如何检查php变量有datetime值？

Question

I have a php variable which contain date-time value like 2014-05-11 23:10:11 some times this may change, so i have to find it either it has date-time value or not, below is my variable

$my-variable='2014-08-26 18:25:47';

Answer 1

This should work for you to check if the string is a valid date time in your format:

<?php

    $date = '2014-08-26 18:25:47';


    function isTime($time) {
        if (preg_match("/^([1-2][0-3]|[01]?[1-9]):([0-5]?[0-9]):([0-5]?[0-9])$/", $time))
            return true;
        return false;
    }

    $parts = explode(" ", $date);
    list($y, $m, $d) = explode("-", $parts[0]);

    if(checkdate($m, $d, $y) && isTime($parts[1]) ){
        echo "OK";
    } else {
        echo "BAD";
    }

?>

output:

OK