3v4l.org

run code in 300+ PHP versions simultaneously
<?php $strselvaluelist = '4|17'; $i=0; if(!empty($strselvaluelist)){ while($i < strlen($strselvaluelist)){ if($strselvaluelist[$i] == 4){ if(!strstr(17, $strselvaluelist)){ $strselvaluelist.='|17'; } } $i++; } } var_dump($strselvaluelist);
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, 5.5.0 - 5.5.38, 5.6.0 - 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
string(7) "4|17|17"
preferences:
228.89 ms | 406 KiB | 397 Q