3v4l.org

run code in 500+ PHP versions simultaneously
<?php $var = 'hello!'; (\PHP_VERSION_ID < 80100) && $var = 'hello world!'; echo $var;
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
hello!
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, 8.0.0 - 8.0.30
hello world!
Output for 5.2.7 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Cf0kf on line 4 hello world!
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Cf0kf on line 4 Notice: Use of undefined constant PHP_VERSION_ID - assumed 'PHP_VERSION_ID' in /in/Cf0kf on line 4 hello world!
preferences:
71.39 ms | 2698 KiB | 4 Q