Showing Image and uploading the image problem - php

Question

I having a problem getting image and store them in database
The problem is it's showing that pimage is Undefined and the image I choose is not storing in the database
This is the Image when I try to submit it to show you what the problem is
This is my database look like
It's not storing my image
$fol = $_POST['folder'];
$lin = $_POST['link'];
$target_dir="image/";
$target_file=$target_dir.basename($_FILES['pimage']['name']);
move_uploaded_file($_FILES['pimage']['tmp_name'],$target_file);
if(empty($fol)){
echo "<div class='alert-danger'><i class='fa fa-exclamation-circle'>
<strong>Please Enter Folder Name</strong>
</i></div>";
}
if(empty($lin)) {
echo "<div class='alert-danger'><i class='fa fa-exclamation-circle'>
<strong>Please Enter Link</strong>
</i></div>";
}
else{
$sql="SELECT id FROM filelink WHERE folder_name ='$fol' LIMIT 1";
$check_query =mysqli_query($conn,$sql);
$count_folder = mysqli_num_rows($check_query);
if($count_folder>0){
echo "<div class='alert-danger'><i class='fa fa-exclamation-circle'>
<strong>Sorry Folder Name Already Exist</strong>
</i></div>";
}
else{
$sql ="INSERT INTO filelink(link,folder_name,folder_image)VALUES('$lin','$fol','$target_file')";
$run_query=mysqli_query($conn,$sql);
if($run_query){
echo "<div class='alert-success'>
<strong>Add File Successful Refresh Page to see Change</strong></i>
</div>";
}
}
}
<div class="form-popup" id="myForm">
<form action="/action_page.php" enctype="multipart/form-data" class="form-container">
<div id="e_msg" style="font-size: 13; text-align: center; margin-bottom: 10px; margin-top: 15px;">
<!-- message for adding file if success-->
</div>
<label for="folder"><b>Folder</b></label>
<input type="text" placeholder="Enter Folder Name" name="folder" required>
<label for="link"><b>Link</b></label>
<input type="text" placeholder="Enter Link" name="link" required>
<div class="custom-file">
<input type="file" name="pimage" class="custom-file-input" id="customFile" required>
<label for ="customFile" class="custom-file-label">Choose Product Image</label>
</div>
<button style="margin-top: 15px;" type="submit" class="btn btnsub">Submit</button>
Close
</form>
</div>