标题已经在一个简单的PHP脚本中发送[重复]

Question

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I'm having issues with my simple PHP script. I want if $_SESSION['username'] is set to redirect to welcome.php, if not, it goes to /login.php I thought it would be easy but i seem to have some issues.

INDEX.php

<?php
session_start();
if(isset($_SESSION['username']))
{
  header("Location","/welcome.php");
}
else
{
  header("Location","/login.php");
}
?>

</div>

Answer 1

Add exit after you redirect to page whenever you do it with condition. Also write header function as below

<?php
session_start();
if(isset($_SESSION['username']))
{
  header("Location: /welcome.php");
  exit();
}
else
{
  header("Location: /login.php");
  exit();
}
?>