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 [, string $encoding ]] )

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

mb_strrpos() performs multi-byte safe strrpos() operation based on number of characters. needle position is counted from the beginning of haystack . First character's position is 0. Second character position is 1.

If encoding is omitted, internal encoding is assumed.

encoding is character encoding. If it is not specified, internal character encoding is used.

Note: As of PHP 5.2.0 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.

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.

更新日志

版本	说明
5.2.0	Added the optional parameter `offset` .

参见

add a note User Contributed Notes
mb_strrpos

fr
25-Apr-2008 01:11


Can someone please explain how the function must be called before this stupid parameter change in PHP 5.2.0!

28-Nov-2005 10:32


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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mb_strstr

mb_strripos

Last updated: Mon, 26 Nov 2007