myqsli - >取生成PDO

Question

我需要這個mysqli的改變對工作PDO：

$user = "name"; 
$pass = "password"; 
try { 
    $dbh = new PDO('mysql:host=host;dbname=dbname', $user, $pass); 
    $dbh = null; 
} catch (PDOException $e) { 
    print "Error!: " . $e->getMessage() . "<br/>"; 
    die(); 
} 

$sth = $dbh->prepare("SELECT * FROM table"); 
$sth->execute(); 

    while ($user = $sth->fetch(PDO::FETCH_ASSOC)) { 

     echo $user[1]; 

    } 

使用這種取我沒有得到預期的結果.. 但這並不工作，任何人都可以檢查嗎？ 問候

Answer 1

你爲什麼將$ dbh設置爲null？

$dbh = new PDO('mysql:host=host;dbname=dbname', $user, $pass); 
$dbh = null; <--remove this line. 

Answer 2

它應該是：

while ($user = $sth->fetch(PDO::FETCH_ASSOC)) { 
    echo $user['username']; // Put the actual column name here, I'm just guessing 
} 

或：

while ($user = $sth->fetch(PDO::FETCH_NUM)) { 
    echo $user[1]; 
} 

PDO::FETCH_ASSOC就像是mysqli_fetch_assoc，並PDO::FETCH_NUM就像mysqli_fetch_row。