php四种定界符详解
125
2024-01-10
(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_get("iconv.internal_encoding")
] )
Finds the last occurrence of a needle
within a haystack.
In contrast to strrpos(), 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. The characters are counted
on the basis of the specified character set charset.
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.
If needle is not found,
iconv_strrpos() will return FALSE.
此函数可能返回布尔值
FALSE，但也可能返回等同于 FALSE 的非布尔值。请阅读 布尔类型章节以获取更多信息。应使用
===
运算符来测试此函数的返回值。
参见
strrpos() - 计算指定字符串在目标字符串中最后一次出现的位置 iconv_strpos() - Finds position of first occurrence of a needle within a haystack mb_strrpos() - 查找字符串在一个字符串中最后出现的位置
