php 한글 메뉴얼 도움말 검색 사이트 Get part of string [function.mb-substr]

설명

string mb_substr ( string $str , int $start [, int $length = NULL [, string $encoding = mb_internal_encoding() ]] )

Performs a multi-byte safe substr() operation based on number of characters. Position is counted from the beginning of str. First character's position is 0. Second character position is 1, and so on.

인수

str

The string to extract the substring from.

start

If start is non-negative, the returned string will start at the start'th position in string, counting from zero. For instance, in the string 'abcdef', the character at position 0 is 'a', the character at position 2 is 'c', and so forth.

If start is negative, the returned string will start at the start'th character from the end of string.

length

Maximum number of characters to use from str. If omitted or NULL is passed, extract all characters to the end of the string.

encoding

encoding 인수는 문자 인코딩입니다. 생략하면, 내부 문자 인코딩값을 사용합니다.

반환값

mb_substr() returns the portion of str specified by the start and length parameters.

변경점

버전	설명
5.4.8	Passing NULL as `length` extracts all characters to the end of the string. Prior to this version NULL was treated the same as 0.

참고

mb_strcut() - Get part of string
mb_internal_encoding() - Set/Get internal character encoding