3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo('"'..'files'..'"'; ?>
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.29
Parse error: syntax error, unexpected '.' in /in/tLndJ on line 2
Process exited with code 255.

preferences:
185.81 ms | 1386 KiB | 66 Q