jQuery實現文本框郵箱輸入自動補全效果
737
2024-03-21
(PHP 5)
iconv_strpos — Finds position of first occurrence of a needle within a haystack
說明
int iconv_strpos ( string$haystack
, string $needle
[, int $offset = 0
[, string $charset = ini_get("iconv.internal_encoding")
]] )
Finds position of first occurrence of a needle
within a haystack.
In contrast to strpos(), the return value of
iconv_strpos() 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.
參數
haystack
The entire string.
needle
The searched substring.
offset
The optional offset parameter specifies
the position from which the search should be performed.
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 first occurrence of
needle in haystack.
If needle is not found,
iconv_strpos() will return FALSE.
此函數可能返回布爾值
FALSE，但也可能返回等同于 FALSE 的非布爾值。請閱讀 布爾類型章節以獲取更多信息。應使用
===
運算符來測試此函數的返回值。
參見
strpos() - 查找字符串首次出現的位置 iconv_strrpos() - Finds the last occurrence of a needle within a haystack mb_strpos() - 查找字符串在另一個字符串中首次出現的位置
