mb_strrpos

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

mb_strrpos — Find position of last occurrence of a string in a string

설명

int mb_strrpos ( string $haystack , string $needle [, int $offset = 0 [, string $encoding = mb_internal_encoding() ]] )

Performs a multibyte safe strrpos() operation based on the number of characters. needle position is counted from the beginning of haystack. First character's position is 0. Second character position is 1.

인수

haystack: The string being checked, for the last occurrence of needle
needle: The string to find in haystack.
offset: May be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an arbitrary point prior to the end of the string.
encoding: encoding 인수는 문자 인코딩입니다. 생략하면, 내부 문자 인코딩값을 사용합니다.

반환값

Returns the numeric position of the last occurrence of needle in the haystack string. If needle is not found, it returns FALSE.

변경점

버전	설명
5.2.0	Added the optional parameter `offset`.

주의

Note: The encoding parameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility, encoding can be specified as the third parameter, but doing so is deprecated and will be removed in the future.

참고

mb_strpos() - Find position of first occurrence of string in a string
mb_internal_encoding() - Set/Get internal character encoding
strrpos() - 문자열에서 마지막 문자의 위치를 찾습니다

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User Contributed Notes 2 notes

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Anonymous ¶

19 years ago


mb_strrpos throws a warning if $haystack is empty. 
strrpos simply returns FALSE.

This is something to be wary of if overloading the mb functions.

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Anonymous ¶

9 years ago


"Negative values will stop searching at an arbitrary point prior to the end of the string. " ist misleading.
The needle may not fully part of searchrange, defined by a negative offset. 
A negative offsets marks the last byte, where a search could start.
<?php
$test = "Hallo, Herr Gött";
var_dump(strlen($test));                       // int(17)
var_dump(mb_strrpos($test,'ött',13));  // int(13)
var_dump(mb_strrpos($test,'ött',-4)); // int(13) 17-4 = 13
var_dump(mb_strrpos($test,'ött',-5)); // bool(false)
?>

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