3v4l.org

run code in 500+ PHP versions simultaneously
<?php $i = "instructions and recipes"; if (strrpos($i, "instr") !== false) { print 1; }
Output for 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
1
preferences:
108.8 ms | 1512 KiB | 4 Q