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
说明
string sqlite_fetch_single
( resource $result
[, bool $decode_binary
] )
Object oriented style (method):
SQLiteResult
string fetchSingle
([ bool $decode_binary
] )
SQLiteUnbuffered
string fetchSingle
([ bool $decode_binary
] )
sqlite_fetch_single() is identical to sqlite_fetch_array() except that it returns the value of the first column of the rowset.
This is the most optimal way to retrieve data when you are only interested in the values from a single column of data.
参数
- result
-
The SQLite result resource. This parameter is not required when using the object-oriented method.
- decode_binary
-
当 decode_binary 参数设为 TRUE（默认值）时，PHP 将解码那些由 sqlite_escape_string() 编码的数据。通常应保留此值为其默认值，除非在操作其它支持 sqlite 程序建立的数据库时。
范例
Example#1 A sqlite_fetch_single() example
<?php
if ($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);
}
?>
