function date_part_is_valid in Date 5

Function to test validity of specific date part

Parameters

$value - the value to test: @param $part - the type of date part provided, coult be 'year', 'mon', or 'mday' @parma $min either 0 or 1, use to set min for mon and mday can be 0 for iso dates, set to 1 for unix timestamps that require a complete date

3 calls to date_part_is_valid()

date_is_valid in ./date.inc

Functions to test the validity of various date parts

date_selector_validate in ./date.inc

Validation function for date selector $params = an array of values including: required = is a valid date required, default is true opt_fields = an array of fields that need not be filled out, default is empty array

date_text2iso in ./date.inc

Use stringtotime function to create an iso date out of text

File

./date.inc, line 1579

Date/time API functions

Code

function date_part_is_valid($value, $part, $min = 0) {
  switch ($part) {
    case 'year':
      if ($value < DATE_MIN_YEAR || $value > DATE_MAX_YEAR) {
        return FALSE;
      }
      break;
    case 'mon':
      if ($value < $min || $value > 12) {
        return FALSE;
      }
      break;
    case 'mday':
      if ($value < $min || $value > 31) {
        return FALSE;
      }
      break;
    case 'week':
      if ($value < 0 || $value > 53) {
        return FALSE;
      }
      break;
  }
  return TRUE;
}