(PHP 5, PHP 7, PHP 8)
iconv_strrpos — Finds the last occurrence of a needle within a haystack
$haystack, string $needle, ?string $encoding = null): int|false
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 encoding.
haystackThe entire string.
needleThe searched substring.
encoding
If encoding parameter is omitted or null,
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.
此函數(shù)可能返回布爾值
false，但也可能返回等同于 false 的非布爾值。請(qǐng)閱讀 布爾類型章節(jié)以獲取更多信息。應(yīng)使用
===
運(yùn)算符來測(cè)試此函數(shù)的返回值。
| 版本 | 說明 |
|---|---|
| 8.0.0 |
encoding is nullable now.
|