3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "{K]X^\31\31EYG_Q\31" ^ (string) M_PI;
Output for 5.6.0 - 5.6.27, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Hello, world!
preferences:
78.82 ms | 407 KiB | 5 Q