[RESOLVED] Getting an 'is undefined' error when working with php

[sdouble]

I've written a javascript function that checks for a php session. When there is no session, it works okay. But when there is a session, I get an "undefined" javascript error.

This is my js in question. I call sessionCheck() in body onLoad. If there is no session, I will get my alert of "it is null"

			function getUser() {
				return "<?php getSessionUser(); ?>";
			}
	
			function sessionCheck() {
				var ssuser = eval(getUser());
				if (ssuser == null) {
					alert('it is null');
				} else {
					alert(ssuser);
				}
			}

After creating the session and receiving the error, I view source to make sure that my php executed properly, and it did. The session var I'm pulling over in this case has a value of "admin" and it shows up in getUser() correctly, but I receive no alert and instead get the " 'admin' is undefined " error.

			function getUser() {
				return "admin";
			}
	
			function sessionCheck() {
				var ssuser = eval(getUser());
				if (ssuser == null) {
					alert('it is null');
				} else {
					alert(ssuser);
				}
			}

Any idea what could be causing the error? Thanks for your help.

[WolfShade]

NULL is not the same thing as ""; you are always going to return a value, whether it is "admin" or "". Remove the eval() from around the getUser() function call, I don't think you need it.

Is this inside the head of a PHP page? Or is it in a remote .js file?

[sdouble]

Thank you WolfShade. I have a habit of trying to use null everywhere and in order to use it here, I had to use eval. This was my error. I simply changed to this and all is well.

			function getUser() {
				return "<?php getSessionUser(); ?>";
			}
	
			function sessionCheck() {
				var ssuser = getUser();
				if (ssuser == "") {
					alert('it is null');
				} else {
					alert(ssuser);
				}
			}

This was inside of the head of a .php, but there was no actual php code in it except that line, I included another php file that has my php functions inside of it. Thanks again!

[WolfShade]

Glad I could help.