3v4l.org

run code in 300+ PHP versions simultaneously
<?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 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
tag1,10,11,13,15,17,19,20,4,9,8,7,6,5,3,2,18,16,14,12
preferences:
276.17 ms | 406 KiB | 355 Q