Image Uploading and Signup Code - php

Question

Here is my code for image upload and inserting data into a Database, but it is not working properly, and also not showing any errors.
<?php
if(isset($_Post['submitbtn']))
{
$target_dir = "Resources/images/users/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
// Check if image file is a actual image or fake image
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image.";
$uploadOk = 0;
}
if (file_exists($target_file))
{
echo "Sorry, file already exists.";
$uploadOk = 0;
}
if (file_exists($target_file))
{
echo "Sorry, file already exists.";
$uploadOk = 0;
}
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" )
{
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}
if ($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.";
}
}
$qur = "insert into users values ('"+$_Post['Id']+"','"+$_Post['firstname']+"','"+$_Post['lastname']+"','"+$_Post['email']+"','"+$_Post['Password']+"','"+'shopkeeper'+"','"+$target_file+"')";
if(mysqli_query($con,$qur))
{
echo "Data Saved";
}
else
{
die("Connection failed: " . mysqli_error());
}
}
?>