public function less_than_equal_to(string $str = null, string $max): bool
	{
		return is_numeric($str) ? ($str <= $max) : false;
	}
public function less_than_equal_to(string $str = null, string $max): bool
	{
		return is_numeric($str) ? ($str <= $max) : false;
	}
public function less_than_equal_to ( string $ str = null , string $ max ) : bool { return is_numeric ( $ str ) ? ( $ str <= $ max ) : false ; }
Equal to or Less than

@param string $str
@param string $max

@return boolean
Equal to or Less than