php - PHP准备好的语句未执行

Question

我只是重写了一些PHP代码以使其更安全，但出现了问题。我的代码假设将用户个人资料图片保存在uploads文件夹中，然后将其保存到数据库中，然后显示给他们。但这没有发生。唯一发生的是图片被保存在uploads文件夹中，仅此而已。我没有任何错误。有人可以帮我修复我的代码吗？

更新！

我只是尝试了这段代码：

$username = isset($_SESSION['username']) ? $_SESSION['username'] : "";
$userPic = isset($_SESSION['userPic']) ? $_SESSION['userPic'] : "";
var_dump($userPic);


$info = date('Y-m-d_H-i-s');

if(!empty($username))
{
    if (isset($_FILES['fileToUpload'])) {

      $errors= array();
      $file_name = $_FILES['fileToUpload']['name'];
      $file_size = $_FILES['fileToUpload']['size'];
      $width = 1500;
      $height = 1500;
      $file_tmp = $_FILES['fileToUpload']['tmp_name'];
      $file_type = $_FILES['fileToUpload']['type'];
      $tmp = explode('.',$_FILES['fileToUpload']['name']);
      $file_ext=strtolower (end ($tmp));

      $extensions= array("jpeg","jpg","png");

      if(in_array($file_ext,$extensions)=== false){
         $errors[]="extension not allowed, please choose a JPEG or PNG file.";
      }

       if ($file_size > 8097152) {
        $errors[] = 'File size must be 2 MB';
    }

      if ($width > 1500 || $height > 1500) {
            echo"File is to large";
      }

      if(empty($errors)==true)
      {
         move_uploaded_file($file_tmp,"uploads/".date('Y-m-d_H-i-s').$file_name);

      $stmt = $conn->prepare("UPDATE users SET userPic=?, date_time=? WHERE username"); 

      $stmt->bind_param('ss', $userPic, $date_time);

      /* execute prepared statement */
       $stmt->execute();

     printf("%d Row inserted.\n", $conn->affected_rows);

     /* close statement and connection */

      }else{
         print_r($errors);
         echo"Couldn't upload picture";
      }

}}
else
{
    echo "Invalid Username";
}

这就是我得到的-1 Row inserted.

Answer 1

尝试这个

$stmt = $conn->prepare("UPDATE users SET userPic=?, date_time=? ");


$stmt->bind_param('ss', $userPic, $date_time);

$userPic = 'pic url';
$date_time = 'date';


/* execute prepared statement */
$stmt->execute();

printf("%d Row inserted.\n", $stmt->affected_rows);

/* close statement and connection */
$stmt->close();