3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function oddprod( $l, $h ){ $p = 1; !( $l % 2 ) or $l++; !( $h % 2 ) or $h++; while( $l <= $h ) { $p *= $l; $l += 2; } return $p;}function factorial( $n ){ $f = 1; for( $i = 1; $i < $n; $i++ ) $f *= oddprod( 3, 2 ** ($i + 1) - 1 ); return 2 ** (2 ** $n - 1) * $f;}print factorial( 15 );
based on fgj9C
Output for 5.6.7 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
INF
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.5.35
Parse error: syntax error, unexpected '*' in /in/o3cmH on line 1
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '*' in /in/o3cmH on line 1
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/o3cmH on line 1
Process exited with code 255.