3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $d = 10; echo 1 . $d . "2{$d}" . 3 . 4;
based on eQo8N
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
11021034