How to get the return from php to javascript? [duplicate]

Question

Possible Duplicate:
Call php from javascript and return an array from php to Javascript function

i am having an php code for verification of User in XML

For Eg: ValLogin.php

<?php
$userName =  $_REQUEST["username"];
$password =  $_REQUEST["password"];
$iCount = 0;
$loginArray = array();
$xml = simplexml_load_file("Logintest.xml");
for ($i=0;$i<2;$i++)
{
    foreach($xml->Username[$i]->attributes() as $a => $b)
    {
        $loginArray[$iCount] = $b;
        $iCount++;
    }
    if($userName == $loginArray[0] && $password == $loginArray[1])
    {
        header("Location: EHP_Configuration.html");
        return ;
    }
    $iCount = 0;
}
echo "<SCRIPT LANGUAGE='javascript'>alert('asd')</SCRIPT>";
header("Location: Login.html");
?>

HTML

<form method = "post" action = "ValLogin.php">
</form>

echo does not work as expected. it directly shows redirect to Login

How can i get the message invalid username/Login?

Can you please also provide an example of Logintest.xml? Amongst other things the way you iterate through the xml doc seems ...odd ;-) — VolkerK
– VolkerK, Commented Oct 20, 2009 at 7:55
Logintest.xml <?xml version="1.0" encoding="ISO-8859-1"?> <Users> <Username User = "Admin" Password = "Password"/> <Username User = "Client" Password = "Client" /> </Users> — NewBie
– NewBie, Commented Oct 20, 2009 at 11:08
Extending VolkerK's note, use SimpleXMLElement::xpath() (php.net/manual/en/simplexmlelement.xpath.php) rather than looping. Looking up a user will take 1 line: $xml->xpath("//Username[@User='$username' and @Password='$password']") — outis
– outis, Commented Oct 21, 2009 at 4:14

RSeidelsohn · Accepted Answer · 2009-10-20 07:50:56Z

1

You cannot send HTML/Data before sending the header, so you'll have to send the javascript-alert inside the "Login.html".

Besides that you really should embrace your Javascript code with

<script type="text/javascript">
         alert('asd');
</script>

answered Oct 20, 2009 at 7:50

RSeidelsohn

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