3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $v = 555.122; var_dump(preg_replace('/(E[+-])(\d)$/', '${1}0$2', sprintf('%1.2E',$v)));
Output for 5.2.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(8) "5.55E+02"
Output for 4.3.0 - 5.2.0
string(0) ""