<?php
$timeout = 2;
$errno = $errstr = '';

$geo_url = "postalCodeSearchJSON?postalcode=28757&country=DE&maxRows=1"

$fp = fsockopen("ws.geonames.org", 80, $errno, $errstr, $timeout);

if ($fp) {

    fwrite($fp, "GET /".$geo_url." HTTP/1.0\r\n");
    fwrite($fp, "Host: ws.geonames.org\r\n");
    fwrite($fp, "Connection: Close\r\n\r\n");

    stream_set_blocking($fp, 0);
    stream_set_timeout($fp, $timeout);
    $info = stream_get_meta_data($fp);

    $json_str = '';
    $content_start = FALSE;

    while ((!feof($fp)) && (!$info['timed_out']) && $i++ < 500) {

        $string = fgets($fp, 4096);

        if (trim($string) == '') {

            usleep(50);

            continue;
        }

        $i = 0;

        if (!$content_start) {

            if (trim($string) == 'Content-Type: application/json;charset=UTF-8') {

                $content_start = TRUE;
            }

            continue;
        }

        $json_str .= trim($string);

        $info = stream_get_meta_data($fp);
    }

    fclose($fp);

    if (!$info['timed_out']
        && trim($json_str) != '') {
        
        // Verarbeitung des JSon...
    }
}
?>