payme | Process online payments through the Atos Worldline gateway

I am create new extension payment gateway GCash on my OpenCart 3.0.3.3. I Copy the existing concept of Bank Transfer. But once I Install the new extension i encounter the error.

Fatal error: Uncaught Error: Class 'Controllerextensionpaymentgcash' not found in C:\xampp\storage\chaguan\storage\modification\system\engine\action.php:71 Stack trace: #0 C:\xampp\storage\chaguan\storage\modification\system\engine\loader.php(48): Action->execute(Object(Registry), Array) #1 C:\xampp\htdocs\chaguan2\admin\controller\extension\extension\payment.php(27): Loader->controller('extension/payme...') #2 C:\xampp\storage\chaguan\storage\modification\system\engine\action.php(79): ControllerExtensionExtensionPayment->install() #3 C:\xampp\htdocs\chaguan2\admin\controller\startup\router.php(26): Action->execute(Object(Registry), Array) #4 C:\xampp\storage\chaguan\storage\modification\system\engine\action.php(79): ControllerStartupRouter->index() #5 C:\xampp\htdocs\chaguan2\system\engine\router.php(67): Action->execute(Object(Registry)) #6 C:\xampp\htdocs\chaguan2\system\engine\router.php(56): Router->execute(Object(Action)) #7 C:\xampp\htdocs\chaguan2\system\framework.php(165): Router->dispatch(Object(Action), Object( in C:\xampp\storage\chaguan\storage\modification\system\engine\action.php on line 71

How can I resolve following errors?

For reference this is my code:

Controller Path:

admin\controller\extension\payment\gcash.php

I have a WKWebView, the webview will load a link like https://qr.payme.hsbc.com/2/XXXXYYYZZZ.

And there two possible results when the link is loaded,
case 1 is an app called Payme will be opened when user has installed Payme app;
case 2 is webview will be redirected to a static page https://payme.hsbc.com/ when user has not installed Payme app.

My question is how can I know if the Payme app is opened?

I started working with angular almost a whole week ago. And to make things easy I am trying to implement a paypal-checkout.

The checkout works fine, as long as I only pass the total amount. But I would like to pass several items to paypal.

I tried it this way:

Hello I am trying to redirect to a php file that I created in an existing project using the header function but it is not working and I am getting 404 not found as a result.

Here is the line I wrote:

I have a string here for practice.

I am getting all "items" entries from firebase database here. What actually need it to give me only the entries from specific unique key

I have a Firebase database and I want to retreive a list of data from there and store into ArrayList.

Product model is fine, working.

I am implementing Stripe Payment Gateway with React Native, and I am using react-native-stripe-api

I have a small angular app I have made that works fine on my computer, but does not work properly on any mobile device. The problem is the form submit button. The button will not submit form and hitting the return key on my ipad on the last form field directs back to the card number form field and says "Match the requested format" ... I am using Stripe by the way.

I have tried ngSubmit on the form and changed the button around to input type and type button and etc. I have also got rid of ngSubmit and used (click)="buy()" which also works on a desktop, but not on a mobile device. I have even added (tap) from hammerjs just in case it was a touch issue. I tried using a label outside of the form linked to the submit button. None of which work. I added an alert to just see if the button was even being clicked, and it is, the mobile device will show the alert, but wont submit the form. So, please ignore the the code at the bottom where I have multiple buttons a labels, it was for testing purposes (it all works on desktop though as is, just not on any mobile device).

Here are two pics of the problem:

https://drive.google.com/file/d/18grWfXyQN9gvcuJRuUqIoS_yjMsU1vii/view?usp=sharing) https://drive.google.com/file/d/1ezhyAtTg1Z1OomLd9pv47Bif-0ILOR5b/view?usp=sharing