PHP - Post Error Upon Uploading A File

Hey all

So have been working on a file upload script, it was uploading the file but also adding the path name instead of NULL to mysql when no image was to upload, that is now fixed however now it won't upload the actual image to the directory.  I tried undoing the mysql changes but it still won't upload the image to the directory.  Am testing on my own computer using xampp so no file permission issues, plus it was working before.  Any help much appreciated.

Thanks

              <?php
              $product_code = mysqli_real_escape_string($conn, $_POST['product_code']);
              $product_name = mysqli_real_escape_string($conn, $_POST['product_name']);
              $category = mysqli_real_escape_string($conn, $_POST['category']);
              $filter = mysqli_real_escape_string($conn, $_POST['filter']);
              $description = mysqli_real_escape_string($conn, $_POST['description']);
              $specification = mysqli_real_escape_string($conn, $_POST['specification']);
              $price = mysqli_real_escape_string($conn, $_POST['price']);

              $target_dir = "../images/products/";

              if (!isset ($_FILES["img1"]["name"])) {
                  $target_file1 = NULL;
              } else {
                  if (!empty($_FILES["img1"]["name"])) {
                      $target_file1 = $target_dir . basename($_FILES["img1"]["name"]);
                  } else {
                      $target_file1 = NULL;
                  }
              }

              if (!isset ($_FILES["img2"]["name"])) {
                  $target_file2 = NULL;
              } else {
                  if (!empty($_FILES["img2"]["name"])) {
                      $target_file2 = $target_dir . basename($_FILES["img2"]["name"]);
                  } else {
                      $target_file2 = NULL;
                  }
              }

              if (!isset ($_FILES["img3"]["name"])) {
                  $target_file3 = NULL;
              } else {
                  if (!empty($_FILES["img3"]["name"])) {
                      $target_file3 = $target_dir . basename($_FILES["img3"]["name"]);
                  } else {
                      $target_file3 = NULL;
                  }
              }

              if (!isset ($_FILES["img4"]["name"])) {
                  $target_file4 = NULL;
              } else {
                  if (!empty($_FILES["img4"]["name"])) {
                      $target_file4 = $target_dir . basename($_FILES["img4"]["name"]);
                  } else {
                      $target_file4 = NULL;
                  }
              }


              $uploadOk = 1;
              $imageFileType1 = strtolower(pathinfo($target_file1,PATHINFO_EXTENSION));
              $imageFileType2= strtolower(pathinfo($target_file2,PATHINFO_EXTENSION));
              $imageFileType3 = strtolower(pathinfo($target_file3,PATHINFO_EXTENSION));
              $imageFileType4 = strtolower(pathinfo($target_file4,PATHINFO_EXTENSION));

              // Check if image file is a actual image or fake image
              if(isset($_POST["submit"])) {
                $check1 = getimagesize($_FILES["img1"]["tmp_name"]);
                $check2 = getimagesize($_FILES["img2"]["tmp_name"]);
                $check3 = getimagesize($_FILES["img3"]["tmp_name"]);
                $check4 = getimagesize($_FILES["img4"]["tmp_name"]);

                if($check1 !== false) {
                  echo "File is an image - " . $check1["mime"] . ".";
                  $uploadOk = 1;
                } else {
                  echo "File is not an image.";
                  $uploadOk = 0;
                }
                if (file_exists($target_file1)) {
                  echo "Sorry, image one already exists.";
                  $uploadOk = 0;
                }
                if($imageFileType1 != "jpg" && $imageFileType1 != "png" && $imageFileType1 != "jpeg"
                && $imageFileType1 != "gif" ) {
                  echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed for img1.";
                  $uploadOk = 0;
                }
                if ($uploadOk == 0) {
                  echo "Sorry, your file was not uploaded.";
                // if everything is ok, try to upload file
                } else {
                  if (move_uploaded_file($_FILES["img1"]["tmp_name"], $target_file1)) {
                    echo "The file ". htmlspecialchars( basename( $_FILES["img1"]["name"])). " has been uploaded.";
                  } else {
                    echo "Sorry, there was an error uploading image one.";
                  }
                    }
                    echo '<br />';


                if($check2 !== false) {
                  echo "File is an image - " . $check2["mime"] . ".";
                  $uploadOk = 1;
                } else {
                  echo "File is not an image.";
                  $uploadOk = 0;
                }
                if (file_exists($target_file2)) {
                  echo "Sorry, image two already exists.";
                  $uploadOk = 0;
                }
                if($imageFileType2 != "jpg" && $imageFileType2 != "png" && $imageFileType2 != "jpeg"
                && $imageFileType2 != "gif" ) {
                  echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed for img2.";
                  $uploadOk = 0;
                }
                if (isset ($target_file2)) {
                    if ($uploadOk == 0) {
                      echo "Sorry, your file was not uploaded.";
                    // if everything is ok, try to upload file
                    } else {
                    if (move_uploaded_file($_FILES["img2"]["tmp_name"], $target_file2)) {
                      echo "The file ". htmlspecialchars( basename( $_FILES["img1"]["name"])). " has been uploaded.";
                    } else {
                      echo "Sorry, there was an error uploading image two.";
                    }
                      }
                    }
                                        echo '<br />';



                if($check3 !== false) {
                  echo "File is an image - " . $check3["mime"] . ".";
                  $uploadOk = 1;
                } else {
                  echo "File is not an image.";
                  $uploadOk = 0;
                }
                if (file_exists($target_file3)) {
                    echo "Sorry, image three already exists.";
                    $uploadOk = 0;
                  }
                  if($imageFileType3 != "jpg" && $imageFileType3 != "png" && $imageFileType3 != "jpeg"
                    && $imageFileType3 != "gif" ) {
                      echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed for img3.";
                      $uploadOk = 0;
                    }
                    if (isset ($target_file3)) {
                      if ($uploadOk == 0) {
                        echo "Sorry, your file was not uploaded.";
                      // if everything is ok, try to upload file
                      } else {
                      if (move_uploaded_file($_FILES["img3"]["tmp_name"], $target_file3)) {
                        echo "The file ". htmlspecialchars( basename( $_FILES["img3"]["name"])). " has been uploaded.";
                      } else {
                        echo "Sorry, there was an error uploading image three.";
                      }
                        }
                      }
                                          echo '<br />';


                if($check4 !== false) {
                  echo "File is an image - " . $check4["mime"] . ".";
                  $uploadOk = 1;
                } else {
                  echo "File is not an image.";
                  $uploadOk = 0;
                }
                if (file_exists($target_file4)) {
                      echo "Sorry, image four already exists.";
                      $uploadOk = 0;
                    }
                    if($imageFileType4 != "jpg" && $imageFileType4 != "png" && $imageFileType4 != "jpeg"
                      && $imageFileType4 != "gif" ) {
                        echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed for img4.";
                        $uploadOk = 0;
                      }
                      if (isset ($target_file4)) {
                        if ($uploadOk == 0) {
                          echo "Sorry, your file was not uploaded.";
                        // if everything is ok, try to upload file
                        } else {
                        if (move_uploaded_file($_FILES["img4"]["tmp_name"], $target_file4)) {
                          echo "The file ". htmlspecialchars( basename( $_FILES["img4"]["name"])). " has been uploaded.";
                        } else {
                          echo "Sorry, there was an error uploading image four.";
                        }
                      }
              }
}

  echo '<br />';

$image1 = basename($target_file1);
$image2 = basename($target_file2);
$image3 = basename($target_file3);
$image4 = basename($target_file4);


// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
  die("Connection failed: " . mysqli_connect_error());
}
$sql = "INSERT INTO products (product_code, product_name, category, filter, description, specification, img1, img2, img3, img4, price) VALUES('$product_code', '$product_name', '$category', '$filter', '$description', '$specification', '$image1', '$image2', '$image3', '$image4', '$price')";

if (mysqli_query($conn, $sql)) {
  echo "Product Added successfully, Now on to the Sizes";
} else {
  echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
              ?>