global.func.php

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<?php

/*
	[Discuz!] (C)2001-2007 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$Id: global.func.php 13803 2008-06-04 09:49:43Z heyond $
*/

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


function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {

	$ckey_length = 4;
	$key = md5($key ? $key : $GLOBALS['discuz_auth_key']);
	$keya = md5(substr($key, 0, 16));
	$keyb = md5(substr($key, 16, 16));
	$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';

	$cryptkey = $keya.md5($keya.$keyc);
	$key_length = strlen($cryptkey);

	$string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
	$string_length = strlen($string);

	$result = '';
	$box = range(0, 255);

	$rndkey = array();
	for($i = 0; $i <= 255; $i++) {
		$rndkey[$i] = ord($cryptkey[$i % $key_length]);
	}

	for($j = $i = 0; $i < 256; $i++) {
		$j = ($j + $box[$i] + $rndkey[$i]) % 256;
		$tmp = $box[$i];
		$box[$i] = $box[$j];
		$box[$j] = $tmp;
	}

	for($a = $j = $i = 0; $i < $string_length; $i++) {
		$a = ($a + 1) % 256;
		$j = ($j + $box[$a]) % 256;
		$tmp = $box[$a];
		$box[$a] = $box[$j];
		$box[$j] = $tmp;
		$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
	}

	if($operation == 'DECODE') {
		if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
			return substr($result, 26);
		} else {
			return '';
		}
	} else {
		return $keyc.str_replace('=', '', base64_encode($result));
	}

}

function clearcookies() {
	global $discuz_uid, $discuz_user, $discuz_pw, $discuz_secques, $adminid, $credits;
	dsetcookie('sid', '', -86400 * 365);
	dsetcookie('auth', '', -86400 * 365);
	dsetcookie('visitedfid', '', -86400 * 365);
	dsetcookie('onlinedetail', '', -86400 * 365, 0);
	dsetcookie('loginuser', '', -86400 * 365);
	dsetcookie('activationauth', '', -86400 * 365);

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

function checklowerlimit($creditsarray, $coef = 1) {
	if(is_array($creditsarray)) {
		global $extcredits, $id;
		foreach($creditsarray as $id => $addcredits) {
			$addcredits = $addcredits * $coef;
			if($addcredits < 0 && ($GLOBALS['extcredits'.$id] < $extcredits[$id]['lowerlimit'] || (($GLOBALS['extcredits'.$id] + $addcredits) < $extcredits[$id]['lowerlimit']))) {
				if($coef == 1) {
					showmessage('credits_policy_lowerlimit');
				} else {
					showmessage('credits_policy_num_lowerlimit');
				}
			}
		}
	}
}


function checkmd5($md5, $verified, $salt = '') {
	if(md5($md5.$salt) == $verified) {
		$result = !empty($salt) ? 1 : 2;
	} elseif(empty($salt)) {
		$result = $md5 == $verified ? 3 : ((strlen($verified) == 16 && substr($md5, 8, 16) == $verified) ? 4 : 0);
	} else {
		$result = 0;
	}
	return $result;
}

function checktplrefresh($maintpl, $subtpl, $timecompare, $templateid, $tpldir) {
	global $tplrefresh;
	if(empty($timecompare) || $tplrefresh == 1 || ($tplrefresh > 1 && !($GLOBALS['timestamp'] % $tplrefresh))) {
		if(empty($timecompare) || @filemtime($subtpl) > $timecompare) {
			require_once DISCUZ_ROOT.'./include/template.func.php';
			parse_template($maintpl, $templateid, $tpldir);
			return TRUE;
		}
	}
	return 	FALSE;
}

function cutstr($string, $length, $dot = ' ...') {
	global $charset;

	if(strlen($string) <= $length) {
		return $string;
	}

	$string = str_replace(array('&amp;', '&quot;', '&lt;', '&gt;'), array('&', '"', '<', '>'), $string);

	$strcut = '';
	if(strtolower($charset) == 'utf-8') {

		$n = $tn = $noc = 0;
		while($n < strlen($string)) {

			$t = ord($string[$n]);
			if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
				$tn = 1; $n++; $noc++;
			} elseif(194 <= $t && $t <= 223) {
				$tn = 2; $n += 2; $noc += 2;
			} elseif(224 <= $t && $t < 239) {
				$tn = 3; $n += 3; $noc += 2;
			} elseif(240 <= $t && $t <= 247) {
				$tn = 4; $n += 4; $noc += 2;
			} elseif(248 <= $t && $t <= 251) {
				$tn = 5; $n += 5; $noc += 2;
			} elseif($t == 252 || $t == 253) {
				$tn = 6; $n += 6; $noc += 2;
			} else {
				$n++;
			}

			if($noc >= $length) {
				break;
			}

		}
		if($noc > $length) {
			$n -= $tn;
		}

		$strcut = substr($string, 0, $n);

	} else {
		for($i = 0; $i < $length; $i++) {
			$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
		}
	}

	$strcut = str_replace(array('&', '"', '<', '>'), array('&amp;', '&quot;', '&lt;', '&gt;'), $strcut);

	return $strcut.$dot;
}

function daddslashes($string, $force = 0) {
	!defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
	if(!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 datecheck($ymd, $sep='-') {
	if(!empty($ymd)) {
		list($year, $month, $day) = explode($sep, $ymd);
		return checkdate($month, $day, $year);
	} else {
		return FALSE;
	}
}

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 dfopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE) {
	$return = '';
	$matches = parse_url($url);
	$host = $matches['host'];
	$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
	$port = !empty($matches['port']) ? $matches['port'] : 80;

	if($post) {
		$out = "POST $path HTTP/1.0\r\n";
		$out .= "Accept: */*\r\n";
		//$out .= "Referer: $boardurl\r\n";
		$out .= "Accept-Language: zh-cn\r\n";
		$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
		$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
		$out .= "Host: $host\r\n";
		$out .= 'Content-Length: '.strlen($post)."\r\n";
		$out .= "Connection: Close\r\n";
		$out .= "Cache-Control: no-cache\r\n";
		$out .= "Cookie: $cookie\r\n\r\n";
		$out .= $post;
	} else {
		$out = "GET $path HTTP/1.0\r\n";
		$out .= "Accept: */*\r\n";
		//$out .= "Referer: $boardurl\r\n";
		$out .= "Accept-Language: zh-cn\r\n";
		$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
		$out .= "Host: $host\r\n";
		$out .= "Connection: Close\r\n";
		$out .= "Cookie: $cookie\r\n\r\n";
	}
	$fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
	if(!$fp) {
		return '';
	} else {
		stream_set_blocking($fp, $block);
		stream_set_timeout($fp, $timeout);
		@fwrite($fp, $out);
		$status = stream_get_meta_data($fp);
		if(!$status['timed_out']) {
			while (!feof($fp)) {
				if(($header = @fgets($fp)) && ($header == "\r\n" ||  $header == "\n")) {
					break;
				}
			}

			$stop = false;
			while(!feof($fp) && !$stop) {
				$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
				$return .= $data;
				if($limit) {
					$limit -= strlen($data);
					$stop = $limit <= 0;
				}
			}
		}
		@fclose($fp);
		return $return;
	}
}

function dhtmlspecialchars($string) {
	if(is_array($string)) {
		foreach($string as $key => $val) {
			$string[$key] = dhtmlspecialchars($val);
		}
	} else {
		$string = preg_replace('/&amp;((#(\d{3,5}|x[a-fA-F0-9]{4})|[a-zA-Z][a-z0-9]{2,5});)/', '&\\1',
		str_replace(array('&', '"', '<', '>'), array('&amp;', '&quot;', '&lt;', '&gt;'), $string));
	}
	return $string;
}

function dheader($string, $replace = true, $http_response_code = 0) {
	$string = str_replace(array("\r", "\n"), array('', ''), $string);
	if(empty($http_response_code) || PHP_VERSION < '4.3' ) {
		@header($string, $replace);
	} else {
		@header($string, $replace, $http_response_code);
	}
	if(preg_match('/^\s*location:/is', $string)) {
		exit();
	}
}

function disuploadedfile($file) {
	return function_exists('is_uploaded_file') && (is_uploaded_file($file) || is_uploaded_file(str_replace('\\\\', '\\', $file)));
}


function dreferer($default = '') {
	global $referer, $indexname;

	$default = empty($default) ? $indexname : '';
	if(empty($referer) && isset($GLOBALS['_SERVER']['HTTP_REFERER'])) {
		$referer = preg_replace("/([\?&])((sid\=[a-z0-9]{6})(&|$))/i", '\\1', $GLOBALS['_SERVER']['HTTP_REFERER']);
		$referer = substr($referer, -1) == '?' ? substr($referer, 0, -1) : $referer;
	} else {
		$referer = dhtmlspecialchars($referer);
	}

	if(!preg_match("/(\.php|[a-z]+(\-\d+)+\.html)/", $referer) || strpos($referer, 'logging.php')) {
		$referer = $default;
	}
	return $referer;
}

function dsetcookie($var, $value, $life = 0, $prefix = 1) {
	global $cookiepre, $cookiedomain, $cookiepath, $timestamp, $_SERVER;
	setcookie(($prefix ? $cookiepre : '').$var, $value,
		$life ? $timestamp + $life : 0, $cookiepath,
		$cookiedomain, $_SERVER['SERVER_PORT'] == 443 ? 1 : 0);
}

function dunlink($filename, $havethumb = 0, $remote = 0) {
	global $authkey, $ftp, $attachdir;
	if($remote) {
		require_once DISCUZ_ROOT.'./include/ftp.func.php';
		if(!$ftp['connid']) {
			if(!($ftp['connid'] = dftp_connect($ftp['host'], $ftp['username'], authcode($ftp['password'], 'DECODE', md5($authkey)), $ftp['attachdir'], $ftp['port'], $ftp['ssl']))) {
				return;
			}
		}
		dftp_delete($ftp['connid'], $filename);
		$havethumb && dftp_delete($ftp['connid'], $filename.'.thumb.jpg');
	} else {
		@unlink($attachdir.'/'.$filename);
		$havethumb && @unlink($attachdir.'/'.$filename.'.thumb.jpg');
	}
}

function emailconv($email, $tolink = 1) {
	$email = str_replace(array('@', '.'), array('&#64;', '&#46;'), $email);
	return $tolink ? '<a href="mailto: '.$email.'">'.$email.'</a>': $email;
}

function errorlog($type, $message, $halt = 1) {
	global $timestamp, $discuz_userss, $onlineip, $_SERVER;
	$user = empty($discuz_userss) ? '' : $discuz_userss.'<br />';
	$user .= $onlineip.'|'.$_SERVER['REMOTE_ADDR'];
	writelog('errorlog', dhtmlspecialchars("$timestamp\t$type\t$user\t".str_replace(array("\r", "\n"), array(' ', ' '), trim($message))));
	if($halt) {
		exit();
	}
}

function fileext($filename) {
	return trim(substr(strrchr($filename, '.'), 1, 10));
}

function formhash($specialadd = '') {
	global $discuz_user, $discuz_uid, $discuz_pw, $timestamp, $discuz_auth_key;
	$hashadd = defined('IN_ADMINCP') ? 'Only For Discuz! Admin Control Panel' : '';
	return substr(md5(substr($timestamp, 0, -7).$discuz_user.$discuz_uid.$discuz_pw.$discuz_auth_key.$hashadd.$specialadd), 8, 8);
}

function forumperm($permstr) {