<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation;
/**
* HTTP header utility functions.
*
* @author Christian Schmidt <github@chsc.dk>
*/
class HeaderUtils
{
public const DISPOSITION_ATTACHMENT = 'attachment';
public const DISPOSITION_INLINE = 'inline';
/**
* This class should not be instantiated.
*/
private function __construct()
{
}
/**
* Splits an HTTP header by one or more separators.
*
* Example:
*
* HeaderUtils::split("da, en-gb;q=0.8", ",;")
* // => ['da'], ['en-gb', 'q=0.8']]
*
* @param string $separators List of characters to split on, ordered by
* precedence, e.g. ",", ";=", or ",;="
*
* @return array Nested array with as many levels as there are characters in
* $separators
*/
public static function split(string $header, string $separators): array
{
$quotedSeparators = preg_quote($separators, '/');
preg_match_all('
/
(?!\s)
(?:
# quoted-string
"(?:[^"\\\\]|\\\\.)*(?:"|\\\\|$)
|
# token
[^"'.$quotedSeparators.']+
)+
(?<!\s)
|
# separator
\s*
(?<separator>['.$quotedSeparators.'])
\s*
/x', trim($header), $matches, \PREG_SET_ORDER);
return self::groupParts($matches, $separators);
}
/**
* Combines an array of arrays into one associative array.
*
* Each of the nested arrays should have one or two elements. The first
* value will be used as the keys in the associative array, and the second
* will be used as the values, or true if the nested array only contains one
* element. Array keys are lowercased.
*
* Example:
*
* HeaderUtils::combine([["foo", "abc"], ["bar"]])
* // => ["foo" => "abc", "bar" => true]
*/
public static function combine(array $parts): array
{
$assoc = [];
foreach ($parts as $part) {
$name = strtolower($part[0]);
$value = $part[1] ?? true;
$assoc[$name] = $value;
}
return $assoc;
}
/**
* Joins an associative array into a string for use in an HTTP header.
*
* The key and value of each entry are joined with "=", and all entries
* are joined with the specified separator and an additional space (for
* readability). Values are quoted if necessary.
*
* Example:
*
* HeaderUtils::toString(["foo" => "abc", "bar" => true, "baz" => "a b c"], ",")
* // => 'foo=abc, bar, baz="a b c"'
*/
public static function toString(array $assoc, string $separator): string
{
$parts = [];
foreach ($assoc as $name => $value) {
if (true === $value) {
$parts[] = $name;
} else {
$parts[] = $name.'='.self::quote($value);
}
}
return implode($separator.' ', $parts);
}
/**
* Encodes a string as a quoted string, if necessary.
*
* If a string contains characters not allowed by the "token" construct in
* the HTTP specification, it is backslash-escaped and enclosed in quotes
* to match the "quoted-string" construct.
*/
public static function quote(string $s): string
{
if (preg_match('/^[a-z0-9!#$%&\'*.^_`|~-]+$/i', $s)) {
return $s;
}
return '"'.addcslashes($s, '"\\"').'"';
}
/**
* Decodes a quoted string.
*
* If passed an unquoted string that matches the "token" construct (as
* defined in the HTTP specification), it is passed through verbatimly.
*/
public static function unquote(string $s): string
{
return preg_replace('/\\\\(.)|"/', '$1', $s);
}
/**
* Generates an HTTP Content-Disposition field-value.
*
* @param string $disposition One of "inline" or "attachment"
* @param string $filename A unicode string
* @param string $filenameFallback A string containing only ASCII characters that
* is semantically equivalent to $filename. If the filename is already ASCII,
* it can be omitted, or just copied from $filename
*
* @throws \InvalidArgumentException
*
* @see RFC 6266
*/
public static function makeDisposition(string $disposition, string $filename, string $filenameFallback = ''): string
{
if (!\in_array($disposition, [self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE])) {
throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
}
if ('' === $filenameFallback) {
$filenameFallback = $filename;
}
// filenameFallback is not ASCII.
if (!preg_match('/^[\x20-\x7e]*$/', $filenameFallback)) {
throw new \InvalidArgumentException('The filename fallback must only contain ASCII characters.');
}
// percent characters aren't safe in fallback.
if (str_contains($filenameFallback, '%')) {
throw new \InvalidArgumentException('The filename fallback cannot contain the "%" character.');
}
// path separators aren't allowed in either.
if (str_contains($filename, '/') || str_contains($filename, '\\') || str_contains($filenameFallback, '/') || str_contains($filenameFallback, '\\')) {
throw new \InvalidArgumentException('The filename and the fallback cannot contain the "/" and "\\" characters.');
}
$params = ['filename' => $filenameFallback];
if ($filename !== $filenameFallback) {
$params['filename*'] = "utf-8''".rawurlencode($filename);
}
return $disposition.'; '.self::toString($params, ';');
}
/**
* Like parse_str(), but preserves dots in variable names.
*/
public static function parseQuery(string $query, bool $ignoreBrackets = false, string $separator = '&'): array
{
$q = [];
foreach (explode($separator, $query) as $v) {
if (false !== $i = strpos($v, "\0")) {
$v = substr($v, 0, $i);
}
if (false === $i = strpos($v, '=')) {
$k = urldecode($v);
$v = '';
} else {
$k = urldecode(substr($v, 0, $i));
$v = substr($v, $i);
}
if (false !== $i = strpos($k, "\0")) {
$k = substr($k, 0, $i);
}
$k = ltrim($k, ' ');
if ($ignoreBrackets) {
$q[$k][] = urldecode(substr($v, 1));
continue;
}
if (false === $i = strpos($k, '[')) {
$q[] = bin2hex($k).$v;
} else {
$q[] = bin2hex(substr($k, 0, $i)).rawurlencode(substr($k, $i)).$v;
}
}
if ($ignoreBrackets) {
return $q;
}
parse_str(implode('&', $q), $q);
$query = [];
foreach ($q as $k => $v) {
if (false !== $i = strpos($k, '_')) {
$query[substr_replace($k, hex2bin(substr($k, 0, $i)).'[', 0, 1 + $i)] = $v;
} else {
$query[hex2bin($k)] = $v;
}
}
return $query;
}
private static function groupParts(array $matches, string $separators, bool $first = true): array
{
$separator = $separators[0];
$partSeparators = substr($separators, 1);
$i = 0;
$partMatches = [];
$previousMatchWasSeparator = false;
foreach ($matches as $match) {
if (!$first && $previousMatchWasSeparator && isset($match['separator']) && $match['separator'] === $separator) {
$previousMatchWasSeparator = true;
$partMatches[$i][] = $match;
} elseif (isset($match['separator']) && $match['separator'] === $separator) {
$previousMatchWasSeparator = true;
++$i;
} else {
$previousMatchWasSeparator = false;
$partMatches[$i][] = $match;
}
}
$parts = [];
if ($partSeparators) {
foreach ($partMatches as $matches) {
$parts[] = self::groupParts($matches, $partSeparators, false);
}
} else {
foreach ($partMatches as $matches) {
$parts[] = self::unquote($matches[0][0]);
}
if (!$first && 2 < \count($parts)) {
$parts = [
$parts[0],
implode($separator, \array_slice($parts, 1)),
];
}
}
return $parts;
}
}
At NFC Pay, we strive to provide a seamless and satisfactory experience with our services. This Refund Policy outlines the circumstances under which refunds may be issued for transactions made through our platform. Please read this policy carefully to understand your rights regarding refunds.
1. Eligibility for Refunds
Refunds may be considered under the following circumstances:
2. Non-Refundable Situations
Refunds will generally not be issued in the following situations:
3. Refund Process
To request a refund, please follow these steps:
4. Refund Exceptions
Certain transactions may be subject to specific terms and conditions, including non-refundable fees or charges. Please review the terms associated with each transaction carefully, as some fees may not be eligible for refunds.
5. Modifications to the Refund Policy
NFC Pay reserves the right to modify this Refund Policy at any time. Changes will be communicated through updates on our website and app, and the effective date will be updated accordingly. We encourage you to review this policy periodically to stay informed about our refund practices.
By using NFC Pay, you agree to this Refund Policy and understand the terms under which refunds may be issued. Our goal is to ensure a fair and transparent refund process, providing you with confidence and peace of mind when using our services.