3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function f(&$v = 17) { $v .= 1; } $a = 5; f($a); echo $a++, PHP_EOL;
Output for 5.0.2 - 7.2.0
51
Output for 5.0.0 - 5.0.1
51 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/jp2CQ on line 3 PHP_EOL
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '=', expecting ')' in /in/jp2CQ 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/jp2CQ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/jp2CQ on line 3
Process exited with code 255.