Source of file HeaderParse.php

<?php

namespace AdobeConnectClient\Helpers;

/**

 * Parses a Header

 *

 * See {@link https://github.com/guzzle/psr7}

 */

abstract class HeaderParse

{

    /**

     * Parse an array of header values containing ";" separated data into an

     * array of associative arrays representing the header key value pair

     * data of the header. When a parameter does not contain a value, but just

     * contains a key, this function will inject a key with a '' string value.

     *

     * @param string|array $header Header to parse into components.

     * @return array Returns the parsed header values.

     */

    public static function parse($header)

    {

        static $trimmed = "\"'  \n\t\r";

        $params = $matches = [];

        foreach (static::normalize($header) as $val) {

            $part = [];

            foreach (preg_split('/;(?=([^"]*"[^"]*")*[^"]*$)/', $val) as $kvp) {

                if (preg_match_all('/<[^>]+>|[^=]+/', $kvp, $matches)) {

                    $m = $matches[0];

                    if (isset($m[1])) {

                        $part[trim($m[0], $trimmed)] = trim($m[1], $trimmed);

                    } else {

                        $part[] = trim($m[0], $trimmed);

                    }

                }

            }

            if ($part) {

                $params[] = $part;

            }

        }

        return $params;

    }

    /**

     * Converts an array of header values that may contain comma separated

     * headers into an array of headers with no comma separated values.

     *

     * @param string|array $header Header to normalize.

     * @return array Returns the normalized header field values.

     */

    private static function normalize($header)

    {

        if (!is_array($header)) {

            return array_map('trim', explode(',', $header));

        }

        $result = [];

        foreach ($header as $value) {

            foreach ((array) $value as $v) {

                if (mb_strpos($v, ',') === false) {

                    $result[] = $v;

                    continue;

                }

                foreach (preg_split('/,(?=([^"]*"[^"]*")*[^"]*$)/', $v) as $vv) {

                    $result[] = trim($vv);

                }

            }

        }

        return $result;

    }

}