vendor/symfony/http-foundation/AcceptHeader.php

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<?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;

// Help opcache.preload discover always-needed symbols
class_exists(AcceptHeaderItem::class);

/**
 * Represents an Accept-* header.
 *
 * An accept header is compound with a list of items,
 * sorted by descending quality.
 *
 * @author Jean-François Simon <contact@jfsimon.fr>
 */
class AcceptHeader
{
    /**
     * @var AcceptHeaderItem[]
     */
    private $items = [];

    /**
     * @var bool
     */
    private $sorted = true;

    /**
     * @param AcceptHeaderItem[] $items
     */
    public function __construct(array $items)
    {
        foreach ($items as $item) {
            $this->add($item);
        }
    }

    /**
     * Builds an AcceptHeader instance from a string.
     *
     * @return self
     */
    public static function fromString(?string $headerValue)
    {
        $index = 0;

        $parts = HeaderUtils::split($headerValue ?? '', ',;=');

        return new self(array_map(function ($subParts) use (&$index) {
            $part = array_shift($subParts);
            $attributes = HeaderUtils::combine($subParts);