3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x=0; $c = $x++; $d = ++$x; echo "\$c: ",$c," \$d: ",$d; echo "\n\$c + \$d: ",($c + $d);
Output for 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 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
$c: 0 $d: 2 $c + $d: 2
preferences:
85.21 ms | 407 KiB | 5 Q