| public static byteSubstr ( string $string, integer $start, integer $length = null ) : string | ||
| $string | string | the input string. Must be one character or longer. |
| $start | integer | the starting position |
| $length | integer | the desired portion length. If not specified or `null`, there will be no limit on length i.e. the output will be until the end of the string. |
| 리턴 | string | the extracted part of string, or FALSE on failure or an empty string. |
public static function byteSubstr($string, $start, $length = null)
{
return mb_substr($string, $start, $length === null ? mb_strlen($string, '8bit') : $length, '8bit');
}