3v4l.org

run code in 300+ PHP versions simultaneously
<?php $variable = 'toto'; $toto = 'bar'; echo $$variable, PHP_EOL; // bar
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bar
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/tR3Kp on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
bar Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/tR3Kp on line 6 PHP_EOL

preferences:
209.74 ms | 402 KiB | 327 Q