Passing Data To External PHP File From JavaScript File

Dev Shed Forums Sponsor:

February 12th, 2013, 12:07 PM

iammat

Registered User

Join Date: Feb 2013

Posts: 2

Time spent in forums: 32 m 25 sec
Reputation Power: 0

Passing Data To External PHP File From JavaScript File

Hi Everyone

I have the following js function which is located in its own file named checkUsername.js :

Code:

function checkUsername(){
	var status = document.getElementById("usernamestatus");
	var u = document.getElementById("uname").value;
	if(u != ""){
		status.innerHTML = 'checking...';
		var hr = new XMLHttpRequest();
		hr.open("POST", "passUsername.php", true);
		hr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		hr.onreadystatechange = function() {
			if(hr.readyState == 4 && hr.status == 200) {
				status.innerHTML = hr.responseText;
			}
		}
    var v = "name2check="+u;
    hr.send(v);
	}
}

I have the following PHP file named passUsername.php which is located in the same directory as checkUsername.js

Code:

<?php

 include_once('../classes/validation.class.php');

echo 'Hello'; // Testing purposes

 
?>

It seems the data is not being sent to the PHP file from the javascript file. On the HTML page the output "Checking..." appears but then nothing else. I have tried this with all code in the same file and it works, but I really do not want to jam everything into one file.

Clearly I am calling the PHP file incorrectly in the js function, would anyone be able to tell me how I should call it?

Thanks for your time!

February 12th, 2013, 01:03 PM

Jacques1

pollyanna

Join Date: Jul 2012

Location: Germany

Posts: 1,835

Time spent in forums: 1 Month 2 Weeks 1 Day 4 h 14 m 14 sec
Reputation Power: 811

Hi,

there are no obvious errors in the code itself, so you'll have to debug the problem on your own server. Open the developer tools of your browser (F12 in Chrome) and check the JavaScript console for errors. In the "Network" tab, you can also track the POST request and see the exact status.

__________________
The 6 worst sins of security • The mystery of errors and exceptions