3v4l.org

run code in 300+ PHP versions simultaneously
<?php function d6() { return range(1,6); } $t = $i = 0; foreach(d6() as $a) { foreach(d6() as $b) { foreach(d6() as $c) { $t++; if($a==$b || $a == $c || $b == $c) { $i++; } } } } echo "$i doubles out of $t results.\n";
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 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
96 doubles out of 216 results.
preferences:
201.57 ms | 406 KiB | 313 Q