It appears that the $offset value is a character count not a byte count. (This may seem obvious but it isn't explicitly stated)
mb_strpos
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
mb_strpos — Find position of first occurrence of string in a string
설명
int mb_strpos
( string
$haystack
, string $needle
[, int $offset = 0
[, string $encoding = mb_internal_encoding()
]] )Finds position of the first occurrence of a string in a string.
Performs a multi-byte safe strpos() operation based on number of characters. The first character's position is 0, the second character position is 1, and so on.
인수
-
haystack -
The string being checked.
-
needle -
The string to find in
haystack. In contrast with strpos(), numeric values are not applied as the ordinal value of a character. -
offset -
The search offset. If it is not specified, 0 is used. A negative offset counts from the end of the string.
-
encoding -
encoding인수는 문자 인코딩입니다. 생략하면, 내부 문자 인코딩값을 사용합니다.
반환값
Returns the numeric position of
the first occurrence of needle in the
haystack string. If
needle is not found, it returns FALSE.
변경점
| 버전 | 설명 |
|---|---|
| 7.1.0 |
Support for negative offsets has been added.
|
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User Contributed Notes 3 notes
stestagg at talk21 dot com ¶
18 years ago
stestagg at talk21 dot com ¶
18 years ago
a sample mb_str_replace function:
function mb_str_replace($haystack, $search,$replace, $offset=0,$encoding='auto'){
$len_sch=mb_strlen($search,$encoding);
$len_rep=mb_strlen($replace,$encoding);
while (($offset=mb_strpos($haystack,$search,$offset,$encoding))!==false){
$haystack=mb_substr($haystack,0,$offset,$encoding)
.$replace
.mb_substr($haystack,$offset+$len_sch,1000,$encoding);
$offset=$offset+$len_rep;
if ($offset>mb_strlen($haystack,$encoding))break;
}
return $haystack;
}
stestagg at talk21 dot com ¶
18 years ago
sorry, my previous post had an error. replace the 1000 with strlen($haystack) to handle strings longer than 1000 chars.
btw. This is an issue with the mbstring functions. you can't specify the $encoding without specifying a $length, thus this reduces the functionality of mb_substr compared to substr
