3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function g($x=0){static$s;return $x?$s.$x:[$s='g',function($y=0){return g($y);}][1];} // g()('al'); $x=g();echo $x('al'); /* echo g('al') , PHP_EOL; echo g()('al') , PHP_EOL; echo g()()('al') , PHP_EOL; echo g()()()('al') , PHP_EOL; */
based on sodnb
Output for 5.5.0 - 7.1.0
gal
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.4.45
Parse error: syntax error, unexpected '[' in /in/biL3S on line 2
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/biL3S on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/biL3S on line 2
Process exited with code 255.