Question

我有这个代码，但在我运行之后，我看到一张空白图片;为什么？我正在尝试创建一个显示用户信息的myaccount页面。

if (isset($_SESSION['uid'])){
    $uid=  get_current_user();
    $sql = "SELECT uid, first,last,sem,email FROM user WHERE uid='$uid'";
    $cursor = mysqli_query($conn,$sql); // for example
    $result = mysqli_fetch_row($cursor);
    $n = mysqli_num_fields($cursor);
    while ($result) {
        for ($i=0; $i < $n; $i++) {
            $val= $result[$i];
            echo "$val,";
        }
        echo '<br>';
        $result = mysqli_fetch_row($cursor);
    }
    $conn->close();
}

Answer 1

if (isset($_SESSION['uid'])) {
$uid = $_SESSION['uid'];
$sql = "SELECT uid, first,last,sem,email FROM user WHERE uid='$uid'";
$cursor = mysqli_query($conn, $sql); // for example
$result = mysqli_fetch_row($cursor);
while ($result = mysqli_fetch_row($cursor)) {

    print_r($result);

    echo '<br>';


}


$conn->close();

}

Answer 2

也许您的$ _SESSION [＆＃39; uid＆＃39;]未设置？尝试回声。

空白页面 - 来自mysql的echo数据

2 个答案: