function.age.php

<?php

/**
 * Smarty Age Calculator for PICKLES
 *
 * PICKLES is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * PICKLES is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with PICKLES.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * @author    Joshua John Sherman <[email protected]>
 * @copyright Copyright 2009 Joshua John Sherman
 * @link      http://phpwithpickles.org
 * @license   http://www.gnu.org/copyleft/lesser.html
 * @package   PICKLES
 */

/**
 * Smarty Function: age 
 *
 * Pass it a date, it spits back an age.
 *
 * @param  array Parameters array
 * @param  object Smarty object
 * @return integer calculated age
 * @usage  <code>{age dob="1981-02-23"}</code>
 */
function smarty_function_age($params, &$smarty)
{
    // Checks for our parameter
    if (empty($params['dob']))
    {
        $smarty->trigger_error('assign: missing \'dob\' parameter');
    }
    else
    {
        // Breaks the date apart
        list($dob_year, $dob_month, $dob_day) = split('-', $params['dob'], 3);
        
        // Determines the age regardless of the day
        $age = date('Y') - $dob_year;

        // If today's month day is less than the DOB then decrement
        if (date('md') < $dob_month . $dob_day)
        {
            $age--;
        }

        // Returns the age
        return $age;
    }
}

?>