3v4l.org

run code in 300+ PHP versions simultaneously
<?php $d1 = array(450,420,440,430,421); $d2 = array(460,410,410,430,413,375,256,411,656); $d3 = array(430,440,470,435,434,255,198); $t = max(max($d1),max($d2),max($d3)); // $t is 656
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 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
preferences:
186.75 ms | 404 KiB | 242 Q