mb_strrpos

(PHP 4 >= 4.0.6, PHP 5)

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

说明

int mb_strrpos ( string $haystack , string $needle [, int $offset = 0 [, string $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.

参数

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 参数为字符编码。如果省略，则使用内部字符编码。

返回值

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

更新日志

版本	说明
5.2.0	Added the optional parameter `offset`.

注释

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.

参见

mb_strpos() - Find position of first occurrence of string in a string
mb_internal_encoding() - Set/Get internal character encoding
strrpos() - 计算指定字符串在目标字符串中最后一次出现的位置

add a note User Contributed Notes mb_strrpos

27-Nov-2005 11:32


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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