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@ 2015-10-18T11:16:03Z

<?php

$in = "10001101";
$out = preg_split('/(.)(?!$)(?!\1)\K/', $in, -1, PREG_SPLIT_NO_EMPTY);

print_r($out);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
preg_split: documentation ( source)

preferences:dark modelive preview

53.63 ms | 402 KiB | 5 Q