[PHP] Date validation for Codeigniter 2

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.

FormThis 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; } } } } ?> 

`

Posted by Unknown