phpqa

Its a callback function for codeigniter Form validation class. It will check, whether the input date is a valid date, and it will also check whether the user is above a particular age limit. Here its 13 years.

You can use this function in codeigniter as given below

load form validation class for codeigniter into your controller functions

$this->load->library('form_validation');

Set the rules for date of birth field

$config = array(
                  array(
                     'field'   => 'dob',
                     'label'   => 'date of birth',
                     'rules'   => 'trim|required|callback_dob_valid'
                  ),
                 );

if you need you can add additional rules
Set the Rule for your form

$this->form_validation->set_rules($config);

then run the form against these rules

if ($this->form_validation->run() == FALSE)
{
     // reload the view
}
else
{
      // success action
}

/**
 * Date of birth
 * Checking for a valid date for date of birth and age verification
 *
 * @author http://phpqa.in
 * @since
 * @copyright GPL 
 */
function dob_valid($str)
{
if($str)
{
//match the format of the date dd-mm-yyyy
 // for yyyy-mm-dd  use "/^([0-9]{4})-([0-9]{2})-([0-9]{4})$/
 if (preg_match ("/^([0-9]{2})-([0-9]{2})-([0-9]{4})$/", $str, $parts))
 {
   //check weather the date is valid of not   
 
   $day        = $parts[1];
   $month = $parts[2];
   $year        = $parts[3];
  
   /*
   // for yyyy-mm-dd 
   $day        = $parts[3];
   $month = $parts[2];
   $year        = $parts[1];
   */
  
   // checking 4 valid date
  
   if(!checkdate($month,$day,$year))
   {
$this->form_validation->set_message('dob_valid', '%s is not a valid date, use dd-mm-yyyy format');
return false;
}
else
{
//check for future date
$dob = $year.'-'.$month.'-'.$day;
if($dob < date("Y-m-d"))
{
// age verification using DOB
$dob_time = mktime(0, 0, 0, $month,$day,$year);
$age_req = strtotime('+13 years', $dob_time);
if(time() < $age_req)
{
   $this->form_validation->set_message('dob_valid', 'You must be atleast 13 years old');
   return false;
}
else
{
  return true;
}
return true;
}
else
{
$this->form_validation->set_message('dob_valid', '%s should be a past date');
return false;
}
}
 }
 else
 {
  $this->form_validation->set_message('dob_valid', '%s is not a valid date, use dd-mm-yyyy format');
  return false;
 }
}
return false;
} 
By removing the "$this->form_validation->set_message()" function from the above function we can use the above function in any php scripts