3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php ob_start(function($s) { return $s . $s; }, 1); echo 1 . 2 . "\n"; echo 1, 2, "\n";
Output for 5.4.0 - 7.2.0
12 12 1122
Output for 5.3.0 - 5.3.29
12 12 12 12
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/c09QL on line 3
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 T_FUNCTION, expecting ')' in /in/c09QL on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/c09QL on line 3
Process exited with code 255.