Question

为什么我的Mysqli没有更新？相反它INSERT一个新用户甚至强硬它的uniqis $ FUID，有什么可以做的，我的表有一个自动增量列或什么？我做错了什么？（对不起，如果它看起来像是一个基本的愚蠢问题，我只是在学习，并且因为太多时间试图解决这个问题而陷入困境）

代码：

// Create connection. 
$conn = mysqli_connect($servername, $username, $password, $dbusers); 
if (!$conn) { 
    die("Connection failed: " . mysqli_connect_error()); 
}   
/*---- check for existing user ----*/
$sql=mysqli_query("SELECT * FROM Users WHERE Fuid $fuid");
//Uniq ID already exists
 if(mysqli_num_rows($sql) == 0) // tryed $check = mysqli_num_rows( $check); 
                                //if (empty($check))
   {
    $jkey = md5(microtime().rand()); //create random key for arduino connecton authentication

    $sql = "INSERT INTO Users (Fuid,Ffname,Femail,JKey,Gender) VALUES ('$fbid','$fbfullname','$femail','$jkey','$gender')";
    if (mysqli_query($conn, $sql)) { echo "OK - user ".$fbid." email: ".$femail; }
         else { echo "Fail: " . $sql . "<br>" . mysqli_error($conn); }    

 /*---- existing user, update user data into db ----*/ 
    } 
 else {   // If Returned user . update the user record 
    $sql = "UPDATE Users SET Ffname='$ffname', Femail='$femail' where Fuid = $fuid ";
    if (mysqli_query($conn, $sql)) { echo "OK - user ".$fbid." email: ".$femail; }
         else { echo "Fail: " . $sql . "<br>" . mysqli_error($conn); }   
    //mysqli_query($sql);
 }

PHP，为什么Mysqli没有更新？相反，它每次都会INSERT

0 个答案: