3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define("T1","one"); define("T2","two"); $test='number %2$s'; $test=sprintf($test, T1,T2); echo $test;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
number two