<?php

namespace PSX\Http\Environment;

/**
 * HTTP context which provides all needed parameters outside of the request
 * body. This can be used as facade if you dont want to pass the raw HTTP
 * request object to user-land functions
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
interface HttpContextInterface
{
    /**
     * Returns the HTTP request method i.e. GET
     *
     * @return string
     */
    public function getMethod();

    /**
     * Returns a specific header
     *
     * @param string $name
     * @return string|null
     */
    public function getHeader($name);

    /**
     * Returns all available headers
     *
     * @return array
     */
    public function getHeaders();

    /**
     * Returns a specific fragment from the uri
     *
     * @param string $name
     * @return string
     */
    public function getUriFragment($name);

    /**
     * Returns all available uri fragments
     *
     * @return array
     */
    public function getUriFragments();

    /**
     * Returns a query parameter from the uri. Those are parsed by the parse_str
     * function so the value is either a string or an array in case the
     * parameter uses a "[]" notation
     *
     * @param string $name
     * @return string|array
     */
    public function getParameter($name);

    /**
     * Returns all available query parameters
     *
     * @return array
     */
    public function getParameters();
}
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