3v4l.org

run code in 500+ PHP versions simultaneously
<?php $_POST['action'] = 'abc123'; $action = $_POST['action'] ?? 'default'; echo 'Original: ' . $action . PHP_EOL; unset($action); if (isset($_POST['action'])) { $action = 'default'; } else { $action = $_POST['action']; } echo 'Incorrect: ' . $action . PHP_EOL; unset($action); if (isset($_POST['action'])) { $action = $_POST['action']; } else { $action = 'default'; } echo 'Correct: ' . $action;
Output for 5.6.0 - 5.6.24
Parse error: syntax error, unexpected '?' in /in/H3V7m on line 5
Process exited with code 255.
Output for 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Original: abc123 Incorrect: default Correct: abc123
preferences:
29.56 ms | 1140 KiB | 9 Q