About

<?php declare(strict_types=1); /* * This file is part of the league/commonmark package. * * (c) Colin O'Dell <colinodell@gmail.com> * * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) * - (c) John MacFarlane * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace League\CommonMark\Util; use League\CommonMark\Exception\InvalidArgumentException; use League\CommonMark\Extension\CommonMark\Node\Block\HtmlBlock; /** * Provides regular expressions and utilities for parsing Markdown * * All of the PARTIAL_ regex constants assume that they'll be used in case-insensitive searches * All other complete regexes provided by this class (either via constants or methods) will have case-insensitivity enabled. * * @phpcs:disable Generic.Strings.UnnecessaryStringConcat.Found * * @psalm-immutable */ final class RegexHelper { // Partial regular expressions (wrap with `/` on each side and add the case-insensitive `i` flag before use) public const PARTIAL_ENTITY = '&(?:#x[a-f0-9]{1,6}|#[0-9]{1,7}|[a-z][a-z0-9]{1,31});'; public const PARTIAL_ESCAPABLE = '[!"#$%&\'()*+,.\/:;<=>?@[\\\\\]^_`{|}~-]'; public const PARTIAL_ESCAPED_CHAR = '\\\\' . self::PARTIAL_ESCAPABLE; public const PARTIAL_IN_DOUBLE_QUOTES = '"(' . self::PARTIAL_ESCAPED_CHAR . '|[^"\x00])*"'; public const PARTIAL_IN_SINGLE_QUOTES = '\'(' . self::PARTIAL_ESCAPED_CHAR . '|[^\'\x00])*\''; public const PARTIAL_IN_PARENS = '\$(' . self::PARTIAL_ESCAPED_CHAR . '|[^)\x00])*\$'; public const PARTIAL_REG_CHAR = '[^\\\$)\x00-\x20]'; public const PARTIAL_IN_PARENS_NOSP = '\((' . self::PARTIAL_REG_CHAR . '|' . self::PARTIAL_ESCAPED_CHAR . '|\\\$*\)'; public const PARTIAL_TAGNAME = '[a-z][a-z0-9-]*'; public const PARTIAL_BLOCKTAGNAME = '(?:address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h1|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|nav|noframes|ol|optgroup|option|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)'; public const PARTIAL_ATTRIBUTENAME = '[a-z_:][a-z0-9:._-]*'; public const PARTIAL_UNQUOTEDVALUE = '[^"\'=<>`\x00-\x20]+'; public const PARTIAL_SINGLEQUOTEDVALUE = '\'[^\']*\''; public const PARTIAL_DOUBLEQUOTEDVALUE = '"[^"]*"'; public const PARTIAL_ATTRIBUTEVALUE = '(?:' . self::PARTIAL_UNQUOTEDVALUE . '|' . self::PARTIAL_SINGLEQUOTEDVALUE . '|' . self::PARTIAL_DOUBLEQUOTEDVALUE . ')'; public const PARTIAL_ATTRIBUTEVALUESPEC = '(?:' . '\s*=' . '\s*' . self::PARTIAL_ATTRIBUTEVALUE . ')'; public const PARTIAL_ATTRIBUTE = '(?:' . '\s+' . self::PARTIAL_ATTRIBUTENAME . self::PARTIAL_ATTRIBUTEVALUESPEC . '?)'; public const PARTIAL_OPENTAG = '<' . self::PARTIAL_TAGNAME . self::PARTIAL_ATTRIBUTE . '*' . '\s*\/?>'; public const PARTIAL_CLOSETAG = '<\/' . self::PARTIAL_TAGNAME . '\s*[>]'; public const PARTIAL_OPENBLOCKTAG = '<' . self::PARTIAL_BLOCKTAGNAME . self::PARTIAL_ATTRIBUTE . '*' . '\s*\/?>'; public const PARTIAL_CLOSEBLOCKTAG = '<\/' . self::PARTIAL_BLOCKTAGNAME . '\s*[>]'; public const PARTIAL_HTMLCOMMENT = '|'; public const PARTIAL_PROCESSINGINSTRUCTION = '[<][?][\s\S]*?[?][>]'; public const PARTIAL_DECLARATION = '<![A-Z]+' . '[^>]*>'; public const PARTIAL_CDATA = '<!\[CDATA\[[\s\S]*?]\]>'; public const PARTIAL_HTMLTAG = '(?:' . self::PARTIAL_OPENTAG . '|' . self::PARTIAL_CLOSETAG . '|' . self::PARTIAL_HTMLCOMMENT . '|' . self::PARTIAL_PROCESSINGINSTRUCTION . '|' . self::PARTIAL_DECLARATION . '|' . self::PARTIAL_CDATA . ')'; public const PARTIAL_HTMLBLOCKOPEN = '<(?:' . self::PARTIAL_BLOCKTAGNAME . '(?:[\s\/>]|$)' . '|' . '\/' . self::PARTIAL_BLOCKTAGNAME . '(?:[\s>]|$)' . '|' . '[?!])'; public const PARTIAL_LINK_TITLE = '^(?:"(' . self::PARTIAL_ESCAPED_CHAR . '|[^"\x00])*"' . '|' . '\'(' . self::PARTIAL_ESCAPED_CHAR . '|[^\'\x00])*\'' . '|' . '$(' . self::PARTIAL_ESCAPED_CHAR . '|[^()\x00])*$)'; public const REGEX_PUNCTUATION = '/^[\x{2000}-\x{206F}\x{2E00}-\x{2E7F}\p{Pc}\p{Pd}\p{Pe}\p{Pf}\p{Pi}\p{Po}\p{Ps}\\\\\'!"#\$%&\*\+,\-\.\\/:;<=>\?@\[\]\^_`\{\|\}~]/u'; public const REGEX_UNSAFE_PROTOCOL = '/^javascript:|vbscript:|file:|data:/i'; public const REGEX_SAFE_DATA_PROTOCOL = '/^data:image\/(?:png|gif|jpeg|webp)/i'; public const REGEX_NON_SPACE = '/[^ \t\f\v\r\n]/'; public const REGEX_WHITESPACE_CHAR = '/^[ \t\n\x0b\x0c\x0d]/'; public const REGEX_UNICODE_WHITESPACE_CHAR = '/^\pZ|\s/u'; public const REGEX_THEMATIC_BREAK = '/^(?:\*[ \t]*){3,}$|^(?:_[ \t]*){3,}$|^(?:-[ \t]*){3,}$/'; public const REGEX_LINK_DESTINATION_BRACES = '/^(?:<(?:[^<>\\n\\\\\\x00]|\\\\.)*>)/'; /** * @psalm-pure */ public static function isEscapable(string $character): bool { return \preg_match('/' . self::PARTIAL_ESCAPABLE . '/', $character) === 1; } /** * @psalm-pure */ public static function isLetter(?string $character): bool { if ($character === null) { return false; } return \preg_match('/[\pL]/u', $character) === 1; } /** * Attempt to match a regex in string s at offset offset * * @psalm-param non-empty-string $regex * * @return int|null Index of match, or null * * @psalm-pure */ public static function matchAt(string $regex, string $string, int $offset = 0): ?int { $matches = []; $string = \mb_substr($string, $offset, null, 'UTF-8'); if (! \preg_match($regex, $string, $matches, \PREG_OFFSET_CAPTURE)) { return null; } // PREG_OFFSET_CAPTURE always returns the byte offset, not the char offset, which is annoying $charPos = \mb_strlen(\mb_strcut($string, 0, $matches[0][1], 'UTF-8'), 'UTF-8'); return $offset + $charPos; } /** * Functional wrapper around preg_match_all which only returns the first set of matches * * @psalm-param non-empty-string $pattern * * @return string[]|null * * @psalm-pure */ public static function matchFirst(string $pattern, string $subject, int $offset = 0): ?array { if ($offset !== 0) { $subject = \substr($subject, $offset); } \preg_match_all($pattern, $subject, $matches, \PREG_SET_ORDER); if ($matches === []) { return null; } return $matches[0] ?: null; } /** * Replace backslash escapes with literal characters * * @psalm-pure */ public static function unescape(string $string): string { $allEscapedChar = '/\\\\(' . self::PARTIAL_ESCAPABLE . ')/'; $escaped = \preg_replace($allEscapedChar, '$1', $string); \assert(\is_string($escaped)); return \preg_replace_callback('/' . self::PARTIAL_ENTITY . '/i', static fn ($e) => Html5EntityDecoder::decode($e[0]), $escaped); } /** * @internal * * @param int $type HTML block type * * @psalm-param HtmlBlock::TYPE_* $type * * @phpstan-param HtmlBlock::TYPE_* $type * * @psalm-return non-empty-string * * @throws InvalidArgumentException if an invalid type is given * * @psalm-pure */ public static function getHtmlBlockOpenRegex(int $type): string { switch ($type) { case HtmlBlock::TYPE_1_CODE_CONTAINER: return '/^<(?:script|pre|textarea|style)(?:\s|>|$)/i'; case HtmlBlock::TYPE_2_COMMENT: return '/^/'; case HtmlBlock::TYPE_3: return '/\?>/'; case HtmlBlock::TYPE_4: return '/>/'; case HtmlBlock::TYPE_5_CDATA: return '/\]\]>/'; default: throw new InvalidArgumentException('Invalid HTML block type'); } } /** * @psalm-pure */ public static function isLinkPotentiallyUnsafe(string $url): bool { return \preg_match(self::REGEX_UNSAFE_PROTOCOL, $url) !== 0 && \preg_match(self::REGEX_SAFE_DATA_PROTOCOL, $url) === 0; } }

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?

Can I track my payment status?

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