PHP - Validate a date

validate_date.php

/**
 * Validate a date.
 *
 * Source: http://www.phpro.org/examples/Validate-Date-Using-PHP.html
 *
 * @param string $date
 * @param string $format
 * @return bool
 *
*/
function validateDate($date, $format = 'DD/MM/YYYY')
{
  switch ($format) {
    case 'YYYY/MM/DD':
    case 'YYYY-MM-DD':
    	list($y, $m, $d) = preg_split('/[-\.\/ ]/', $date);
    	break;

    case 'YYYY/DD/MM':
    case 'YYYY-DD-MM':
    	list($y, $d, $m) = preg_split('/[-\.\/ ]/', $date);
    	break;

    case 'DD-MM-YYYY':
    case 'DD/MM/YYYY':
    	list($d, $m, $y) = preg_split('/[-\.\/ ]/', $date);
    	break;

    case 'MM-DD-YYYY':
    case 'MM/DD/YYYY':
    	list($m, $d, $y) = preg_split('/[-\.\/ ]/', $date);
    	break;

    case 'YYYYMMDD':
    	$y = substr($date, 0, 4);
    	$m = substr($date, 4, 2);
    	$d = substr($date, 6, 2);
    	break;

    case 'YYYYDDMM':
   		$y = substr($date, 0, 4);
    	$d = substr($date, 4, 2);
    	$m = substr($date, 6, 2);
    	break;

    default:
    	return FALSE;
  }
  
  return @checkdate($m, $d, $y);
}