Validation::between PHP Method

    public static function between($value, $min, $max)
    {
        if (!is_numeric($value)) {
            $value = strlen($value);
        }
        return filter_var($value, FILTER_VALIDATE_INT, array('options' => array('min_range' => $min, 'max_range' => $max))) !== false;
    }

 /**
  * testBetween method
  *
  * @access public
  * @return void
  */
 function testBetween()
 {
     $this->assertTrue(Validation::between('abcdefg', 1, 7));
     $this->assertTrue(Validation::between('', 0, 7));
     $this->assertFalse(Validation::between('abcdefg', 1, 6));
 }