3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(&$bar = []) { $bar[] = 'foo'; } foo($bar); var_dump($bar);
Output for 5.4.0 - 7.1.0
array(1) { [0]=> string(3) "foo" }
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Gf6Uu on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Gf6Uu on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '=', expecting ')' in /in/Gf6Uu on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '=', expecting ')' in /in/Gf6Uu on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Gf6Uu on line 3
Process exited with code 255.