bind_param失敗但回聲bind_results返回我想要的？

Question

錯誤信息存在：

Fatal error: Call to a member function bind_param() on a non-object in /var/www/New/API/Constants.php on line 22

更新了整個constants.php 這是我在constants.php代碼：

session_start(); 
if (isset($_SESSION['real_name'])) 
{ 
    $username = $_SESSION['real_name']; 

    $InnerJoinQuery = $STD->prepare(" 
    SELECT Users.ID, Users.Password, UserInformation.LastName, UserInformation.Firstname, UserInformation.DOB 
    FROM Users 
    INNER JOIN UserInformation 
    ON Users.ID = UserInformation.UserID WHERE Users.Username = ?"); 
    $InnerJoinQuery->bind_param("s", $username); 
    $InnerJoinQuery->execute(); 
    $InnerJoinQuery->bind_result($UID, $Password, $LastName, $Firstname, $DOB); 
    $InnerJoinQuery->fetch(); 

    $_SESSION['UID'] = $UID; 
    $_SESSION['Password'] = $Password; 
    $_SESSION['Firstname'] = $LastName; 
    $_SESSION['LastName'] = $Firstname; 
    $_SESSION['DOB'] = $DOB; 
} 

    echo $UID."<br>".$Password."<br>".$LastName."<br>".$Firstname."<br>".$DOB; 

但是：

echo $UID."<br>".$Password."<br>".$LastName."<br>".$Firstname."<br>".$DOB; 

收益;

5 xxx Gill Daryl 211094

也：

print_r($_SESSION); 

Array ([real_name] => InhumaneSlayer [Password] => xxx [UID] => 5 [Firstname] => Gill [LastName] => Daryl [DOB] => 211094)

釷以上，預計輸出

這是正常嗎？所以bind_param失敗了，但是bind_results正在收集正確的信息？

Answer 1

如果這是你的全頁，你怎麼越來越$STD這我相信是你的連接變量。

如果您包括數據庫和來自不同頁面的此頁面.... 包括您的數據庫文件。

變化：

session_start(); 
if (isset($_SESSION['real_name'])) 
{ 

到：

include "YourFile"; 
session_start(); 
if (isset($_SESSION['real_name'])) 
{ 

Answer 2

使此：

​​

這樣：

session_start(); 
if (isset($_SESSION['real_name'])) 
{ 
    $username = $_SESSION['real_name']; 

............

$InnerJoinQuery->bind_param("s", $username); 

你檢查過會議是確定這是正在設置。我想你向後有姓和名：

$_SESSION['UID'] = $UID; 
$_SESSION['Password'] = $Password; 
$_SESSION['Firstname'] = $LastName; 
$_SESSION['LastName'] = $Firstname; 
$_SESSION['DOB'] = $DOB; 

嘗試呼應：

echo $_SESSION['UID']."<br/>" ; 
echo $_SESSION['Password']."<br/>" ; 
echo $_SESSION['Firstname']."<br/>" ; 
echo $_SESSION['LastName'] ."<br/>" ; 
echo $_SESSION['DOB'] ."<br/>" ; 
echo $_SESSION['real_name']."<br/>" ;