/home/kueuepay/public_html/vendor/psy/psysh/src/CodeCleaner/IssetPass.php
<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\CodeCleaner;

use PhpParser\Node;
use PhpParser\Node\Expr\ArrayDimFetch;
use PhpParser\Node\Expr\Isset_;
use PhpParser\Node\Expr\NullsafePropertyFetch;
use PhpParser\Node\Expr\PropertyFetch;
use PhpParser\Node\Expr\Variable;
use Psy\Exception\FatalErrorException;

/**
 * Code cleaner pass to ensure we only allow variables, array fetch and property
 * fetch expressions in isset() calls.
 */
class IssetPass extends CodeCleanerPass
{
    const EXCEPTION_MSG = 'Cannot use isset() on the result of an expression (you can use "null !== expression" instead)';

    /**
     * @throws FatalErrorException
     *
     * @param Node $node
     *
     * @return int|Node|null Replacement node (or special return value)
     */
    public function enterNode(Node $node)
    {
        if (!$node instanceof Isset_) {
            return;
        }

        foreach ($node->vars as $var) {
            if (!$var instanceof Variable && !$var instanceof ArrayDimFetch && !$var instanceof PropertyFetch && !$var instanceof NullsafePropertyFetch) {
                throw new FatalErrorException(self::EXCEPTION_MSG, 0, \E_ERROR, null, $node->getStartLine());
            }
        }
    }
}
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Kueue Pay Payment Gateway Solutions Developer API Documentation

Welcome to the Kueue Pay Payment Gateway Solutions Developer API Documentation. This comprehensive guide will empower you to seamlessly integrate our advanced payment gateway into your website, enhancing your customers’ payment experience and enabling efficient transaction processing. The Kueue Pay Developer API is designed for developers and entrepreneurs who seek simplicity, security, and reliability in their payment processing solutions.

1. Introduction

The Kueue Pay Developer API allows you to seamlessly integrate Kueue Pay’s Payment Gateway Solutions into your website, enabling secure and efficient debit and credit card transactions. With our API, you can initiate payments, check payment statuses, and even process refunds, all while ensuring a smooth and streamlined payment experience for your customers.

Prerequisites