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Editorial Team
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Asked: 2026-05-27T00:21:53+00:00

For some reason, I keep getting XMLDoc is null, in firebug. I think that

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For some reason, I keep getting XMLDoc is null, in firebug. I think that perhaps my program isn’t parsing the XML that I am trying to generate (and that means I am likely not doing it correctly).

NOTE: I DO NOT WANT TO USE JQUERY HERE!

Here’s my code that is supposed to generate the XML code:

<?php
$con = mysql_connect("localhost", "root", "");
if (!$con)
{
    die('Could not connect: ' . mysql_error());
}
mysql_select_db("generic");
$rescult = mysql_query("SELECT * FROM culture order by cult_id");
if (!$rescult) {
    die('Invalid query: ' . mysql());
}
$row = mysql_fetch_row($rescult);
ECHO "<item>";
ECHO "<item1>" . $row[0] . "</item1>" . "<br />";
ECHO "<item2>" . $row[1] . "</item2>" . "<br />";
ECHO "</item>";
?>

And here’s my code that is supposed to parse it:

<html>
<header>
<script type="text/javascript">

if (window.XMLHttpRequest)
{   // Code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp = new XMLHttpRequest();
}
else
{   
    // Code for IE6, IE5
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","testitout2.php",false);
xmlhttp.send();
xmlDoc = xmlhttp.responseXML;

document.getElementById("item1").value =
xmlDoc.getElementsByTagName("item1")[0].childNodes[0].nodeValue;

document.getElementById("item2").value =
xmlDoc.getElementsByTagName("item2")[0].childNodes[0].nodeValue;

</script>
</header>
    <body>
        <input type="text" id="item1">
        <input type="text" id="item2">
    </body>
</html>
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1 Answer

  1. Editorial Team

    Edit: I didn’t notice the async flag. Guess my answer is irrelevant then.

    You are trying to access XML before it was even loaded.
    Set property onreadystatechange to xmlhttp:

     xmlhttp.onreadystatechange = onStateChange;

 function onStateChange() {
    if (xmlhttp.readyState != 4) return; //4 means doc is ready
    var xmlDoc = xmlhttp.responseXML;
 }
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