parse $http_response_header

$http_response_header_parser.php

<?php
/**
 * Parse a set of HTTP headers
 *
 * @param array The php headers to be parsed
 * @param [string] The name of the header to be retrieved
 * @return A header value if a header is passed;
 *         An array with all the headers otherwise
 */
function parseHeaders(array $headers, $header = null) {
    $output = array();
    if ('HTTP' === substr($headers[0], 0, 4)) {
        list(, $output['status'], $output['status_text']) = explode(' ', $headers[0]);
        unset($headers[0]);
    }
    foreach ($headers as $v) {
        $h                         = preg_split('/:\s*/', $v);
        $output[strtolower($h[0])] = $h[1];
    }
    if (null !== $header) {
        if (isset($output[strtolower($header)])) {
            return $output[strtolower($header)];
        }
        return;
    }
    return $output;
}

Discription.txt

$http_response_header is a Array like

Array
(
    [0] => HTTP/1.1 200 OK
    [1] => Date: Thu, 14 Oct 2010 09:46:18 GMT
    [2] => Server: Apache/2.2
    [3] => Last-Modified: Sat, 07 Feb 2009 16:31:04 GMT
    [4] => ETag: "340011c-3614-46256a9e66200"
    [5] => Accept-Ranges: bytes
    [6] => Content-Length: 13844
    [7] => Vary: User-Agent
    [8] => Expires: Thu, 15 Apr 2020 20:00:00 GMT
    [9] => Connection: close
    [10] => Content-Type: image/png
)

which is useful when you what to know the situation being after using the file_get_contents(), but it's not that easy to get the status code or status text since it's a wrap of HTTP headers, so here's a parser(from internet) to make it more easy to get specific header.