PHP5中文手册·Finds the last occurrence of a needle within a haystack -- 追寻梦想＞编程乐园＞PHP 编程

说明

int iconv_strrpos ( string $haystack , string $needle [, string $charset ] )

In contrast to strpos(), the return value of iconv_strrpos() is the number of characters that appear before the needle, rather than the offset in bytes to the position where the needle has been found.

参数

haystack: The entire string.
needle: The searched substring.
charset: If charset parameter is omitted, string are assumed to be encoded in iconv.internal_encoding.

If haystack or needle is not a string, it is converted to a string and applied as the ordinal value of a character.

返回值

Returns the numeric position of the last occurrence of needle in haystack . The characters are counted on the basis of the specified character set charset .

If needle is not found, iconv_strrpos() will return FALSE.

Warning

本函数可能返回布尔值 FALSE，但也可能返回一个与 FALSE 等值的非布尔值，例如 0 或者 ""。请参阅布尔类型章节以获取更多信息。应使用 === 运算符来测试本函数的返回值。


	PHP5中文手册 iconv_strpos iconv_substr iconv PHP Manual iconv_strrpos (PHP 5) iconv_strrpos — Finds the last occurrence of a needle within a haystack 说明 int iconv_strrpos ( string `$haystack` , string `$needle` [, string `$charset` ] ) In contrast to strpos(), the return value of iconv_strrpos() is the number of characters that appear before the needle, rather than the offset in bytes to the position where the needle has been found. 参数 `haystack` The entire string. `needle` The searched substring. `charset` If `charset` parameter is omitted, `string` are assumed to be encoded in iconv.internal_encoding. If `haystack` or `needle` is not a string, it is converted to a string and applied as the ordinal value of a character. 返回值 Returns the numeric position of the last occurrence of `needle` in `haystack` . The characters are counted on the basis of the specified character set `charset` . If `needle` is not found, iconv_strrpos() will return `FALSE`. Warning 本函数可能返回布尔值 `FALSE`，但也可能返回一个与 `FALSE` 等值的非布尔值，例如 0 或者 ""。请参阅布尔类型章节以获取更多信息。应使用 === 运算符来测试本函数的返回值。参见 strrpos() iconv_strpos() mb_strrpos() iconv_strpos iconv_substr iconv PHP Manual

iconv_strrpos

说明

参数

返回值

参见