通过类/对象的PHP多MySQL连接？

以下是我正在努力实现的代码：

<?php

class database {
    var $connection;
    function database($host,$username,$password,$database){
        $this->connection = mysql_connect($host, $username, $password);
        mysql_select_db($database,$this->connection);
    }
    function query($query){
        $query = mysql_query($query,$this->connection);
        return $query;
    }
}

$db = new database("localhost","root","password","database1");
$db2 = new database("SERVER2","root","password","database2");

$sql = $db->query("SELECT * FROM users WHERE name = 'Yifan' LIMIT 1");
$row = mysql_fetch_assoc($sql);

var_dump($row);

$sql = $db2->query("SELECT * FROM users WHERE name = 'Yifan' LIMIT 1");
$row = mysql_fetch_assoc($sql);

var_dump($row);

?>

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mysql\u connect的下一个参数是$new\u link，您可以尝试在那里发送一个true，看看是否有帮助吗

$this->connection = mysql_connect($host, $username, $password, true);

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您可能需要考虑迁移到MySQLI，这是更新和更成熟的。谢谢，我为SQL连接做类的原因之一是支持多个服务器。所以类mysqlDB扩展了数据库，类mysqliDB扩展了数据库，等等。