3v4l.org

run code in 300+ PHP versions simultaneously
<?php //Retrieve name from query string and store to a local variable $name = $_POST['name']; echo "<h3> Hello $name </h3>"; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "name" in /in/0Q58F on line 3 <h3> Hello </h3>
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Notice: Undefined index: name in /in/0Q58F on line 3 <h3> Hello </h3>
preferences:
272.2 ms | 404 KiB | 415 Q