validate date time using regex or another option

[autofocus]

Hi.

 

i have a form with date , time and credit card information.

 

i want to validate date, time, credit card number format(after customer select card type from visa amex and mastercard)

 

do i have to use regex?

 

or is there any built in method in php to check date and time.

 

thanks

[Psycho]

It kind of depends on how you let the user input the date and time. You may have to convert their input accordingly. But, you may want to take a look at the following functions:

 

For date only:

http://us3.php.net/manual/en/function.checkdate.php

 

For a date & time (but a failure will not tell you which one failed)

http://us3.php.net/manual/en/function.strtotime.php

 

I'd suggest using the first function to validate the date and then use a custom function for validating the time. Again, this depends on what the input parameters are.