The Ajax Request class is a simple one we've created and use on a number of projects. You can find the details in Web Services using XMLHttp Request (Ajax) and related articles. It doesn't allow a space after minutes and before the am/pm example: " am" will get an invalid time. I modified the reg to the following: re = /^(\d): (\d)(:00)?
Each of these values is then tested against an allowed range (days: 1 - 31; months: 1 - 12; years: 1902 - 2017; and so on).
This script only confirms that the input format is correct and that each individual value falls within its allowed range.
The code behind the form now is as follows: If you're not already familiar with regular expressions, then this might be getting a bit complicated.
Basically, for each of the regular expression tests, an array is returned holding each component of the pattern that we've matched.
The output will be almost identical to the earlier examples.
In this simple example we can even rewrite the In practice most modern browsers will now use HTML form validation to preempt any Java Script validation - with the notable exception of Safari. Visitors from some countries may find it confusing that we're using the and vice-versa as the year and day values have now changed position.
Instead we're going to make use of Form Validation using Ajax to do some real-time checking using a server-side PHP script to get a definitive answer.
When you enter a date in the format dd/mm/yyyy the value is sent via an Ajax call to the server where it is validated using the PHP checkdate function.
For example, when the date is checked, the return value, , is an array with elements 1 through 3 containing the day, month and year components of the input string.
For the time check, the array returned includes the hour (pos 1), minutes (pos 2) and, optionally, the am/pm string (pos 3).
“31/4/20100”, “31/04/2010” – April has 30 days only 8.