iconv_strrpos
(PHP 5, PHP 7, PHP 8)
iconv_strrpos — Finds the last occurrence of a needle within a haystack
說明
$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.
參數
-
haystack -
The entire string.
-
needle -
The searched substring.
-
encoding -
If
encodingparameter is omitted ornull,stringare 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.
更新日誌
| 版本 | 說明 |
|---|---|
| 8.0.0 |
encoding is nullable now.
|
參見
- strrpos() - 計算指定字串在目標字串中最後一次出現的位置
- iconv_strpos() - Finds position of first occurrence of a needle within a haystack
- mb_strrpos() - 查詢字串在一個字串中最後出現的位置