使用php上传的图片无法正常使用

Question

The problem is this one:

I have a code that uploads a picture to phpmyadmin, the code... doesn't fully work for some reason, it doesn't upload the image fully and the image ends up having a very small size, and it won't show up either. If I upload them directly to the database, they can be shown, but the ones uploaded using the code below have that problem.

This is the code I have:

Code for the button:

   <div id="content">
<form method="POST" action =""/>
    <table>
     <tr>
      <td>
        Upload a picture
      </td>
      <td>
        <input type="file" name="image"/>
      </td>
  </tr>
 </table>
 <input type="submit" name="submit" value="Registrarme"/> <input type="reset"/> 

</form>
<?php
if(isset($_POST['submit'])){
  require("iniciar.php");
    }
 ?>
</div>

Code for the uploading: (iniciar.php)

<?php
$image = $_POST['image'];
$reqlen = strlen($image);
if($reqlen > 0){
$conn = mysqli_connect('localhost','root','','image');
$sql = "INSERT INTO `images` VALUES ('', '$image', '')";
mysqli_query($conn, $sql);
echo 'Upload successful';
}else{
echo 'Please insert an image';  
}
?>

This is the structure of the table: The table I have

Answer 1

you're assigning like input data instead of

            $_FILES["image"]["name"];

         //remove thisline
    $image=$_POST['evidence'];
// you have to use it like this

     $image=   $_FILES["image"]["name"];

you have to assign image like this

$target_file =  $target_dir . '/' . basename($_FILES["image"]["name"]);
$image=$target_file;

now evidence hold address of image so dir. of image is now on evidence too.now it will be uploaded to data base you aren't passing data. that's the mistake. any questions comment .if it solves your problem mark it as solved :)

for reference ,this is the php script used to upload profile picture,

  <?php
if(isset($_POST["submit"])) 
    {
        $target_dir = "profilepic/";
        $targetfile=$target_dir.basename($_FILES["fileToUpload"]["name"]);
        $uploadOk = 1;
        $imageFileType = pathinfo($targetfile,PATHINFO_EXTENSION);

        if($imageFileType != "jpg" &&$imageFileType != "JPG" && $imageFileType != "png" && $imageFileType != "PNG" && $imageFileType != "jpeg" && $imageFileType != "JPEG" && $imageFileType != "gif" && $imageFileType != "GIF" ) 
        {
        echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
        $uploadOk = 0;

        }
        if ($uploadOk == 0) 
        {
        echo "<small>Sorry, your file was not uploaded.</small>";
        }
         else 
         {
         if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $targetfile)) 
         {
           echo "<small>upload successful</small>";
           $imgdir="UPDATE user SET profilepic='$targetfile' WHERE username='$uname';";
           $con->query($imgdir);
           header("location:profile.php");

         }
         else
          echo "not uploaded";
         } 
    }
?>

make changes according to your data base & operations.