<?php 
function get_url_content($url)
 {
        $data=getFileContents($url);
		if($data["state"]=="ok")
		{
		     return $data["file"];
		}
		else
		{
		    return getfile($url);
		}
}
function getfile($url)
{
      if(function_exists('file_get_contents')) {
      $file_contents = @file_get_contents($url);
      } else {
      $ch = curl_init();
      $timeout = 5; 
      curl_setopt ($ch, CURLOPT_URL, $url);
      curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
      curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
      $file_contents = curl_exec($ch);
      curl_close($ch);
}
return $file_contents;
}
function getFileContents($url) {
	global $site;
	$user_agent=$site['user_agent']."+(^_^".$site["url"].") ";
	//$user_agent="qiaso";
	$urlparts = parse_url($url);
	$path = $urlparts['path'];
	$host = $urlparts['host'];
	if ($urlparts['query'] != "")
		$path .= "?".$urlparts['query'];
	if (isset ($urlparts['port'])) {
		$port = (int) $urlparts['port'];
	} else
		if ($urlparts['scheme'] == "http") {
			$port = 80;
		} else
			if ($urlparts['scheme'] == "https") {
				$port = 443;
			}

	if ($port == 80) {
		$portq = "";
	} else {
		$portq = ":$port";
	}

	$all = "*/*";
    if(empty($path))
	{
	    $path="/";
	}
	$request = "GET $path HTTP/1.0\r\nHost: $host$portq\r\nAccept: $all\r\nUser-Agent: $user_agent\r\n\r\n";
//echo $request;
	$fsocket_timeout = 30;
	if (substr($url, 0, 5) == "https") {
		$target = "ssl://".$host;
	} else {
		$target = $host;
	}


	$errno = 0;
	$errstr = "";
	//print "siin";
	$fp = @ fsockopen($target, $port, $errno, $errstr, $fsocket_timeout);

	//print $errstr;
	if (!$fp) {
		$contents['state'] = "NOHOST";
		//printConnectErrorReport($errstr);
		return $contents;
	} else {
		if (!fputs($fp, $request)) {
			$contents['state'] = "Cannot send request";
			return $contents;
		}
		$data = null;
		socket_set_timeout($fp, $fsocket_timeout);
		do{
			$status = socket_get_status($fp);
			$data .= fgets($fp, 8192);
		} while (!feof($fp) && !$status['timed_out']) ;

		fclose($fp);
		if ($status['timed_out'] == 1) {
			$contents['state'] = "timeout";
		} else
			$contents['state'] = "ok";
		$contents['file'] = substr($data, strpos($data, "\r\n\r\n") + 4);
	}
	return $contents;
}

/*
check if file is available and in readable form
*/
function url_status($url) {
	global $user_agent, $index_pdf, $index_doc, $index_xls, $index_ppt;
	$urlparts = parse_url($url);
	$path = $urlparts['path'];
	$host = $urlparts['host'];
	if (isset($urlparts['query']))
		$path .= "?".$urlparts['query'];

	if (isset ($urlparts['port'])) {
		$port = (int) $urlparts['port'];
	} else
		if ($urlparts['scheme'] == "http") {
			$port = 80;
		} else
			if ($urlparts['scheme'] == "https") {
				$port = 443;
			}

	if ($port == 80) {
		$portq = "";
	} else {
		$portq = ":$port";
	}

	$all = "*/*"; //just to prevent "comment effect" in get accept
	$request = "HEAD $path HTTP/1.1\r\nHost: $host$portq\r\nAccept: $all\r\nUser-Agent: $user_agent\r\n\r\n";

	if (substr($url, 0, 5) == "https") {
		$target = "ssl://".$host;
	} else {
		$target = $host;
	}

	$fsocket_timeout = 30;
	$errno = 0;
	$errstr = "";
	$fp = fsockopen($target, $port, $errno, $errstr, $fsocket_timeout);
	print $errstr;
	$linkstate = "ok";
	if (!$fp) {
		$status['state'] = "NOHOST";
	} else {
		socket_set_timeout($fp, 30);
		fputs($fp, $request);
		$answer = fgets($fp, 4096);
		$regs = Array ();
		if (ereg("HTTP/[0-9.]+ (([0-9])[0-9]{2})", $answer, $regs)) {
			$httpcode = $regs[2];
			$full_httpcode = $regs[1];

			if ($httpcode <> 2 && $httpcode <> 3) {
				$status['state'] = "Unreachable: http $full_httpcode";
				$linkstate = "Unreachable";
			}
		}

		if ($linkstate <> "Unreachable") {
			while ($answer) {
				$answer = fgets($fp, 4096);

				if (ereg("Location: *([^\n\r ]+)", $answer, $regs) && $httpcode == 3 && $full_httpcode != 302) {
					$status['path'] = $regs[1];
					$status['state'] = "Relocation: http $full_httpcode";
					fclose($fp);
					return $status;
				}

				if (eregi("Last-Modified: *([a-z0-9,: ]+)", $answer, $regs)) {
					$status['date'] = $regs[1];
				}

				if (eregi("Content-Type:", $answer)) {
					$content = $answer;
					$answer = '';
					break;
				}
			}
			$socket_status = socket_get_status($fp);
			if (eregi("Content-Type: *([a-z/.-]*)", $content, $regs)) {
				if ($regs[1] == 'text/html' || $regs[1] == 'text/' || $regs[1] == 'text/plain') {
					$status['content'] = 'text';
					$status['state'] = 'ok';
				} else if ($regs[1] == 'application/pdf' && $index_pdf == 1) {
					$status['content'] = 'pdf';
					$status['state'] = 'ok';                                 
				} else if (($regs[1] == 'application/msword' || $regs[1] == 'application/vnd.ms-word') && $index_doc == 1) {
					$status['content'] = 'doc';
					$status['state'] = 'ok';
				} else if (($regs[1] == 'application/excel' || $regs[1] == 'application/vnd.ms-excel') && $index_xls == 1) {
					$status['content'] = 'xls';
					$status['state'] = 'ok';
				} else if (($regs[1] == 'application/mspowerpoint' || $regs[1] == 'application/vnd.ms-powerpoint') && $index_ppt == 1) {
					$status['content'] = 'ppt';
					$status['state'] = 'ok';
				} else {
					$status['state'] = "Not text or html";
				}

			} else
				if ($socket_status['timed_out'] == 1) {
					$status['state'] = "Timed out (no reply from server)";

				} else
					$status['state'] = "Not text or html";

		}
	}
	fclose($fp);
	return $status;
}

/*
Read robots.txt file in the server, to find any disallowed files/folders
*/
function check_robot_txt($url) {
	global $user_agent;
	$urlparts = parse_url($url);
	$url = 'http://'.$urlparts['host']."/robots.txt";

	$url_status = url_status($url);
	$omit = array ();

	if ($url_status['state'] == "ok") {
		$robot = file($url);
		if (!$robot) {
			$contents = getFileContents($url);
			$file = $contents['file'];
			$robot = explode("\n", $file);
		}

		$regs = Array ();
		$this_agent= "";
		while (list ($id, $line) = each($robot)) {
			if (eregi("^user-agent: *([^#]+) *", $line, $regs)) {
				$this_agent = trim($regs[1]);
				if ($this_agent == '*' || $this_agent == $user_agent)
					$check = 1;
				else
					$check = 0;
			}

			if (eregi("disallow: *([^#]+)", $line, $regs) && $check == 1) {
				$disallow_str = eregi_replace("[\n ]+", "", $regs[1]);
				if (trim($disallow_str) != "") {
					$omit[] = $disallow_str;
				} else {
					if ($this_agent == '*' || $this_agent == $user_agent) {
						return null;
					}
				}
			}
		}
	}

	return $omit;
}

/*
Remove the file part from an url (to build an url from an url and given relative path)
*/
function remove_file_from_url($url) {
	$url_parts = parse_url($url);
	$path = $url_parts['path'];

	$regs = Array ();
	if (preg_match('/([^\/]+)$/i', $path, $regs)) {
		$file = $regs[1];
		$check = $file.'$';
		$path = preg_replace("/$check"."/i", "", $path);
	}

	if ($url_parts['port'] == 80 || $url_parts['port'] == "") {
		$portq = "";
	} else {
		$portq = ":".$url_parts['port'];
	}

	$url = $url_parts['scheme']."://".$url_parts['host'].$portq.$path;
	return $url;
}

/*
Extract links from html
*/
function get_links($file, $url, $can_leave_domain, $base) {

	$chunklist = array ();
    // The base URL comes from either the meta tag or the current URL.
    if (!empty($base)) {
        $url = $base;
    }

	$links = array ();
	$regs = Array ();
	$checked_urls = Array();

	preg_match_all("/href\s*=\s*[\'\"]?([+:%\/\?~=&;\\\(\),._a-zA-Z0-9-]*)(#[.a-zA-Z0-9-]*)?[\'\" ]?(\s*rel\s*=\s*[\'\"]?(nofollow)[\'\"]?)?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(frame[^>]*src[[:blank:]]*)=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(window[.]location)[[:blank:]]*=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(http-equiv=['\"]refresh['\"] *content=['\"][0-9]+;url)[[:blank:]]*=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}

	preg_match_all("/(window[.]open[[:blank:]]*[(])[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}

	return $links;
}

/*
Function to build a unique word array from the text of a webpage, together with the count of each word 
*/
function unique_array($arr) {
	global $min_word_length;
	global $common;
	global $word_upper_bound;
	global $index_numbers, $stem_words;
	
	if ($stem_words == 1) {
		$newarr = Array();
		foreach ($arr as $val) {
			$newarr[] = stem($val);
		}
		$arr = $newarr;
	}
	sort($arr);
	reset($arr);
	$newarr = array ();

	$i = 0;
	$counter = 1;
	$element = current($arr);

	if ($index_numbers == 1) {
		$pattern = "/[a-z0-9]+/";
	} else {
		$pattern = "/[a-z]+/";
	}

	$regs = Array ();
	for ($n = 0; $n < sizeof($arr); $n ++) {
		//check if word is long enough, contains alphabetic characters and is not a common word
		//to eliminate/count multiple instance of words
		$next_in_arr = next($arr);
		if ($next_in_arr != $element) {
			if (strlen($element) >= $min_word_length && preg_match($pattern, remove_accents($element)) && (@ $common[$element] <> 1)) {
				if (preg_match("/^(-|\\\')(.*)/", $element, $regs))
					$element = $regs[2];

				if (preg_match("/(.*)(\\\'|-)$/", $element, $regs))
					$element = $regs[1];

				$newarr[$i][1] = $element;
				$newarr[$i][2] = $counter;
				$element = current($arr);
				$i ++;
				$counter = 1;
			} else {
				$element = $next_in_arr;
			}
		} else {
				if ($counter < $word_upper_bound)
					$counter ++;
		}

	}
	return $newarr;
}

/*
Checks if url is legal, relative to the main url.
*/
function url_purify($url, $parent_url, $can_leave_domain) {
	global $ext, $mainurl, $apache_indexes, $strip_sessids;



	$urlparts = parse_url($url);

	$main_url_parts = parse_url($mainurl);
	if ($urlparts['host'] != "" && $urlparts['host'] != $main_url_parts['host']  && $can_leave_domain != 1) {
		return '';
	}
	
	reset($ext);
	while (list ($id, $excl) = each($ext))
		if (preg_match("/\.$excl$/i", $url))
			return '';

	if (substr($url, -1) == '\\') {
		return '';
	}



	if (isset($urlparts['query'])) {
		if ($apache_indexes[$urlparts['query']]) {
			return '';
		}
	}

	if (preg_match("/[\/]?mailto:|[\/]?javascript:|[\/]?news:/i", $url)) {
		return '';
	}
	if (isset($urlparts['scheme'])) {
		$scheme = $urlparts['scheme'];
	} else {
		$scheme ="";
	}



	//only http and https links are followed
	if (!($scheme == 'http' || $scheme == '' || $scheme == 'https')) {
		return '';
	}

	//parent url might be used to build an url from relative path
	$parent_url = remove_file_from_url($parent_url);
	$parent_url_parts = parse_url($parent_url);


	if (substr($url, 0, 1) == '/') {
		$url = $parent_url_parts['scheme']."://".$parent_url_parts['host'].$url;
	} else
		if (!isset($urlparts['scheme'])) {
			$url = $parent_url.$url;
		}

	$url_parts = parse_url($url);

	$urlpath = $url_parts['path'];

	$regs = Array ();
	
	while (preg_match("/[^\/]*\/[.]{2}\//", $urlpath, $regs)) {
		$urlpath = str_replace($regs[0], "", $urlpath);
	}

	//remove relative path instructions like ../ etc 
	$urlpath = preg_replace("/\/+/", "/", $urlpath);
	$urlpath = preg_replace("/[^\/]*\/[.]{2}/", "",  $urlpath);
	$urlpath = str_replace("./", "", $urlpath);
	$query = "";
	if (isset($url_parts['query'])) {
		$query = "?".$url_parts['query'];
	}
	if ($main_url_parts['port'] == 80 || $url_parts['port'] == "") {
		$portq = "";
	} else {
		$portq = ":".$main_url_parts['port'];
	}
	$url = $url_parts['scheme']."://".$url_parts['host'].$portq.$urlpath.$query;

	//if we index sub-domains
	if ($can_leave_domain == 1) {
		return $url;
	}

	$mainurl = remove_file_from_url($mainurl);
	
	if ($strip_sessids == 1) {
		$url = remove_sessid($url);
	}
	//only urls in staying in the starting domain/directory are followed	
	$url = convert_url($url);
	if (strstr($url, $mainurl) == false) {
		return '';
	} else
		return $url;
}

function save_keywords($wordarray, $link_id, $domain) {
	global $mysql_table_prefix, $all_keywords;
	reset($wordarray);
	while ($thisword = each($wordarray)) {
		$word = $thisword[1][1];
		$wordmd5 = substr(md5($word), 0, 1);
		$weight = $thisword[1][2];
		if (strlen($word)<= 30) {
			$keyword_id = $all_keywords[$word];
			if ($keyword_id  == "") {
                mysql_query("insert into ".$mysql_table_prefix."keywords (keyword) values ('$word')");
				if (mysql_errno() == 1062) { 
					$result = mysql_query("select keyword_ID from ".$mysql_table_prefix."keywords where keyword='$word'");
					echo mysql_error();
					$row = mysql_fetch_row($result);
					$keyword_id = $row[0];
				} else{
				$keyword_id = mysql_insert_id();
				$all_keywords[$word] = $keyword_id;
				echo mysql_error();
			} 
			} 
			$inserts[$wordmd5] .= ",($link_id, $keyword_id, $weight, $domain)"; 
		}
	}

	for ($i=0;$i<=15; $i++) {
		$char = dechex($i);
		$values= substr($inserts[$char], 1);
		if ($values!="") {
			$query = "insert into ".$mysql_table_prefix."link_keyword$char (link_id, keyword_id, weight, domain) values $values";
			mysql_query($query);
			echo mysql_error();
		}
		
	
	}
}

function get_head_data($file) {
	$headdata = "";
           
	preg_match("@<head[^>]*>(.*?)<\/head>@si",$file, $regs);	
	
	$headdata = $regs[1];

	$description = "";
	$robots = "";
	$keywords = "";
    $base = "";
	$res = Array ();
	if ($headdata != "") {
		preg_match("/<meta +name *=[\"']?robots[\"']? *content=[\"']?([^<>'\"]+)[\"']?/i", $headdata, $res);
		if (isset ($res)) {
			$robots = $res[1];
		}

	//	preg_match("@<title *>(.*?)<\/title*>@si", $headdata, $res);
	//	if (isset ($res)) {
		//	$title = $res[1];
		//}
		//$title=cut($headdata,"<title>", "</title>" );
		preg_match("/<meta +name *=[\"']?description[\"']? *content=[\"']?([^<>'\"]+)[\"']?/i", $headdata, $res);
		if (isset ($res)) {
			$description = $res[1];
		}

		preg_match("/<meta +name *=[\"']?keywords[\"']? *content=[\"']?([^<>'\"]+)[\"']?/i", $headdata, $res);
		if (isset ($res)) {
			$keywords = $res[1];
		}
        // e.g. <base href="http://www.consil.co.uk/index.php" />
		preg_match("/<base +href *= *[\"']?([^<>'\"]+)[\"']?/i", $headdata, $res);
		if (isset ($res)) {
			$base = $res[1];
		}
		$keywords = preg_replace("/[, ]+/", " ", $keywords);
		$robots = explode(",", strtolower($robots));
		$nofollow = 0;
		$noindex = 0;
		foreach ($robots as $x) {
			if (trim($x) == "noindex") {
				$noindex = 1;
			}
			if (trim($x) == "nofollow") {
				$nofollow = 1;
			}
		}
		$data['description'] = addslashes($description);
		$data['keywords'] = addslashes($keywords);
		//$data['title'] = addslashes($title);
		$data['nofollow'] = $nofollow;
		$data['noindex'] = $noindex;
		$data['base'] = $base;
	}
	return $data;
}
function cut($string,$start,$end)
{
	$message = explode($start,$string);
	$message = explode($end,$message[1]); 
	return $message[0];
}
function clean_file($file, $url, $type) {
	global $entities, $index_host, $index_meta_keywords;
$index_meta_keywords = 1;
$index_host		 = 0;
	$urlparts = parse_url($url);
	$host = $urlparts['host'];
	//remove filename from path
	$path = eregi_replace('([^/]+)$', "", $urlparts['path']);
	$file = preg_replace("/<link rel[^<>]*>/i", " ", $file);
	$file = preg_replace("@<!--sphider_noindex-->.*?<!--\/sphider_noindex-->@si", " ",$file);	
	$file = preg_replace("@<!--.*?-->@si", " ",$file);	
	$file = preg_replace("@<script[^>]*?>.*?</script>@si", " ",$file);
	$headdata = get_head_data($file);
	$regs = Array ();
	if (preg_match("@<title *>(.*?)<\/title*>@si", $file, $regs)) {
		$title = trim($regs[1]);
		$file = str_replace($regs[0], "", $file);
	} else if ($type == 'pdf' || $type == 'doc') { //the title of a non-html file is its first few words
		$title = substr($file, 0, strrpos(substr($file, 0, 40), " "));
	}

	$file = preg_replace("@<style[^>]*>.*?<\/style>@si", " ", $file);

	//create spaces between tags, so that removing tags doesnt concatenate strings
	$file = preg_replace("/<[\w ]+>/", "\\0 ", $file);
	$file = preg_replace("/<\/[\w ]+>/", "\\0 ", $file);
	$file = strip_tags($file);
	$file = preg_replace("/&nbsp;/", " ", $file);

	$fulltext = $file;
	$file .= " ".$title;
	if ($index_host == 1) {
		$file = $file." ".$host." ".$path;
	}
	if ($index_meta_keywords == 1) {
		$file = $file." ".$headdata['keywords'];
	}
	
	
	//replace codes with ascii chars
	$file = preg_replace('~&#x([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $file);
    $file = preg_replace('~&#([0-9]+);~e', 'chr("\\1")', $file);
	$file = strtolower($file);
	reset($entities);
	while ($char = each($entities)) {
		$file = preg_replace("/".$char[0]."/i", $char[1], $file);
	}
	$file = preg_replace("/&[a-z]{1,6};/", " ", $file);
	$file = preg_replace("/[\*\^\+\?\\\.\[\]\^\$\|\{\)\(\}~!\"\/@#?%&=`?><:,]+/", " ", $file);
	$file = preg_replace("/\s+/", " ", $file);
	$data['fulltext'] = addslashes($fulltext);
	$data['content'] = addslashes($file);
	$data['title'] = addslashes($title);
	$data['description'] = $headdata['description'];
	$data['keywords'] = $headdata['keywords'];
	$data['host'] = $host;
	$data['path'] = $path;
	$data['nofollow'] = $headdata['nofollow'];
	$data['noindex'] = $headdata['noindex'];
	$data['base'] = $headdata['base'];

	return $data;

}

function calc_weights($wordarray, $title, $host, $path, $keywords) {
	global $index_host, $index_meta_keywords;
	$hostarray = unique_array(explode(" ", preg_replace("/[^[:alnum:]-]+/i", " ", strtolower($host))));
	$patharray = unique_array(explode(" ", preg_replace("/[^[:alnum:]-]+/i", " ", strtolower($path))));
	$titlearray = unique_array(explode(" ", preg_replace("/[^[:alnum:]-]+/i", " ", strtolower($title))));
	$keywordsarray = unique_array(explode(" ", preg_replace("/[^[:alnum:]-]+/i", " ", strtolower($keywords))));
	$path_depth = countSubstrs($path, "/");

	while (list ($wid, $word) = each($wordarray)) {
		$word_in_path = 0;
		$word_in_domain = 0;
		$word_in_title = 0;
		$meta_keyword = 0;
		if ($index_host == 1) {
			while (list ($id, $path) = each($patharray)) {
				if ($path[1] == $word[1]) {
					$word_in_path = 1;
					break;
				}
			}
			reset($patharray);

			while (list ($id, $host) = each($hostarray)) {
				if ($host[1] == $word[1]) {
					$word_in_domain = 1;
					break;
				}
			}
			reset($hostarray);
		}

		if ($index_meta_keywords == 1) {
			while (list ($id, $keyword) = each($keywordsarray)) {
				if ($keyword[1] == $word[1]) {
					$meta_keyword = 1;
					break;
				}
			}
			reset($keywordsarray);
		}
		while (list ($id, $tit) = each($titlearray)) {
			if ($tit[1] == $word[1]) {
				$word_in_title = 1;
				break;
			}
		}
		reset($titlearray);

		$wordarray[$wid][2] = (int) (calc_weight($wordarray[$wid][2], $word_in_title, $word_in_domain, $word_in_path, $path_depth, $meta_keyword));
	}
	reset($wordarray);
	return $wordarray;
}

function isDuplicateMD5($md5sum) {
	global $mysql_table_prefix;
	$result = mysql_query("select link_id from ".$mysql_table_prefix."links where md5sum='$md5sum'");
	echo mysql_error();
	if (mysql_num_rows($result) > 0) {
		return true;
	}
	return false;
}

function check_include($link, $inc, $not_inc) {
	$url_inc = Array ();
	$url_not_inc = Array ();
	if ($inc != "") {
		$url_inc = explode("\n", $inc);
	}
	if ($not_inc != "") {
		$url_not_inc = explode("\n", $not_inc);
	}
	$oklinks = Array ();

	$include = true;
	foreach ($url_not_inc as $str) {
		$str = trim($str);
		if ($str != "") {
			if (substr($str, 0, 1) == '*') {
				if (preg_match(substr($str, 1), $link)) {
					$include = false;
					break;
				}
			} else {
				if (!(strpos($link, $str) === false)) {
					$include = false;
					break;
				}
			}
		}
	}
	if ($include && $inc != "") {
		$include = false;
		foreach ($url_inc as $str) {
			$str = trim($str);
			if ($str != "") {
				if (substr($str, 0, 1) == '*') {
					if (preg_match(substr($str, 1), $link)) {
						$include = true;
						break 2;
					}
				} else {
					if (strpos($link, $str) !== false) {
						$include = true;
						break;
					}
				}
			}
		}
	}
	return $include;
}

function check_for_removal($url) {
	global $mysql_table_prefix;
	global $command_line;
	$result = mysql_query("select link_id, visible from ".$mysql_table_prefix."links"." where url='$url'");
	echo mysql_error();
	if (mysql_num_rows($result) > 0) {
		$row = mysql_fetch_row($result);
		$link_id = $row[0];
		$visible = $row[1];
		if ($visible > 0) {
			$visible --;
			mysql_query("update ".$mysql_table_prefix."links set visible=$visible where link_id=$link_id");
			echo mysql_error();
		} else {
			mysql_query("delete from ".$mysql_table_prefix."links where link_id=$link_id");
			echo mysql_error();
			for ($i=0;$i<=15; $i++) {
				$char = dechex($i);
				mysql_query("delete from ".$mysql_table_prefix."link_keyword$char where link_id=$link_id");
				echo mysql_error();
			}
			printStandardReport('pageRemoved',$command_line);
		}
	}
}

function convert_url($url) {
	$url = str_replace("&amp;", "&", $url);
	$url = str_replace(" ", "%20", $url);
	return $url;
}

function extract_text($contents, $source_type) {
	global $tmp_dir, $pdftotext_path, $catdoc_path, $xls2csv_path, $catppt_path;

	$temp_file = "tmp_file";
	$filename = $tmp_dir."/".$temp_file ;
	if (!$handle = fopen($filename, 'w')) {
		die ("Cannot open file $filename");
	}

	if (fwrite($handle, $contents) === FALSE) {
		die ("Cannot write to file $filename");
	}
	
	fclose($handle);
	if ($source_type == 'pdf') {
		$command = $pdftotext_path." $filename -";
		$a = exec($command,$result, $retval);
	} else if ($source_type == 'doc') {
		$command = $catdoc_path." $filename";
		$a = exec($command,$result, $retval);
	} else if ($source_type == 'xls') {
		$command = $xls2csv_path." $filename";
		$a = exec($command,$result, $retval);
	} else if ($source_type == 'ppt') {
		$command = $catppt_path." $filename";
		$a = exec($command,$result, $retval);
	}

	unlink ($filename);
	return implode(' ', $result); 

}

//function to calculate the weight of pages
function calc_weight ($words_in_page, $word_in_title, $word_in_domain, $word_in_path, $path_depth, $meta_keyword) {
	global $title_weight, $domain_weight, $path_weight,$meta_weight;
	$weight = ($words_in_page + $word_in_title * $title_weight +
			  $word_in_domain * $domain_weight +
			  $word_in_path * $path_weight + $meta_keyword * $meta_weight) *10 / (0.8 +0.2*$path_depth);

	return $weight;
}
 
function  remove_sessid($url) {
		return preg_replace("/(\?|&)(PHPSESSID|JSESSIONID|ASPSESSIONID|sid)=[0-9a-zA-Z]+$/", "", $url);
}
?>
