3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php // Positive numbers: $res5[0][0]="tag1,tag10,tag11,tag13,tag15,tag17,tag19,tag20,tag4,tag9,tag8,tag7,tag6,tag5,tag3,tag2,tag18,tag16,tag14,tag12"; if (strpos($res5[0][0], 'tag') !== false) { $str1=substr($res5[0][0],0,3); $str2=preg_replace("/tag/","",substr($res5[0][0],3)); echo $str1.$str2; } ?>
Output for 4.3.0 - 7.2.0
tag1,10,11,13,15,17,19,20,4,9,8,7,6,5,3,2,18,16,14,12