3v4l.org

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<?php $a = "a74b8c0d3845e7"; preg_match_all("/[\d]+/", $a, $numbers); preg_match_all("/[a-z]+/i", $a, $strings); $c=array_combine($strings[0],$numbers[0]); print_r($c);

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32.45 ms | 406 KiB | 5 Q