b></div>

my php is:

<?php $q = intval($_get['q']); echo $q; ?>

i 0 instead of text string, wrong code?

silly me,

i copied , pasted basic example tutorial , did not realize php code casting string sent on integer.

$q = intval($_get['q']);

the code should :

$q = $_get['q'];

on earlier stage of development indeed passing integer, code working.

the code returned 0 instead of error because intval of string 0 on failure.

writing down question here realized mistake...


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