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The function example is comparing a string to a known date format.I suggest reading the documentation on the date format to see why you're making the wrong assumption.If you write everything in good format, but you type wrong date (I assumed that nobody could born before XX century), your controller will send the second statement. /^(19[0-9]|2[0-9])\-(0[1-9]|1[0-2])\-(0[1-9]|1[0-9]|2[0-9]|3[0-1])((T|\s)(0[0-9]|1[0-9]|2[0-3])\:(0[0-9]|1[0-9]|2[0-9]|3[0-9]|4[0-9]|5[0-9])\:(0[0-9]|1[0-9]|2[0-9]|3[0-9]|4[0-9]|5[0-9])((\ |\.)[\d ])? It should only be considered an aid to the user, in that it helps them make fewer invalid form submissions. If you want in regex, try this, this will validate for, 01/01/1900 through 12/31/2099 Matches invalid dates such as February 31st Accepts dashes, spaces, forward slashes and dots as date separators $dt = '6/26/1970' ; // or // '6.26.1970' ; $dt = preg_replace("([.] )", "/", $dt); $test_arr = explode('/', $dt); if (checkdate($test_arr, $test_arr, $test_arr) && preg_match("/[0-9]\/[0-9]\/[0-9]/", $dt)) else I tested it on Google Chrome and IE, everything works correctly.You are right, but in my case I'm only validating if moderator didn't make literal mistake in date format which is going directly to database instead of logical sense of given date. Furthemore, Chrome display simple additional interface. If you don't write anything in input or write it in bad format (correctly is following: '1919-12-23'), you will get the first statement.
$a is true, the others are false - and that is correct The function from Raveren (above) will not cover valid dates with timestamps !!! And btw: checkdate() would return true for $b although it is not a valid mysql datetime ok now I see what i meant, cuz I just ran into the same problem today. so if you got a string of date, it doesn't helps you.Empty dates are returned as null, and non-empty dates are formatted My SQL style 'Y-m-d'.In this Tutorial you'll learn about Validating Date fields using PHP code in 'dd/mm/yyyy' Format.We have also checked the leap year factor for the month of February.We have used "/" and "-" character as a separator within the date format but you are free to change that separator the way you want.