Return a variable

[The Little Guy]

Is it possible to send back some variable for me to check if a login was successful? This way I can change the navigation, if they successfully logged in, or leave it as is if they did not successfully login.

 

The two functions to create my complete AJAX:

	function getVal(){
		email = document.getElementById('email').value;
		password = document.getElementById('password').value;
		val = 'pass='+password+'&email='+email+'&processType=fastLog';
		return val;
	}
	function logUser(){
		var contentType = "application/x-www-form-urlencoded; charset=UTF-8";
		var ajaxRequest;
		try{
			ajaxRequest = new XMLHttpRequest();
		} catch (e){
			try{
				ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try{
					ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e){
					alert("Your Browser Doesn't support AJAX.");
					return false;
				}
			}
		}
		ajaxRequest.onreadystatechange = function(){
			if(ajaxRequest.readyState < 4){
				document.getElementById('loginForm').innerHTML = 'Logging in...';
			}
			if(ajaxRequest.readyState == 4){
				document.getElementById('loginForm').innerHTML = ajaxRequest.responseText;
				document.getElementById('loginForm').style.display = 'block';
			}
		}
		va = getVal();
		ajaxRequest.open("POST", '/includes/process/checkLogin', true);
		ajaxRequest.setRequestHeader("Content-Type", contentType);
		ajaxRequest.send(va);
	}

 

 

The PHP to check if this is a good login:

<?php
include '../include.php';
if(!isLogged()){
	$email = addslashes($_POST['email']);
	$pass = addslashes($_POST['pass']);
	$sql = mysqli_query($db,"SELECT * FROM users WHERE `email`='$email' AND `password`=PASSWORD('$pass')")or die(mysqli_error($db));
	$row = mysqli_fetch_array($sql);
	if($row){
		if($row['activations'] == 'inactive'){
			$_SESSION['logged'] = FALSE;
			$_SESSION['message'] = 'This account has not been activated yet.';
			header("Location: http://publicsize.com");
			exit;
		}else{
			$_SESSION['logged'] = TRUE;
			$_SESSION['id'] = $row['id'];
			$_SESSION['first'] = stripslashes($row['fname']);
			$_SESSION['last'] = stripslashes($row['lname']);
			$_SESSION['email'] = stripslashes($row['email']);
			$_SESSION['date'] = stripslashes($row['date']);
			$_SESSION['gender'] = stripslashes($row['gender']);
			if($row['birthDate']!=NULL){
				$_SESSION['bday'] = stripslashes($row['birthDate']);
			}
			if($row['displayName']!= NULL){
				$_SESSION['displayName'] = stripslashes($row['displayName']);
			}else{
				$_SESSION['displayName'] = NULL;
			}
			if(isset($_SESSION['message'])){
				unset($_SESSION['message']);
			}
			mysqli_query($db,"UPDATE users SET lastLogin = '$date', onlineStatus = '1', `lastAccess` = UNIX_TIMESTAMP(NOW()) WHERE id = '{$_SESSION['id']}'")or die(mysqli_error($db));
			if($_POST['processType'] == 'fastLog'){
				echo 'Logged in as: <strong>';
				if($_SESSION['displayName'] == NULL){
					echo $_SESSION['first'];
				}else{
					echo $_SESSION['displayName'];
				}
				echo'</strong>';
				$testvar = 'I can read';
			}else{
				header("Location: http://publicsize.com");
				exit;
			}
		}
	}else{
		if($_POST['processType'] == 'fastLog'){
			echo '<p>Incorrect Email or Password.</p>
				<form action="javascript:logUser();" method="post">
					<p>
					Email:<br />

					<input id="email" type="text" onfocus="javascript:Look1(\'email\');" onblur="javascript:Look2(\'email\');" />
					</p>
					<p>
						Password:<br />
						<input id="password" type="password" onfocus="javascript:Look1(\'password\');" onblur="javascript:Look2(\'password\');" />
					</p>
					<p>
						<input type="submit" name="submit" value="Login" />
					</p>
				</form>
			';
		}else{
			$_SESSION['message'] = 'Incorrect Email or Password.';
			header("Location: http://publicsize.com");
			exit;
		}
	}
}else{
	if($_POST['processType'] == 'fastLog'){
		echo 'Unexpected error';
	}else{
		header("Location: http://publicsize.com");
		exit;
	}
}
?>