header function not redirecting to home.php, why? - php

Question

Here i am using header function to redirect to home.php after login, but header function is not redirecting to that page. Even when i run same code on my local computer it works fine.
<?php
ob_start();
session_start();
require_once 'phpconnection.php';
// it will never let you open index(login) page if session is set
if ( isset($_SESSION['user'])!="" ) {
header("Location:home.php");
exit;
}
$error = false;
if( isset($_POST['btn-logIn']) ) {
// prevent sql injections/ clear user invalid inputs
$email = trim($_POST['email']);
$email = strip_tags($email);
$email = htmlspecialchars($email);
$pass = trim($_POST['password']);
$pass = strip_tags($pass);
$pass = htmlspecialchars($pass);
// prevent sql injections / clear user invalid inputs
if ( !filter_var($email,FILTER_VALIDATE_EMAIL) ) {
$error = true;
$errMsg = "Please enter valid email address.";
}
// if there's no error, continue to login
if (!$error) {
$res=mysql_query("SELECT userId, userfName, userlName,userPassword FROM userdata WHERE userEmail='$email'");
$row=mysql_fetch_array($res);
$count = mysql_num_rows($res); // if uname/pass correct it returns must be 1 row
if( $count == 1 && $row['userPassword']==$pass ) {
$_SESSION['user'] = $row['userId'];
header("Location:home.php");
} else {
$errMsg = "Try again...";
}
}
}
?>

Answer 1

You do not need the !="" on line 5 because isset() already checks for existence. Either its there or its not.
if (isset($_SESSION['user'])){
header("Location: home.php");
exit;
} else {
echo "something here";
}
You can use !isset() to get the opposite result as well.

Answer 2

Try your code with this code,
<?php
ob_start();
session_start();
if ( isset($_SESSION['user'])!="" ) {
header("Location:home.php");
exit;
}
require_once 'phpconnection.php';
// it will never let you open index(login) page if session is set
?>