PHP: Check the existance of an ressource/file/url on a host (Linkchecker)

gistfile1.aw

/**
 * Checks the existance of an ressource/file/url on a host (Linkchecker).
 *
 * Usage:
 * <code>
 * $url = 'http://www.google.de/?q=foobar';
 * $opt = array('timeout' => 3);
 * $result = mp_urlCheck($url, $opt);
 * if ($result == false) {
 *     echo 'ERROR: Errornumber: ' . $opt['errno'] . ', Errormessage: ' . $opt['errstr'];
 * } else {
 *     echo 'SUCCESS';
 * }
 * </code>
 *
 * @param  string  $url      The URL to check
 * @param  array   $options  Additional options as follows:
 *                           - $options['port']     int  The port which will be used for the connection, default is 80
 *                           - $options['timeout']  int  Timeout in seconds for the connection, default is 30
 */
function mp_urlCheck($url, array &$options=array())
{
    $comp = @parse_url($url);
    if (!isset($comp['host'])) {
        return false;
    }

    // variable to store result
    $status = false;

    // some variables
    $host    = $comp['host'];
    $port    = (isset($options['port']) && (int) $options['port'] > 0) ? $options['port'] : 80;
    $timeout = (isset($options['timeout']) && (int) $options['timeout'] > 0) ? $options['timeout'] : 30;

    $pathAndQuery = ($comp['path']) ? $comp['path'] : '/';
    if ($comp['query']) {
        $pathAndQuery = $pathAndQuery . '?' . $comp['query'];
    }

    if ($conn = fsockopen($host, $port, $errno, $errstr, $timeout)) {
        fwrite($conn, 'HEAD ' . $pathAndQuery . " HTTP/1.0\r\nHost: $host\r\n\r\n");
        $response = fgets($conn, 22);
        $status = (stripos($response, '200 OK') !== false);
        fclose($conn);
    }

    $options['errno']  = $errno;
    $options['errstr'] = $errstr;

    return $status;
}