sqlite_fetch_single
SQLiteResult->fetchSingle
SQLiteUnbuffered->fetchSingle
(No version information available, might be only in CVS)
SQLiteUnbuffered->fetchSingle — Fetches the first column of a result set as a string
說明
string sqlite_fetch_single
( resource $result
[, bool $decode_binary
] )
Object oriented style (method):
SQLiteResult
string fetchSingle
([ bool $decode_binary
] )
SQLiteUnbuffered
string fetchSingle
([ bool $decode_binary
] )
sqlite_fetch_single() is identical to sqlite_fetch_array() except that it returns the value of the first column of the rowset.
This is the most optimal way to retrieve data when you are only interested in the values from a single column of data.
參數
- result
-
The SQLite result resource. This parameter is not required when using the object-oriented method.
- decode_binary
-
當 decode_binary 參數設為 TRUE（預設值）時，PHP 將解碼那些由 sqlite_escape_string() 編碼的資料。通常應保留此值為其預設值，除非在操作其它支援 sqlite 程式建立的資料庫時。
範例
Example#1 A sqlite_fetch_single() example
<?php
if ($dbhandle = sqlite_open('mysqlitedb', 0666, $sqliteerror)) {
$sql = "SELECT id FROM sometable WHERE id = 42";
$res = sqlite_query($dbhandle, $sql);
if (sqlite_num_rows($res) > 0) {
echo sqlite_fetch_single($res); // 42
}
sqlite_close($dbhandle);
}
?>