global.func.php

论坛软件系统亦称电子公告板(BBS)系统

<?php

/*
	[Discuz!] (C)2001-2006 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$RCSfile: global.func.php,v $
	$Revision: 1.83.2.6 $
	$Date: 2006/09/28 02:34:15 $
*/

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

function authcode($string, $operation, $key = '') {
	$key = $key ? $key : $GLOBALS['discuz_auth_key'];

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

function avatarshow($id, $gender = 0) {
	global $discuz_uid, $avatarshowid, $avatarshow_license, $avatarshowlink, $avatarshowheight, $avatarshowwidth;
	return '<iframe marginwidth="0" marginheight="0" frameborder="0" scrolling="no" height="'.$avatarshowheight.'" width="'.$avatarshowwidth.'" src="api/avatarshow.php?uid='.$discuz_uid.'&amp;thisid='.$avatarshowid.'&amp;id='.$id.'&amp;license='.$avatarshow_license.'&amp;width='.$avatarshowwidth.'&amp;height='.$avatarshowheight.'gender='.$gender.'&amp;link='.$avatarshowlink.'"></iframe>';
}

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

	// clear cookies defined in older version (transitional operation)
	dsetcookie('_discuz_uid', '', -86400 * 365, 0);
	dsetcookie('_discuz_pw', '', -86400 * 365, 0);
	dsetcookie('_discuz_secques', '', -86400 * 365, 0);
	dsetcookie('onlinedetail', '', -86400 * 365, 0);
	// end

	$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 => $addcredits) {
			if($addcredits * $coef < 0 && $GLOBALS['extcredits'.$id] < $extcredits[$id]['lowerlimit']) {
				showmessage('credits_policy_lowerlimit');
			}
		}
	}
}

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

	if(strlen($string) <= $length) {
		return $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 < $length - strlen($dot) - 1; $i++) {
			$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
		}
	}

	return $strcut.$dot;
}

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

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, $discuz_userss;
	@$fp = fopen(DISCUZ_ROOT.'./forumdata/errorlog.php', 'a');
	@fwrite($fp, "<?PHP exit('Access Denied'); ?>\t$timestamp\t$type\t$discuz_userss\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 forumperm($permstr) {
	global $groupid, $extgroupids;

	$groupidarray = array($groupid);
	foreach(explode("\t", $extgroupids) as $extgroupid) {
		if($extgroupid = intval(trim($extgroupid))) {
			$groupidarray[] = $extgroupid;
		}
	}
	return preg_match("/(^|\t)(".implode('|', $groupidarray).")(\t|$)/", $permstr);
}

function getgroupid($uid, $group, &$member) {
	global $creditsformula, $db, $tablepre;

	if(!empty($creditsformula)) {
		$updatearray = array();
		eval("\$credits = round($creditsformula);");

		if($credits != $member['credits']) {
			$updatearray[] = "credits='$credits'";
		}
		if($group['type'] == 'member' && !($member['credits'] >= $group['creditshigher'] && $member['credits'] < $group['creditslower'])) {
			$query = $db->query("SELECT groupid FROM {$tablepre}usergroups WHERE type='member' AND $member[credits]>=creditshigher AND $member[credits]<creditslower LIMIT 1");
			if($db->num_rows($query)) {
				$member['groupid'] = $db->result($query, 0);
				$updatearray[] = "groupid='$member[groupid]'";
			}
		}

		if($updatearray) {
			$db->query("UPDATE {$tablepre}members SET ".implode(', ', $updatearray)." WHERE uid='$uid'");
		}
	}

	return $member['groupid'];
}

function groupexpiry($terms) {
	$terms = is_array($terms) ? $terms : unserialize($terms);
	$groupexpiry = isset($terms['main']['time']) ? intval($terms['main']['time']) : 0;
	if(is_array($terms['ext'])) {
		foreach($terms['ext'] as $expiry) {
			if((!$groupexpiry && $expiry) || $expiry < $groupexpiry) {
				$groupexpiry = $expiry;
			}
		}
	}
	return $groupexpiry;
}

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 ipaccess($ip, $accesslist) {
	return preg_match("/^(".str_replace(array("\r\n", ' '), array('|', ''), preg_quote($accesslist, '/')).")/", $ip);
}
function ipbanned($onlineip) {
	global $ipaccess, $timestamp, $cachelost;

	if($ipaccess && !ipaccess($onlineip, $ipaccess)) {
		return TRUE;
	}

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

function isemail($email) {
	return strlen($email) > 6 && preg_match("/^[\w\-\.]+@[\w\-]+(\.\w+)+$/", $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) {
	$multipage = '';
	$mpurl .= strpos($mpurl, '?') ? '&amp;' : '?';
	if($num > $perpage) {
		$page = 10;
		$offset = 2;

		$realpages = @ceil($num / $perpage);
		$pages = $maxpages && $maxpages < $realpages ? $maxpages : $realpages;

		if($page > $pages) {
			$from = 1;
			$to = $pages;
		} else {
			$from = $curpage - $offset;
			$to = $from + $page - 1;
			if($from < 1) {
				$to = $curpage + 1 - $from;
				$from = 1;
				if($to - $from < $page) {
					$to = $page;
				}
			} elseif($to > $pages) {
				$from = $pages - $page + 1;
				$to = $pages;
			}
		}

		$multipage = ($curpage - $offset > 1 && $pages > $page ? '<a class="p_redirect" href="'.$mpurl.'page=1">|&lsaquo;</a>' : '').
			($curpage > 1 ? '<a class="p_redirect" href="'.$mpurl.'page='.($curpage - 1).'">&lsaquo;&lsaquo;</a>' : '');
		for($i = $from; $i <= $to; $i++) {
			$multipage .= $i == $curpage ? '<a class="p_curpage">'.$i.'</a>' :
				'<a href="'.$mpurl.'page='.$i.'" class="p_num">'.$i.'</a>';
		}

		$multipage .= ($curpage < $pages ? '<a class="p_redirect" href="'.$mpurl.'page='.($curpage + 1).'">&rsaquo;&rsaquo;</a>' : '').
			($to < $pages ? '<a class="p_redirect" href="'.$mpurl.'page='.$pages.'">&rsaquo;|</a>' : '').
			($curpage == $maxpages ? '<a class="p_redirect" href="misc.php?action=maxpages&amp;pages='.$maxpages.'">&rsaquo;?</a>' : '').
			($pages > $page ? '<a class="p_pages" style="padding: 0px"><input class="p_input" type="text" name="custompage" onKeyDown="if(event.keyCode==13) {window.location=\''.$mpurl.'page=\'+this.value; return false;}"></a>' : '');

		$multipage = $multipage ? '<div class="p_bar"><a class="p_total">&nbsp;'.$num.'&nbsp;</a><a class="p_pages">&nbsp;'.$curpage.'/'.$realpages.'&nbsp;</a>'.$multipage.'</div>' : '';
	}
	return $multipage;
}

function output() {
	global $sid, $transsidstatus, $rewritestatus;

	if(($transsidstatus = empty($GLOBALS['_DCOOKIE']['sid']) && $transsidstatus) || in_array($rewritestatus, array(2, 3))) {
		if($transsidstatus) {
			$searcharray = array
				(
				"/\<a(\s*[^\>]+\s*)href\=([\"|\']?)([^\"\'\s]+)/ies",
				"/(\<form.+?\>)/is"
				);
			$replacearray = array
				(
				"transsid('\\3','<a\\1href=\\2')",
				"\\1\n<input type=\"hidden\" name=\"sid\" value=\"$sid\">"
				);
		} else {
			$searcharray = array
				(
				//"/\<a href\=\"index\.php\"\>/",
				"/\<a href\=\"forumdisplay\.php\?fid\=(\d+)(&amp;page\=(\d+))?\"([^\>]*)\>/e",
				"/\<a href\=\"viewthread\.php\?tid\=(\d+)(&amp;extra\=page\%3D(\d+))?(&amp;page\=(\d+))?\"([^\>]*)\>/e",
				"/\<a href\=\"viewpro\.php\?(uid\=(\d+)|username\=([^&]+?))\"([^\>]*)\>/e"
				);
			$replacearray = array
				(
				//"<a href=\"index.html\">",
				"rewrite_forum('\\1', '\\3', '\\4')",
				"rewrite_thread('\\1', '\\5', '\\3', '\\6')",
				"rewrite_profile('\\2', '\\3', '\\4')"
				);
		}

		$content = preg_replace($searcharray, $replacearray, ob_get_contents());
		ob_end_clean();
		$GLOBALS['gzipcompress'] ? ob_start('ob_gzhandler') : ob_start();