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run code in 200+ php & hhvm versions
Bugs & Features
<?php $alpha = 'aabbccddeeffgghhiijjkk'; $alphaArray = str_split($alpha); $uniqArray = array_unique($alphaArray); var_dump($uniqArray);
based on eBSYA
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
array(11) { [0]=> string(1) "a" [2]=> string(1) "b" [4]=> string(1) "c" [6]=> string(1) "d" [8]=> string(1) "e" [10]=> string(1) "f" [12]=> string(1) "g" [14]=> string(1) "h" [16]=> string(1) "i" [18]=> string(1) "j" [20]=> string(1) "k" }