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Forum Index / Feedback / DateTime validation using regex

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Jelle De Loecker

30 December 09 / 15:38

Thanks to the post of a guy named Brett I was able to create this little datetime validator:

<?php
    // is a valid datetime (yyyy-mm-dd hh:ii:ss)
    function IsDateTime($value)
    {

        return preg_match('/\\A(?:^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\\s(((0?[0-9])|(1[0-9])|(2[0-3]))\\:([0-5][0-9])((\\s)|(\\:([0-5][0-9])))?))?$)\\z/', $value);

    }

    function _IsDateTime($value)
    {
        return StrLen($value) == 0 || Validator::IsDateTime($value);
    }
?>

It's more strict than trying to convert something using strtotime(), which is why I'm using it.

Enjoy.

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