Ajax code unresponsive - php

Question

Hi i am having trouble making this ajax code work with JavaScript. The function is called studentReqHandler with a button onclick function and everything is in echo's. this is the code of the function studentReqHandler:
echo "<script type='text/javascript'>
function studentReqHandler(action,id,email,elem){
_(elem).innerHTML = 'processing ...';
var ajax = ajaxObj('POST', 'verifying.php');
ajax.onreadystatechange = function() {
if(ajaxReturn(ajax) == true) {
if(ajax.responseText == 'accept_ok'){
_(elem).innerHTML = '<b>User Verified!</b><br />';
} else {
_(elem).innerHTML = ajax.responseText;
}
}
}
ajax.send('action='+action+'&id='+id+'&email='+email);
}
</script>
this is the onclick button :
<button onclick='studentReqHandler(\"accept\",\"".$id."\",\"".$email."\",\"user_info_".$id."\")'>accept</button> or
";
other ajax related functions:
function ajaxObj( meth, url ) {
var x = new XMLHttpRequest();
x.open( meth, url, true );
x.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
return x;
}
function ajaxReturn(x){
if(x.readyState == 4 && x.status == 200){
return true;
}
}
and last the php for this to work:
if (isset($_POST['action']) && isset($_POST['id'])&& isset($_POST['email'])){
$id = preg_replace('#[^0-9]#', '', $_POST['id']);
$email = $_POST['email'];
if($_POST['action'] == "accept"){
$sql = "UPDATE profile SET verified='1' WHERE id='$id' AND email='$email' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
mysqli_close($db_conx);
echo "accept_ok";
exit();
}
}
Can anyone figure out why this doesnt work?

Answer 1

I pasted this code and it works:
Minimum error, is you got some messy quotes in the <button> javascript string.
<?php
/* using this at the top to check what happens when it posts. */
if (isset($_POST['action']) && isset($_POST['id'])&& isset($_POST['email'])){
$id = preg_replace('#[^0-9]#', '', $_POST['id']);
$email = $_POST['email'];
if($_POST['action'] == "accept"){
/* I commented out the query, so you must make sure that works right */
$sql = "UPDATE profile SET verified='1' WHERE id='$id' AND email='$email' LIMIT 1";
//$query = mysqli_query($db_conx, $sql);
// mysqli_close($db_conx);
echo "accept_ok";
exit();
}
}
/* some default values. You need to make sure you get these from somewhere.*/
$id=3;
$email="oo#oooo.com";
/* ELEMENT changes when I click the button */
echo "Div Element <div id='element'>ELEMENT</div> area<br><br>";
?>
<script type='text/javascript'>
function studentReqHandler(action,id,email,elem) {
/* I used the basic document element locator */
document.getElementById('element').innerHTML = 'processing ...';
/* I posted to itself this time. */
var ajax = ajaxObj('POST', 'ajax.php');
ajax.onreadystatechange = function() {
if(ajaxReturn(ajax) == true) {
if(ajax.responseText == 'accept_ok'){
document.getElementById('element').innerHTML = '<b>User Verified!</b><br />';
} else {
document.getElementById('element').innerHTML = ajax.responseText;
}
}
}
ajax.send('action='+action+'&id='+id+'&email='+email);
}
function ajaxObj( meth, url ) {
var x = new XMLHttpRequest();
x.open( meth, url, true );
x.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
return x;
}
function ajaxReturn(x){
if(x.readyState == 4 && x.status == 200){
return true;
}
}
</script>
/* There were too many quotes and \'s in the original button. */
<br>The Button<br>
<?php
echo "<button onclick=\"studentReqHandler('accept','$id','$email','user_info_$id') \">accept</button>";
?>