<?php $k = 201435; $str = strval($k); $year = intval(substr($str,0,4)); $month = intval(substr($str,4)); while($month>12){ $month = $month-12; $year++; } $formatted = intval(strval($year).str_pad(strval($month), 2, "0", STR_PAD_LEFT)); var_dump($month, $year, $formatted);
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