3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isEqual($value, &$a = null, &$b = null) { $a = $value; $b = 1; return $a == $b; } $force = true; for($i=0; $i<3; $i++) { if (isEqual($i, $a, $b) || $force) { echo $i . PHP_EOL; } }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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
0 1 2
preferences:
141.28 ms | 404 KiB | 181 Q