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=ini_set("iconv.internal_encoding") ] )

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() - Find position of last occurrence of a char in a string
iconv_strpos() - Finds position of first occurrence of a needle within a haystack
mb_strrpos() - Find position of last occurrence of a string in a string