3v4l.org

run code in 300+ PHP versions simultaneously
<?php z="printf" function x($n) { for($i = 1; $i <= $n; $i++) { $n % $i == 0 && $i != $n ? $f[]=$i & z("$i "): 0; } array_sum($f) == $n ? z('P') : z('I'); } x(28);
Output for 5.3.0 - 5.3.22, 5.4.0 - 5.4.12
Parse error: syntax error, unexpected '=' in /in/gTofK on line 2
Process exited with code 255.
preferences:
178.78 ms | 1395 KiB | 43 Q