3v4l.org

run code in 300+ PHP versions simultaneously
<?php <?php echo b'test'; ?>
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.22
Parse error: syntax error, unexpected '<' in /in/Im5r4 on line 3
Process exited with code 255.
preferences:
184.15 ms | 1399 KiB | 58 Q