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run code in 200+ php & hhvm versions
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<?php $str = '1,2,3,6,54,8'; $str2 = ''; var_dump(explode(',',$str)); var_dump(explode(',',$str2));
based on OA0qS
Output for 4.3.0 - 7.2.0
array(6) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" [3]=> string(1) "6" [4]=> string(2) "54" [5]=> string(1) "8" } array(1) { [0]=> string(0) "" }