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run code in 300+ PHP versions simultaneously
<?php $arr = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'); $str = strrev(chunk_split(implode(array_reverse($arr)), 3, ';')); echo $str;

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31.06 ms | 402 KiB | 5 Q