(PHP 4 >= 4.0.6, PHP 5)
mb_substr — Get part of string
$str
, int $start
[, int $length
[, string $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.
str
The string to extract the substring from.
start
Position of first character to use from str.
length
Maximum number of characters to use from str.
encoding
encoding
参数为字符编码。如果省略，则使用内部字符编码。
mb_substr() returns the portion of
str specified by the
start and
length parameters.