Date validation?

[eluser]C4iO [PyroDEV][/eluser]
Hey there...

Just want to post my own tweak for the valid_date function suggested here.

Code:

<?php if (!defined('BASEPATH'))    exit('No direct script access allowed');

class MY_Form_validation extends CI_Form_validation {

    function __construct() {
        parent::CI_Form_validation();
    }

    // --------------------------------------------------------------------

    /**
     * Valid Date
     *
     * @access    public
     * @param    string
     * @return    bool
     */

    function valid_date($str) {
        $CI =& get_instance();
        $CI->form_validation->set_message('valid_date', 'O campo %s precisa estar no formato dd/mm/yyyy');

        if (preg_match("/^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9]{2}$/", $str)) {
            $arr = explode("/", $str);
            $yyyy = $arr[0];
            $mm = $arr[1];
            $dd = $arr[2];
            if (is_numeric($yyyy) && is_numeric($mm) && is_numeric($dd)) {
                return checkdate($mm, $dd, $yyyy);
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
}

My tweaks were:

1. Better regex (IMO):

Code:

/^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9]{2}$/

This will accept dates in the format dd/mm/yyyy, dd mm yyyy, dd.mm.yyyy or dd-mm-yyyy.

It also tries to be more strict in terms of what numbers are entered for day (0 followed by 1 to 9, 1 or 2 followed by 0 to 9, 3 followed by 0 or 1), for month (0 followed by 1 to 9, 1 followed by 0 or 1 or 2) and for year (19 or 20 followed by 0 to 9 restricted to 2 digits)

Preg_match expects "/" before and after the pattern. The "^" sign is "beginning of the pattern" and the "$" sign is "end of the pattern".

2. Ereg is deprecated, so I switched it to preg_match

3. Split is also deprecated, so I switched it to explode

4. I'm brazilian, so I translated the message.


Good coding 4 everyone.