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.
Note:
mb_regex_encoding() 指定的内部编码或字符编码将会当作此函数用的字符编码。
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
