3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array("","","","","","","","","","","","","","PHM","PHN","N","","M9",""); $filter = 8; For($i=0;$i<$filter;$i++){ If(isset($arr[$i])) unset($arr[$i]); } Var_dump($arr);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(11) { [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(3) "PHM" [14]=> string(3) "PHN" [15]=> string(1) "N" [16]=> string(0) "" [17]=> string(2) "M9" [18]=> string(0) "" }

preferences:
152.6 ms | 409 KiB | 5 Q