Codeigniter: date validation - php

Question

Does anyone know how to validate date. For example, cannot have 30 Feb, and no 31 in certain month so when the user enter the valid it will be rejected. I was think about a call back function but not sure how it will be done.

Answer 1

Create a call back function using PHP checkdate function
Use this guide to create callback functions in Codeigniter.

Answer 2

try this the code also takes leap year into account
function valid_date($date)
{
$pattern = '/^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[1,3-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0-8])(\/|-|\.)(?:(?:0?[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$/';
if(preg_match($pattern, $date) )
{
return true;
}
else
{
$this->form_validation->set_message('valid_date', 'The %s is not valid it should match this dd/md/yyyy format');
return false;
}
}
//and just use this to set rules
$this->form_validation->set_rules('Your date field from html', 'date', 'required|callback_valid_date');

Answer 3

You can use simple regex to validate the date in dd-mm-yyyy format
$this->form_validation->set_rules('dob', 'Date in dd-mm-yyyy',
'regex_match[(0[1-9]|1[0-9]|2[0-9]|3(0|1))-(0[1-9]|1[0-2])-\d{4}]');
for validation using callback this will make sure of month Feb which is 28 days use this
//Add a rule for validation
$this->form_validation->set_rules('dob', 'Date of Birth', 'callback_valid_date');
//Define a callback and pass the format of date
public function valid_date($date, $format = 'Y-m-d')
{
$d = DateTime::createFromFormat($format, $date);
//Check for valid date in given format
if($d && $d->format($format) == $date) {
return true;
} else {
$this->form_validation->set_message('valid_date',
'The %s date is not valid it should match this ('.$format.') format');
return false;
}
}