problem in upload images

i need to upload 9 images

this code is responsible for uploading all images

it works good but i have to problems :

1- slow page don't know why.
2- upload only 6 images not 9 and show error

// file vars
                    $path=$_FILES['products/']['tmp_name'];
                    $name=$_FILES['products/']['name'];
                    $size=$_FILES['products/']['size'];
                    $type=$_FILES['products/']['type'];
                    $error=$_FILES['products/']['error'];

					$j = 0; //Variable for indexing uploaded image

					$target_path = "products/"; //Declaring Path for uploaded images
				    for ($i = 0; $i < count($_FILES['file']['name']); $i++) {//loop to get individual element from the array

				        $validextensions = array("jpeg", "jpg", "png");  //Extensions which are allowed
				        $ext = explode('.', basename($_FILES['file']['name'][$i]));//explode file name from dot(.)
				        $file_extension = end($ext); //store extensions in the variable

						$target_path = $target_path . md5(uniqid()) . "." . $ext[count($ext) - 1];//set the target path with a new name of image
				        $j = $j + 1;//increment the number of uploaded images according to the files in array

						if (($_FILES["file"]["size"][$i] < 200000) //Approx. 200kb files can be uploaded.
				          && in_array($file_extension, $validextensions)) {
				            if (move_uploaded_file($_FILES['file']['tmp_name'][$i], $target_path)) {//if file moved to uploads folder

                                $sqlimage="INSERT INTO products_images (image_name,product_id) VALUES ('$target_path','$product_id')";

								$queryimage=mysqli_query($conn,$sqlimage);

				                echo $j. ').<span id="noerror">Image uploaded successfully!.</span><br/><br/>';
				            } else {//if file was not moved.
				                echo $j. ').<span id="error">please try again!.</span><br/><br/>';
				            }
				        } else {//if file size and file type was incorrect.
				            echo $j. ').<span id="error">***Invalid file Size (max 200kb) or Type (jpeg , jpg , png) ***</span><br/><br/>';
				        }
				    }

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error on page :

1).Image uploaded successfully!.

2).Image uploaded successfully!.

3).Image uploaded successfully!.

4).Image uploaded successfully!.

5).Image uploaded successfully!.

6).Image uploaded successfully!.


Warning: move_uploaded_file(products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg): failed to open stream: Invalid argument in C:\AppServ\www\*****\admin\addproducts.php on line 86

Warning: move_uploaded_file(): Unable to move 'C:\Windows\Temp\php9FED.tmp' to 'products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg' in C:\AppServ\www\*****\admin\addproducts.php on line 86
7).please try again!.


Warning: move_uploaded_file(products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg0d00018388fb3c8489743237544aa42f.jpg): failed to open stream: Invalid argument in C:\AppServ\www\******\admin\addproducts.php on line 86

Warning: move_uploaded_file(): Unable to move 'C:\Windows\Temp\php9FEE.tmp' to 'products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg0d00018388fb3c8489743237544aa42f.jpg' in C:\AppServ\www\******\admin\addproducts.php on line 86
8).please try again!.


Warning: move_uploaded_file(products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg0d00018388fb3c8489743237544aa42f.jpgd92b8e24565dc05f596aeedede0105d3.jpg): failed to open stream: Invalid argument in C:\AppServ\www\*****\admin\addproducts.php on line 86

Warning: move_uploaded_file(): Unable to move 'C:\Windows\Temp\php9FEF.tmp' to 'products/33b4179f8d76512f1a5fed14a0b8dfe0.jpgc949c46f9f94775d53ff1534a86f104d.jpg5fc3c7df9a6cc7485b31b06565ecb7f8.jpgb8a6e017c80539f138b97460d2649062.jpg61a6bdfb3732de16c90cd6c31d3b0289.jpg234c4ae6600450b57fc2bd143a7a98e9.jpg0d00018388fb3c8489743237544aa42f.jpg0d00018388fb3c8489743237544aa42f.jpgd92b8e24565dc05f596aeedede0105d3.jpg' in C:\AppServ\www\*******\admin\addproducts.php on line 86
9).please try again!.

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addproducts.php
products.php
script.js