Question

我正在使用bellow查询进行更新，但现在我尝试将其更改为pdo，但无法正常工作如有任何帮助，将不胜感激

 function updateonlinesession(){            
    if(isset($_SESSION['username']['id'])){
    $uid = $_SESSION['username']['id'];
    $page = $_SERVER['REQUEST_URI'];
    $ip = $_SERVER['REMOTE_ADDR'];
    $username = $_SESSION['logged'];

    mysql_query("UPDATE site_user SET dateupdated  = now(),ip = '$ip' WHERE 
    username = '".mysql_real_escape_string($_SESSION['username'])."'"); 
    }

    }

这是我尝试使用pdo

function updateonlinesession(){         
if(isset($_SESSION['username']['id'])){
$uid = $_SESSION['username']['id'];
$page = $_SERVER['REQUEST_URI'];
$ip = $_SERVER['REMOTE_ADDR'];
$username = $_SESSION['logged'];

$update = ("UPDATE site_user SET dateupdated  = now(),ip = '$ip' WHERE 
username = '".($_SESSION['username'])."'");
$sth_update= $con->prepare($update);
$sth_update->execute();
}

}

?>

Answer 1

// connetion
$conn = new PDO("mysql:host=$dbhost;dbname=$dbname",$dbuser,$dbpass);

// query
$sql = "UPDATE site_user SET dateupdated = NOW(), ip = ?
        WHERE username = ?";
$q = $conn->prepare($sql);
$q->execute(array($ip, $_SESSION['username']);

Answer 2

首先，连接bootstrap / config文件中的某个地方：

$dsn = 'mysql:dbname=test;host=localhost;charset=utf8';
$opt = array(
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
);
$pdo = new PDO($dsn, $user, $pass, $opt);

然后，运行您的查询

function updateonlinesession(){
    global $pdo;
    if(isset($_SESSION['username']['id'])){
        $sql = "UPDATE site_user SET dateupdated=now(),ip=? WHERE username=?"; 
        $pdo->prepare($sql);
        $pdo->execute(array($_SERVER['REMOTE_ADDR'], $_SESSION['logged']));
    }
}

确保您使用的所有变量都具有正确的值（var_dump($_SESSION)就足够了）

Answer 3

$stmt = $db->prepare("UPDATE site_user SET dateupdated=now(), ip=? WHERE username=?");
$stmt->execute(array($ip, $_SESSION['username']));
$affected_rows = $stmt->rowCount();

其中$db是您的连接

再次：A great tutorial

Answer 4

function updateonlinesession(){
    if(isset($_SESSION['username']['id'])){
        $uid = $_SESSION['username']['id'];
        $page = $_SERVER['REQUEST_URI'];
        $ip = $_SERVER['REMOTE_ADDR'];
        $username = $_SESSION['logged'];

        //Establish your PDO object.
        $pdo = new PDO("mysql:host=localhost;dbname=mydb", "username", "password");

        //Prepare your statement.
        $stmt = $pdo->prepare("UPDATE site_user SET dateupdate = now(), ip = ? WHERE username = ?");
        $stmt->execute(array(
            $ip,
            $_SESSION['username']
        ));
        $stmt->closeCursor();
    }
}

如何将更新查询从mysql更改为pdo？

4 个答案: