<?php

/**
 * Definition that allows a set of elements, but disallows empty children.
 */
class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
{
    /**
     * Lookup table of allowed elements.
     * @type array
     */
    public $elements = array();

    /**
     * Whether or not the last passed node was all whitespace.
     * @type bool
     */
    protected $whitespace = false;

    /**
     * @param array|string $elements List of allowed element names (lowercase).
     */
    public function __construct($elements)
    {
        if (is_string($elements)) {
            $elements = str_replace(' ', '', $elements);
            $elements = explode('|', $elements);
        }
        $keys = array_keys($elements);
        if ($keys == array_keys($keys)) {
            $elements = array_flip($elements);
            foreach ($elements as $i => $x) {
                $elements[$i] = true;
                if (empty($i)) {
                    unset($elements[$i]);
                } // remove blank
            }
        }
        $this->elements = $elements;
    }

    /**
     * @type bool
     */
    public $allow_empty = false;

    /**
     * @type string
     */
    public $type = 'required';

    /**
     * @param array $children
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return array
     */
    public function validateChildren($children, $config, $context)
    {
        // Flag for subclasses
        $this->whitespace = false;

        // if there are no tokens, delete parent node
        if (empty($children)) {
            return false;
        }

        // the new set of children
        $result = array();

        // whether or not parsed character data is allowed
        // this controls whether or not we silently drop a tag
        // or generate escaped HTML from it
        $pcdata_allowed = isset($this->elements['#PCDATA']);

        // a little sanity check to make sure it's not ALL whitespace
        $all_whitespace = true;

        $stack = array_reverse($children);
        while (!empty($stack)) {
            $node = array_pop($stack);
            if (!empty($node->is_whitespace)) {
                $result[] = $node;
                continue;
            }
            $all_whitespace = false; // phew, we're not talking about whitespace

            if (!isset($this->elements[$node->name])) {
                // special case text
                // XXX One of these ought to be redundant or something
                if ($pcdata_allowed && $node instanceof HTMLPurifier_Node_Text) {
                    $result[] = $node;
                    continue;
                }
                // spill the child contents in
                // ToDo: Make configurable
                if ($node instanceof HTMLPurifier_Node_Element) {
                    for ($i = count($node->children) - 1; $i >= 0; $i--) {
                        $stack[] = $node->children[$i];
                    }
                    continue;
                }
                continue;
            }
            $result[] = $node;
        }
        if (empty($result)) {
            return false;
        }
        if ($all_whitespace) {
            $this->whitespace = true;
            return false;
        }
        return $result;
    }
}

// vim: et sw=4 sts=4

• [F] Chameleon.php
  Delete
• [F] Custom.php
  Delete
• [F] Empty.php
  Delete
• [F] List.php
  Delete
• [F] Optional.php
  Delete
• [F] Required.php
  Delete
• [F] StrictBlockquote.php
  Delete
• [F] Table.php
  Delete

About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard