I wrote a tutorial here about the CI date. At that post I used the HTML <select> for the input of date. Sometime our client can want to use text box for the date input. We need the validation for this date. I have found this code from here. It is for CI 1.7.* and PHP 5.2.*. So I change some code for the CI 2.0.* and PHP 5.3.*.
To use, copy the class below into your application/libraries folder named MY_Form_validation.php, then in your controller use it like any other rule.
Form
This validation rule validates an input text box only right now.
<input type="text" name="date" value="<?php echo set_value('date'); ?>" size="10" />
Controller Usage
UK
$this->form_validation->set_rules('date', 'date', 'trim|required|valid_date[d/m/y,/]');
US
$this->form_validation->set_rules('date', 'date', 'trim|required|valid_date[m/d/y,/]');
Database
$this->form_validation->set_rules('date', 'date', 'trim|required|valid_date[y-m-d,-]');
Code
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class MY_Form_validation extends CI_Form_validation {
function __construct(){
parent::__construct();
}
/**
* @desc Validates a date format
* @params format,delimiter
* e.g. d/m/y,/ or y-m-d,-
*/
function valid_date($str, $params)
{
// setup
$CI =&get_instance();
$params = explode(',', $params);
$delimiter = $params[1];
$date_parts = explode($delimiter, $params[0]);
// get the index (0, 1 or 2) for each part
$di = $this->valid_date_part_index($date_parts, 'd');
$mi = $this->valid_date_part_index($date_parts, 'm');
$yi = $this->valid_date_part_index($date_parts, 'y');
// regex setup
$dre = "(0?1|0?2|0?3|0?4|0?5|0?6|0?7|0?8|0?9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)";
$mre = "(0?1|0?2|0?3|0?4|0?5|0?6|0?7|0?8|0?9|10|11|12)";
$yre = "([0-9]{4})";
$red = ''.$delimiter; // escape delimiter for regex
$rex = "/^[0]{$red}[1]{$red}[2]/";
// do replacements at correct positions
$rex = str_replace("[{$di}]", $dre, $rex);
$rex = str_replace("[{$mi}]", $mre, $rex);
$rex = str_replace("[{$yi}]", $yre, $rex);
if (preg_match($rex, $str, $matches))
{
// skip 0 as it contains full match, check the date is logically valid
if (checkdate($matches[$mi + 1], $matches[$di + 1], $matches[$yi + 1]))
{
return true;
}
else
{
// match but logically invalid
$CI->form_validation->set_message('valid_date', "The date is invalid.");
return false;
}
}
// no match
$CI->form_validation->set_message('valid_date', "The date format is invalid. Use {$params[0]}");
return false;
}
function valid_date_part_index($parts, $search)
{
for ($i = 0; $i <= count($parts); $i++)
{
if ($parts[$i] == $search)
{
return $i;
}
}
}
}
?>
`
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