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このドキュメントでは、 php中国語ネットマニュアル リリース
(PHP 5, PHP 7)
iconv_strrpos — Finds the last occurrence of a needle within a haystack
$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
.
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.
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。