global.func.php

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<?php

/*
	[DISCUZ!] include/global.func.php - Crossday Discuz! Board global functions
	This is NOT a freeware, use is subject to license terms

	Version: 4.0.0
	Web: http://www.comsenz.com
	Copyright: 2001-2005 Comsenz Technology Ltd.
	Last Modified: 2004/12/18 03:52
*/

if(!defined('IN_DISCUZ')) {
	exit('Access Denied');
}

function authcode($string, $operation) {
	global $discuz_auth_key;

	$coded = '';
	$keylength = strlen($discuz_auth_key);
	$string = $operation == 'DECODE' ? base64_decode($string) : $string;
	for($i = 0; $i < strlen($string); $i += $keylength) {
		$coded .= substr($string, $i, $keylength) ^ $discuz_auth_key;
	}
	$coded = $operation == 'ENCODE' ? str_replace('=', '', base64_encode($coded)) : $coded;
	return $coded;
}

function clearcookies() {
	global $timestamp, $cookiepath, $cookiedomain, $discuz_uid, $discuz_user, $discuz_pw, $discuz_secques, $adminid, $groupid, $credits;
	dsetcookie('auth', '', -86400 * 365);

	// clear cookies defined in older version (transitional operation)
	setcookie('_discuz_uid', '', $timestamp - 86400 * 365, $cookiepath, $cookiedomain);
	setcookie('_discuz_pw', '', $timestamp - 86400 * 365, $cookiepath, $cookiedomain);
	setcookie('_discuz_secques', '', $timestamp - 86400 * 365, $cookiepath, $cookiedomain);
	setcookie('onlinedetail', '', $timestamp - 86400 * 365, $cookiepath, $cookiedomain);
	// end

	$discuz_uid = $adminid = $credits = 0;
	$discuz_user = $discuz_pw = $discuz_secques = '';
}

function cutstr($string, $length) {
	if(strlen($string) > $length) {
		for($i = 0; $i < $length - 3; $i++) {
			$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
		}
		return $strcut.' ...';
	} else {
		return $string;
	}
}

function daddslashes($string, $force = 0) {
	if(!$GLOBALS['magic_quotes_gpc'] || $force) {
		if(is_array($string)) {
			foreach($string as $key => $val) {
				$string[$key] = daddslashes($val, $force);
			}
		} else {
			$string = addslashes($string);
		}
	}
	return $string;
}

function debuginfo() {
	if($GLOBALS['debug']) {
		global $db, $discuz_starttime, $debuginfo;
		$mtime = explode(' ', microtime());
		$debuginfo = array('time' => number_format(($mtime[1] + $mtime[0] - $discuz_starttime), 6), 'queries' => $db->querynum);
		return TRUE;
	} else {
		return FALSE;
	}
}

function dexit($message = '') {
	echo $message;
	output();
	exit();
}

function dhtmlspecialchars($string) {
	if(is_array($string)) {
		foreach($string as $key => $val) {
			$string[$key] = dhtmlspecialchars($val);
		}
	} else {
		$string = str_replace('&', '&amp;', $string);
		$string = str_replace('"', '&quot;', $string);
		$string = str_replace('<', '&lt;', $string);
		$string = str_replace('>', '&gt;', $string);
		$string = preg_replace('/&amp;(#\d{3,5};)/', '&\\1', $string);
	}
	return $string;
}

function disuploadedfile($file) {
	return function_exists('is_uploaded_file') && is_uploaded_file($file) ? TRUE : FALSE;
}

function dreferer($default = 'index.php') {
	global $referer;

	if(empty($referer) && isset($GLOBALS['HTTP_SERVER_VARS']['HTTP_REFERER'])) {
		$referer = preg_replace("/(?:([\?&]sid\=[a-z0-9]{8}&?))/i", '', $GLOBALS['HTTP_SERVER_VARS']['HTTP_REFERER']);
		$referer = substr($referer, -1) == '?' ? substr($referer, 0, -1) : $referer;
	} else {
		$referer = dhtmlspecialchars($referer);
	}

	if(!strpos($referer, '.php') || strpos($referer, 'logging.php')) {
		$referer = $default;
	}
	return $referer;		
}

function dsetcookie($var, $value, $life = 0) {
	global $tablepre, $cookiedomain, $cookiepath, $timestamp;
	setcookie($tablepre.$var, $value, $life ? $timestamp + $life : 0, $cookiepath, $cookiedomain);
}

function errorlog($type, $message, $halt = 1) {
	@$fp = fopen(DISCUZ_ROOT.'./forumdata/errorlog.php', 'a');
	@fwrite($fp, "$GLOBALS[timestamp]\t$type\t$GLOBALS[discuz_user]\t".str_replace(array("\r", "\n"), array(' ', ' '), trim(dhtmlspecialchars($message)))."\n");
	@fclose($fp);
	if($halt) {
		dexit();
	}
}

function fileext($filename) {
	return trim(substr(strrchr($filename, '.'), 1));
}

function formhash() {
	global $discuz_user, $discuz_uid, $discuz_pw, $timestamp;
	return substr(md5(substr($timestamp, 0, -7).$discuz_user.$discuz_uid.$discuz_pw), 8, 8);
}

function image($imageinfo, $basedir = '', $remark = '') {
	if($basedir) {
		$basedir .= '/';
	}
	if(strstr($imageinfo, ',')) {
		$flash = explode(",", $imageinfo);
		return "<embed src=\"$basedir".trim($flash[0])."\" width=\"".trim($flash[1])."\" height=\"".trim($flash[2])."\" type=\"application/x-shockwave-flash\" $remark></embed>";
	} else {
		return "<img src=\"$basedir$imageinfo\" $remark border=\"0\">";
	}
}

function ipbanned($onlineip) {
	global $timestamp, $cachelost;

	$cachelost .= (@include DISCUZ_ROOT.'./forumdata/cache/cache_ipbanned.php') ? '' : ' ipbanned';
	if($_DCACHE['ipbanned']) {
		if($_DCACHE['ipbanned']['expiration'] < $timestamp) {
			@unlink(DISCUZ_ROOT.'./forumdata/cache/cache_ipbanned.php');
		}
		return preg_match("/(".$_DCACHE['ipbanned']['regexp'].")/", $onlineip) ? TRUE : FALSE;
	}
}

function isemail($email) {
	return strlen($email) > 8 && preg_match("/^[-_.[:alnum:]]+@((([[:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+([a-z]{2,4})|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i", $email);
}

function ispage($number) {
	return !empty($number) && preg_match ("/^([0-9]+)$/", $number);
}

function language($file, $templateid = 0, $tpldir = '') {
	$tpldir = $tpldir ? $tpldir : TPLDIR;
	$templateid = $templateid ? $templateid : TEMPLATEID;

	$languagepack = DISCUZ_ROOT.'./'.$tpldir.'/'.$file.'.lang.php';
	if(file_exists($languagepack)) {
		return $languagepack;
	} elseif($templateid != 1 && $tpldir != './templates/default') {
		return language($file, 1, './templates/default');
	} else {
		return FALSE;
	}
}

function multi($num, $perpage, $curpage, $mpurl, $maxpages = 0) {
	$mpurl .= strpos($mpurl, '?') ? '&' : '?';
	if($num > $perpage) {
		$page = 10;
		$offset = 2;

		$realpages = ceil($num / $perpage);
		$pages = $maxpages && $maxpages < $realpages ? $maxpages : $realpages;
		
		$from = $curpage - $offset;
		$to = $curpage + $page - $offset - 1;
		if($page > $pages) {
			$from = 1;
			$to = $pages;
		} else {
			if($from < 1) {
				$to = $curpage + 1 - $from;
				$from = 1;
				if(($to - $from) < $page && ($to - $from) < $pages) {
					$to = $page;
				}
			} elseif($to > $pages) {
				$from = $curpage - $pages + $to;
				$to = $pages;