title: Error : Undefined index - PHP, MySql
body: <p>I am inserting profile image in folder and in database table, image is well uploaded to the "uploads" folder, but not inserting in mysql database table. I am getting this error:</p>
  
  <p><code>Notice: Undefined index: fileToUpload in C:\wamp\www\project\upload_image.php on line 10</code></p>
  
  <p>From the following code:</p>
  
  <p><code>upload_image.php</code></p>
  
  <pre><code>&lt;?php
  include_once('dbconn.php');
  $target_dir = "uploads/";
  $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
  $uploadOk = 1;
  $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
  
  // Check if image file is a actual image or fake image
  if(isset($_POST["submit"])) {
    $user_id = $_POST['user_id'];
    $fileToUpload = $_POST['fileToUpload'];
    $sql="INSERT INTO profile_image (user_id,fileToUpload) VALUES ('$user_id', '$fileToUpload')";
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
      echo "File is an image - " . $check["mime"] . ".";
      $uploadOk = 1;
    } 
    else {
      echo "File is not an image.";
      $uploadOk = 0;
    }
  }
  
  // Check if file already exists
      if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
      }
  
  // Check file size
  if ($_FILES["fileToUpload"]["size"] &gt; 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
  }
  
  // Allow certain file formats
  if($imageFileType != "jpg" &amp;&amp; $imageFileType != "png" &amp;&amp; $imageFileType != "jpeg" &amp;&amp; $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG &amp; GIF files are allowed.";
    $uploadOk = 0;
  }
  
  // Check if $uploadOk is set to 0 by an error
  if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
    // if everything is ok, try to upload file
  } 
  else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))     {
      echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } 
    else {
      echo "Sorry, there was an error uploading your file.";
    }
  }
  ?&gt;
  </code></pre>
  
  <p><code>HTML code</code></p>
  
  <pre><code>&lt;form method="post" action="upload_image.php" enctype="multipart/form-data"&gt;
    &lt;?php if(isset($_SESSION['email'])){?&gt;
    &lt;input type="hidden" name="user_id" value="&lt;?php echo ($_SESSION['id']);}else{header("Location: login.php");}?&gt;"&gt;
    &lt;input type="file" name="fileToUpload"&gt;
    &lt;input type="submit" value="Upload" name="submit"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>Does anyone know how to fix this?</p>