mysql_query(): 用户 ''@'localhost' 的访问被拒绝

Question

我看到有很多类似的问题，但我没有找到任何人有类似的代码。

脚本将文件上传到服务器，但我还想插入有关已上传文件的数据。文件按应有的方式上传，没有错误，但 phpmyadmin 中的 table 保持为空。

error_log 中的错误：

PHP Warning:  mysql_query(): Access denied for user ''@'localhost' (using password: NO) in *path*/upload.php on line 65
PHP Warning:  mysql_query(): A link to the server could not be established in *path*/upload.php on line 65

当我在网站上得到输出 "Localhost via UNIX socket 127.0.0.1 via TCP/IP" 而不是 mysql warning/error 时，连接似乎正常工作。

连接脚本（uploadconnect.php）：

<?php
$mysqli = new mysqli("localhost", "*username*", "*password*", "*database*");
    if ($mysqli->connect_errno) {
        echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
    }
    echo $mysqli->host_info . "\n";

    $mysqli = new mysqli("127.0.0.1", "*username*", "*password*", "*database*", 3306);
    if ($mysqli->connect_errno) {
        echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
    }

    echo $mysqli->host_info . "\n";
    ?>

上传PHP脚本：

<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post" enctype="multipart/form-data">
<input type="file" name="file" />
<button type="submit" name="btn-upload">upload</button>
</form>

    <?php
    include_once 'uploadconnect.php';
    if(isset($_POST['btn-upload']))
    {    

     $file = rand(1000,100000)."-".$_FILES['file']['name'];
        $file_loc = $_FILES['file']['tmp_name'];
     $file_size = $_FILES['file']['size'];
     $file_type = $_FILES['file']['type'];
     $folder="uploads/";

     $new_size = $file_size/1024;  

     $new_file_name = strtolower($file);

     $final_file=str_replace(' ','-',$new_file_name);

     if(move_uploaded_file($file_loc,$folder.$final_file))
     {
      $sql="INSERT INTO uploadedfiles(file,type,size) VALUES('$final_file','$file_type','$new_size')";
      mysql_query($sql);  #<--- LINE 65
      ?>
      <script>
      alert('successfully uploaded');
            window.location.href='upload.php?success';
            </script>
      <?php
     }
     else
     {
      ?>
      <script>
      alert('error while uploading file');
            window.location.href='upload.php?fail';
            </script>
      <?php
     }
    }
    ?>

错误似乎出现在上传文件第 65 行的 "mysql_query($sql);"。

Answer 1

您已使用 mysqli 创建了数据库连接。这不适用于 obsolete mysql 图书馆。始终如一地使用 mysqli。