3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php // Concat $a = 'Hello '; $b = 'World!'; $out = $a . $b; echo $out; $out2 = printf("%s%s", $a, $b); echo $out2;
Output for 4.3.7 - 7.1.0
Hello World!Hello World!12
Output for 4.3.0 - 4.3.6
Hello World!Hello World!