3v4l.org

run code in 300+ PHP versions simultaneously
<a class='but_add' href="<?php if(isset($_SESSION['user_id'])) { echo "addItem.php?add=$row[Product_ID]"; } else { echo "login.php"; } ?>"><i class='far fa-plus-square fa-s'></i> Add</a>
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
<a class='but_add' href="login.php"><i class='far fa-plus-square fa-s'></i> Add</a>
preferences:
82.92 ms | 1403 KiB | 4 Q