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run code in 150+ php & hhvm versions
Bugs & Features
<?php /** * @param string $date format rrrr-mm-dd * @return mixed - false or date format d.m.rrrr which really exists */ function typicalFormat($date){ $date = explode('-', $date); if(count($date) == 3){ $year = $date[0]; $date[1] = preg_replace('~^0~', '', $date[1]); $date[0] = preg_replace('~^0~', '', $date[2]); $date[2] = $year; $date = implode('.', $date); if(existsDate($date) == 1){ return $date; } return false; } return false; } /** * @param string $date format d.m.rrrr * @return bool * @copyright Jakub Vrána, http://php.vrana.cz/ */ function existsDate($date){ return preg_match('~^([1-9]|19|[12][0-8]|29(?=\\.([^2]|2\\.(([02468][048]|[13579][26])00|[0-9]{2}(0[48]|[2468][048]|[13579][26]))))|30(?=\\.[^2])|31(?=\\.([13578][02]?\\.)))\\.([1-9]|1[012])\\.[0-9]{4}$~D', $date); } var_dump(typicalFormat('1000-02-05')); die();
based on EdTsh
Output for 4.3.0 - 7.1.0
string(8) "5.2.1000"