Custom code for WP MAIL With Attachment

gistfile1.txt

 if(isset($_POST['photoupload_submit'])){
			
			$rand = rand(0000,9999);
			// Count total files
			$countfiles = count($_FILES['file']['name']);
			
			 
			
				$subject = "Payment received #$orderidnumber";
			    $message ='<p>You have reviced payment following order Id: ' . $activation_link . '</p>';
			
			    $headers[] = 'From: INOVA <website@doamin.com>' . "\r\n"; 
			    $headers[] = "Reply-To: $useremail \r\n"; 
			    
		

			// Looping all files
			for($i=0;$i<$countfiles;$i++){
				$filename = $_FILES['file']['name'][$i];

				// Upload file
				 $uploadfile = get_template_directory() .'/upload/'.$rand.$filename;
				 $filetempname = $_FILES['file']['tmp_name'][$i];
				 move_uploaded_file($filetempname, $uploadfile);
				 $attachment[$i] = $uploadfile;

			}
			 
			    
			      $file_to_upload = ABSPATH . '/wp-content/themes/inova/upload/'.$rand.$filename;  
			       $attachments = array( $file_to_upload);
			       
			       wp_mail($administratoremail, $subject, $message, $headers, $attachment);
			       
			       if(wp_mail){
			          echo "<h2 class='upload-photo-success-message'>Your file successfully submitted. You will receive a confirmation email soon.</h2>"; 
			       }
			       else{
			          echo "<h2>Error</h2>"; 
			       }
			 
		}