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@ 2017-03-15T02:32:52Z

<?php

    $haystack = "ACAAGACACATGCCACATTGTCC";
    $needle = "ACA";
    echo preg_match_all("/(?=$needle)/", $haystack, $matches);

Output
Performance
VLD
References
Branches

preg_match_all: documentation ( source)

preferences:dark modelive previewkey bindings

21.91 ms | 475 KiB | 4 Q