3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a1 = array('a1','a2', 'a3','a4'); $result=""; foreach ($a1 as $a2) { $result.=','.'"'.$a2.'"'; } echo $result;
Output for 4.3.0 - 7.2.0
,"a1","a2","a3","a4"