Google texter - v0.2

/*
** Google texter - v0.2
** This experimental script creates a random text by
** using google search as source. 
**
** Warning: Do not execute this script on a webserver!
** This script was made to execute from a command line.
**
** (c) Jonas John, <www.jonasjohn.de>
** License: BSD (http://en.wikipedia.org/wiki/BSD_licenses)
*/
 
// 
// Configuration: 
// 
 
// start words to search for:
$words = 'php is';
 
// stop the script after X words
$text_length = 100;
 
// search for X words on google
$search_length = 3;
 
// search in the first X google results for new words
$google_pages = 50;
 
// use this google server
$google_server = 'www.google.com';
 
 
// start the search progress
google_texter($words, $text_length, $search_length);
 
 
 
function get_url($url){
 
    // create a new curl resource
    $ch = curl_init();
 
    // set URL to download
    curl_setopt($ch, CURLOPT_URL, $url);
 
    // user agent:
    $browser = "Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.0.4)";
    curl_setopt($ch, CURLOPT_USERAGENT, $browser);
 
    // remove header? 0 = yes, 1 = no
    curl_setopt($ch, CURLOPT_HEADER, 0);
 
    // should curl return or print the data? true = return, false = print
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 
    // timeout in seconds
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
 
    // download the given URL, and return output
    $output = curl_exec($ch);
 
    // close the curl resource, and free system resources
    curl_close($ch);
 
    // print output
    return $output;
}
 
function get_word($words, $search_length){
    global $google_pages;
    global $google_server;
 
    // split words into an array
    $words = explode(" ", $words);    
 
    $_words = array_slice($words, ($search_length * -1));
 
    $words = implode(' ', $_words);
    $words = strtolower($words);
 
 
    $url = 'http://'.$google_server.'/';
    $url .= 'search?num='.$google_pages.'&';
    $url .= 'q=%22'.urlencode($words).'%22&';
    $url .= 'btnG=Search';
 
    $content = get_url($url);
 
    $content = strip_tags($content);
    $content = strtolower($content);
    $content = str_replace("\r\n", " ", $content);
    $content = str_replace("\r", " ", $content);
    $content = str_replace("\n", " ", $content);
    $content = str_replace("\t", " ", $content);
    $content = str_replace("<", " ", $content);
    $content = str_replace(">", " ", $content);
    $content = str_replace('"', " ", $content);
    $content = str_replace("'", " ", $content);
    $content = str_replace("-", " ", $content);
    $content = str_replace(".", " ", $content);
 
    preg_match_all('/'.$words.' ([0-9a-zA-ZäöüÄÖÜ\?!]+)/', $content, $m);
 
    $next_word = isset($m[1]) ? $m[1] : array();
 
    $next_word = array_count_values($next_word);
 
    arsort($next_word);
 
    $next_word = array_keys($next_word);
 
    $r = rand(0,1);
 
    if (isset($next_word[$r])){
        return $next_word[$r];
    }
 
    if (isset($next_word[0])){
        return $next_word[0];
    }    
    return '';
}
 
function google_texter($start_words, $text_length, $search_length){
 
    $word = $start_words;
    print $word;
 
    for ($x=0; $x < $text_length; $x++){
        $w = get_word($word, $search_length);
        $word .= ' ' . $w;
        print ' ' . $w;
    }
 
}