3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f($req, $opt = null) { printf('$req: %d; $opt: %d."\n", $req, $opt); } f(1); f(1, 2); ?>
Output for 5.4.0 - 5.4.24
Parse error: syntax error, unexpected ''$req: %d; $opt: %d."\n",' (T_ENCAPSED_AND_WHITESPACE), expecting ')' in /in/q20BT on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting ')' in /in/q20BT on line 3
Process exited with code 255.