3v4l.org

run code in 300+ PHP versions simultaneously
<?php function x($n) { $z="printf" for($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 5.4.0 - 5.4.12
Parse error: syntax error, unexpected 'for' (T_FOR) in /in/c7IcR on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.22
Parse error: syntax error, unexpected T_FOR in /in/c7IcR on line 4
Process exited with code 255.
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175.99 ms | 1399 KiB | 43 Q