272 lines
9 KiB
PHP
Executable file
272 lines
9 KiB
PHP
Executable file
<?php
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/**
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* League.Uri (https://uri.thephpleague.com)
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*
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* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace League\Uri;
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use League\Uri\Exceptions\SyntaxError;
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use League\Uri\KeyValuePair\Converter;
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use Stringable;
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use function array_key_exists;
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use function array_keys;
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use function is_array;
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use function rawurldecode;
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use function strpos;
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use function substr;
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use const PHP_QUERY_RFC3986;
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/**
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* A class to parse the URI query string.
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*
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* @see https://tools.ietf.org/html/rfc3986#section-3.4
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*/
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final class QueryString
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{
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private const PAIR_VALUE_DECODED = 1;
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private const PAIR_VALUE_PRESERVED = 2;
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/**
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* @codeCoverageIgnore
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*/
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private function __construct()
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{
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}
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/**
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* Build a query string from a list of pairs.
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*
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* @see QueryString::buildFromPairs()
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* @see https://datatracker.ietf.org/doc/html/rfc3986#section-2.2
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*
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* @param iterable<array{0:string, 1:string|float|int|bool|null}> $pairs
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* @param non-empty-string $separator
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*
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* @throws SyntaxError If the encoding type is invalid
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* @throws SyntaxError If a pair is invalid
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*/
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public static function build(iterable $pairs, string $separator = '&', int $encType = PHP_QUERY_RFC3986): ?string
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{
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return self::buildFromPairs($pairs, Converter::fromEncodingType($encType)->withSeparator($separator));
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}
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/**
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* Build a query string from a list of pairs.
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*
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* The method expects the return value from Query::parse to build
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* a valid query string. This method differs from PHP http_build_query as
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* it does not modify parameters keys.
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*
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* If a reserved character is found in a URI component and
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* no delimiting role is known for that character, then it must be
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* interpreted as representing the data octet corresponding to that
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* character's encoding in US-ASCII.
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*
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* @see https://datatracker.ietf.org/doc/html/rfc3986#section-2.2
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*
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* @param iterable<array{0:string, 1:string|float|int|bool|null}> $pairs
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*
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* @throws SyntaxError If the encoding type is invalid
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* @throws SyntaxError If a pair is invalid
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*/
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public static function buildFromPairs(iterable $pairs, ?Converter $converter = null): ?string
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{
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$keyValuePairs = [];
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foreach ($pairs as $pair) {
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if (!is_array($pair) || [0, 1] !== array_keys($pair)) {
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throw new SyntaxError('A pair must be a sequential array starting at `0` and containing two elements.');
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}
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$keyValuePairs[] = [(string) Encoder::encodeQueryKeyValue($pair[0]), match(null) {
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$pair[1] => null,
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default => Encoder::encodeQueryKeyValue($pair[1]),
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}];
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}
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return ($converter ?? Converter::fromRFC3986())->toValue($keyValuePairs);
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}
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/**
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* Parses the query string like parse_str without mangling the results.
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*
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* @see QueryString::extractFromValue()
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* @see http://php.net/parse_str
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* @see https://wiki.php.net/rfc/on_demand_name_mangling
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*
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* @param non-empty-string $separator
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*
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* @throws SyntaxError
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*/
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public static function extract(Stringable|string|bool|null $query, string $separator = '&', int $encType = PHP_QUERY_RFC3986): array
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{
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return self::extractFromValue($query, Converter::fromEncodingType($encType)->withSeparator($separator));
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}
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/**
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* Parses the query string like parse_str without mangling the results.
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*
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* The result is similar as PHP parse_str when used with its
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* second argument with the difference that variable names are
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* not mangled.
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*
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* @see http://php.net/parse_str
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* @see https://wiki.php.net/rfc/on_demand_name_mangling
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*
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* @throws SyntaxError
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*/
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public static function extractFromValue(Stringable|string|bool|null $query, ?Converter $converter = null): array
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{
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return self::convert(self::decodePairs(
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($converter ?? Converter::fromRFC3986())->toPairs($query),
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self::PAIR_VALUE_PRESERVED
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));
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}
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/**
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* Parses a query string into a collection of key/value pairs.
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*
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* @param non-empty-string $separator
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*
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* @throws SyntaxError
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*
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* @return array<int, array{0:string, 1:string|null}>
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*/
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public static function parse(Stringable|string|bool|null $query, string $separator = '&', int $encType = PHP_QUERY_RFC3986): array
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{
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return self::parseFromValue($query, Converter::fromEncodingType($encType)->withSeparator($separator));
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}
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/**
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* Parses a query string into a collection of key/value pairs.
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*
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* @throws SyntaxError
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*
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* @return array<int, array{0:string, 1:string|null}>
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*/
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public static function parseFromValue(Stringable|string|bool|null $query, ?Converter $converter = null): array
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{
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return self::decodePairs(
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($converter ?? Converter::fromRFC3986())->toPairs($query),
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self::PAIR_VALUE_DECODED
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);
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}
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/**
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* @param array<non-empty-list<string|null>> $pairs
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*
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* @return array<int, array{0:string, 1:string|null}>
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*/
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private static function decodePairs(array $pairs, int $pairValueState): array
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{
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$decodePair = static function (array $pair, int $pairValueState): array {
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[$key, $value] = $pair;
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return match ($pairValueState) {
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self::PAIR_VALUE_PRESERVED => [(string) Encoder::decodeAll($key), $value],
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default => [(string) Encoder::decodeAll($key), Encoder::decodeAll($value)],
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};
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};
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return array_reduce(
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$pairs,
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fn (array $carry, array $pair) => [...$carry, $decodePair($pair, $pairValueState)],
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[]
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);
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}
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/**
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* Converts a collection of key/value pairs and returns
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* the store PHP variables as elements of an array.
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*/
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public static function convert(iterable $pairs): array
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{
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$returnedValue = [];
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foreach ($pairs as $pair) {
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$returnedValue = self::extractPhpVariable($returnedValue, $pair);
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}
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return $returnedValue;
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}
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/**
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* Parses a query pair like parse_str without mangling the results array keys.
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*
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* <ul>
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* <li>empty name are not saved</li>
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* <li>If the value from name is duplicated its corresponding value will be overwritten</li>
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* <li>if no "[" is detected the value is added to the return array with the name as index</li>
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* <li>if no "]" is detected after detecting a "[" the value is added to the return array with the name as index</li>
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* <li>if there's a mismatch in bracket usage the remaining part is dropped</li>
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* <li>“.” and “ ” are not converted to “_”</li>
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* <li>If there is no “]”, then the first “[” is not converted to becomes an “_”</li>
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* <li>no whitespace trimming is done on the key value</li>
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* </ul>
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*
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* @see https://php.net/parse_str
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* @see https://wiki.php.net/rfc/on_demand_name_mangling
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* @see https://github.com/php/php-src/blob/master/ext/standard/tests/strings/parse_str_basic1.phpt
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* @see https://github.com/php/php-src/blob/master/ext/standard/tests/strings/parse_str_basic2.phpt
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* @see https://github.com/php/php-src/blob/master/ext/standard/tests/strings/parse_str_basic3.phpt
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* @see https://github.com/php/php-src/blob/master/ext/standard/tests/strings/parse_str_basic4.phpt
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*
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* @param array $data the submitted array
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* @param array|string $name the pair key
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* @param string $value the pair value
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*/
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private static function extractPhpVariable(array $data, array|string $name, string $value = ''): array
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{
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if (is_array($name)) {
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[$name, $value] = $name;
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$value = rawurldecode((string) $value);
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}
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if ('' === $name) {
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return $data;
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}
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$leftBracketPosition = strpos($name, '[');
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if (false === $leftBracketPosition) {
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$data[$name] = $value;
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return $data;
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}
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$rightBracketPosition = strpos($name, ']', $leftBracketPosition);
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if (false === $rightBracketPosition) {
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$data[$name] = $value;
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return $data;
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}
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$key = substr($name, 0, $leftBracketPosition);
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if (!array_key_exists($key, $data) || !is_array($data[$key])) {
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$data[$key] = [];
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}
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$index = substr($name, $leftBracketPosition + 1, $rightBracketPosition - $leftBracketPosition - 1);
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if ('' === $index) {
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$data[$key][] = $value;
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return $data;
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}
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$remaining = substr($name, $rightBracketPosition + 1);
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if (!str_starts_with($remaining, '[') || false === strpos($remaining, ']', 1)) {
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$remaining = '';
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}
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$data[$key] = self::extractPhpVariable($data[$key], $index.$remaining, $value);
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return $data;
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}
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}
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