在软件开发和调试阶段，可以使用error_reporting(E_ALL);作为默认的错误报告级别，此级别能够报告程序中所有的错误、警告和提示信息，以帮助开发者检查和核对代码，避免大多数安全性问题和逻辑错误、拼写错误。error_reporting()可以在config/config_global.php中添加一行$_config['debug'] = 1;debug值可以在0~2之间取值，数值越大报错等级越高。
在软件发布时，请使用error_reporting(E_ERROR | E_WARNING | E_PARSE);作为默认的错误报告级别，以利于用户使用并将无谓错误提示信息降至最低。
最后在\source\function下新建function_debug.php文件并添加如下代码：
<?php /** * [Discuz!] (C)2001-2099 Comsenz Inc. * This is NOT a freeware, use is subject to license terms * * $Id: function_debug.php 20537 2011-02-25 08:03:54Z monkey $ */ if(!empty($_GET['debugaction'])) { if($_GET['debugaction'] == 'connect' && !empty($_GET['redirect_url'])) { chdir('../../'); require './source/class/class_core.php'; $discuz = & discuz_core::instance(); $discuz->init(); $uin = md5($_GET['qq']); $get = array( 'con_expires_in' => '3600', 'con_access_token' => '501|1290144222.3600|48d855c11ecb426c9838|LskyfOZ0moKUfEMINrYmuTaZmlP-xavvfeIM7Ylwi3c.', 'con_uin' => $uin, 'con_is_unbind' => '1', 'con_x_nick' => '', 'con_x_sex' => 'unknown', 'con_x_birthday' => '1977-01-01', 'con_x_email' => '1@22.net', 'con_x_usernames' => base64_encode('User1,User2'), ); ksort($get); $str = ''; foreach($get as $k => $v) { if($v) { $str .= $k.'='.$v.'&'; } } $get['con_sig'] = md5($str.$_G['setting']['connectsitekey']); header('location: '.$_GET['redirect_url'].'&'.http_build_query($get)); } exit; } if(!defined('IN_DISCUZ')) { exit('Access Denied'); } function debugmessage($ajax = 0) { $m = function_exists('memory_get_usage') ? number_format(memory_get_usage()) : ''; $mt = function_exists('memory_get_peak_usage') ? number_format(memory_get_peak_usage()) : ''; if($m) { $m = 'Memory usage <s>'.$m.'</s> bytes'.($mt ? ', peak <s>'.$mt.'</s> bytes' : '').' / '; } global $_G; $debugfile = $_G['adminid'] == 1 ? '_debugadmin.php' : '_debug.php'; $akey = md5(random(10)); if(!defined('DISCUZ_DEBUG') || !DISCUZ_DEBUG || defined('IN_ARCHIVER') || defined('IN_MOBILE')) { return; } $phpinfok = 'I'; $viewcachek = 'C'; $mysqlplek = 'P'; $includes = get_included_files(); require_once DISCUZ_ROOT.'./source/discuz_version.php'; $sqldebug = ''; $sqlw = array(); $db = & DB::object(); $queries = count($db->sqldebug); foreach ($db->sqldebug as $string) { $sqldebug .= '<li><br />'.$string[1].'s • '.nl2br(htmlspecialchars($string[0])).'<br /></li>'; if(preg_match('/^SELECT /', $string[0])) { $query = DB::query("EXPLAIN ".$string[0]); $i = 0; $sqldebug .= '<table style="border-bottom:none">'; while($row = DB::fetch($query)) { if(!$i) { $sqldebug .= '<tr style="border-bottom:1px dotted gray"><td> '.implode(' </td><td> ', array_keys($row)).' </td></tr>'; $i++; } if(strexists($row['Extra'], 'Using filesort')) { $sqlw['Using filesort']++; $row['Extra'] = str_replace('Using filesort', '<font color=red>Using filesort</font>', $row['Extra']); } if(strexists($row['Extra'], 'Using temporary')) { $sqlw['Using temporary']++; $row['Extra'] = str_replace('Using temporary', '<font color=red>Using temporary</font>', $row['Extra']); } $sqldebug .= '<tr><td> '.implode(' </td><td> ', $row).' </td></tr>'; } $sqldebug .= '</table>'; } $sqldebug .= '<table><tr style="border-bottom:1px dotted gray"><td width="270">File</td><td width="80">Line</td><td>Function</td></tr>'; foreach($string[2] as $error) { $error['file'] = str_replace(DISCUZ_ROOT, '', $error['file']); $error['class'] = isset($error['class']) ? $error['class'] : ''; $error['type'] = isset($error['type']) ? $error['type'] : ''; $error['function'] = isset($error['function']) ? $error['function'] : ''; $sqldebug .= "<tr><td>$error[file]</td><td>$error[line]</td><td>$error[class]$error[type]$error[function]()</td></tr>"; } $sqldebug .= '</table>'; } $ajaxhtml = 'data/'.$debugfile.'_ajax.php'; if($ajax) { $idk = substr(md5($_SERVER['SCRIPT_NAME'].'?'.$_SERVER['QUERY_STRING']), 0, 4); $sqldebug = '<b style="cursor:pointer" onclick="document.getElementById(\''.$idk.'\').style.display=document.getElementById(\''.$idk.'\').style.display == \'\' ? \'none\' : \'\'">Queries: </b> '.$queries.' ('.$_SERVER['SCRIPT_NAME'].'?'.$_SERVER['QUERY_STRING'].')<ol id="'.$idk.'" style="display:none">'.$sqldebug.'</ol><br>'; file_put_contents(DISCUZ_ROOT.'./'.$ajaxhtml, $sqldebug, FILE_APPEND); return; } file_put_contents(DISCUZ_ROOT.'./'.$ajaxhtml, '<?php if(empty($_GET[\'k\']) || $_GET[\'k\'] != \''.$akey.'\') { exit; } ?><style>body,table { font-size:12px; }table { width:90%;border:1px solid gray; }</style><a href="javascript:;" onclick="location.href=location.href">Refresh</a><br />'); foreach($sqlw as $k => $v) { $sqlw[$k] = $k.': '.$v; } $sqlw = $sqlw ? '<s>('.implode(', ', $sqlw).')</s>' : ''; $debug = '<?php if(empty($_GET[\'k\']) || $_GET[\'k\'] != \''.$akey.'\') { exit; } ?>'; if($_G['adminid'] == 1 && !$ajax) { $debug .= '<?php if(isset($_GET[\''.$phpinfok.'\'])) { phpinfo(); exit; } elseif(isset($_GET[\''.$viewcachek.'\'])) { chdir(\'../\'); require \'./source/class/class_core.php\'; $discuz = & discuz_core::instance(); $discuz->init(); echo \'<style>body { font-size:12px; }</style>\'; if(!isset($_GET[\'c\'])) { $query = DB::query("SELECT cname FROM ".DB::table("common_syscache")); while($names = DB::fetch($query)) { echo \'<a href="'.$debugfile.'?k='.$akey.'&'.$viewcachek.'&c=\'.$names[\'cname\'].\'" target="_blank" style="float:left;width:200px">\'.$names[\'cname\'].\'</a>\'; } } else { loadcache($_GET[\'c\']); echo \'$_G[\\\'cache\\\'][\'.$_GET[\'c\'].\']<br>\'; debug($_G[\'cache\'][$_GET[\'c\']]); } exit; } elseif(isset($_GET[\''.$mysqlplek.'\'])) { chdir(\'../\'); require \'./source/class/class_core.php\'; $discuz = & discuz_core::instance(); $discuz->_init_db(); if(!empty($_GET[\'Id\'])) { $query = DB::query("KILL ".floatval($_GET[\'Id\']), \'SILENT\'); } $query = DB::query("SHOW FULL PROCESSLIST"); echo \'<style>table { font-size:12px; }</style>\'; echo \'<table style="border-bottom:none">\'; while($row = DB::fetch($query)) { if(!$i) { echo \'<tr style="border-bottom:1px dotted gray"><td> </td><td> \'.implode(\' </td><td> \', array_keys($row)).\' </td></tr>\'; $i++; } echo \'<tr><td><a href="'.$debugfile.'?k='.$akey.'&P&Id=\'.$row[\'Id\'].\'">[Kill]</a></td><td> \'.implode(\' </td><td> \', $row).\' </td></tr>\'; } echo \'</table>\'; exit; } ?>'; } $debug .= '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>'; $debug .= "<script src='../static/js/common.js?".VERHASH."'></script><script> function switchTab(prefix, current, total, activeclass) { activeclass = !activeclass ? 'a' : activeclass; for(var i = 1; i <= total;i++) { var classname = ' '+$(prefix + '_' + i).className+' '; $(prefix + '_' + i).className = classname.replace(' '+activeclass+' ','').substr(1); $(prefix + '_c_' + i).style.display = 'none'; } $(prefix + '_' + current).className = $(prefix + '_' + current).className + ' '+activeclass; $(prefix + '_c_' + current).style.display = ''; } </script>"; if(!defined('IN_ADMINCP') && file_exists(DISCUZ_ROOT.'./static/image/common/temp-grid.png')) $debug .= <<<EOF <script type="text/javascript"> var s = '<button style="position: fixed; width: 40px; right: 0; top: 30px; border: none; border:1px solid orange;background: yellow; color: red; cursor: pointer;" onclick="var pageHight = top.document.body.clientHeight;$(\'tempgrid\').style.height = pageHight + \'px\';$(\'tempgrid\').style.visibility = top.$(\'tempgrid\').style.visibility == \'hidden\'?\'\':\'hidden\';o.innerHTML = o.innerHTML == \'网格\'?\'关闭\':\'网格\';">网格</button>'; s += '<div id="tempgrid" style="position: absolute; top: 0px; left: 50%; margin-left: -500px; width: 1000px; height: 0; background: url(static/image/common/temp-grid.png); visibility :hidden;"></div>'; top.$('_debug_div').innerHTML = s; </script> EOF; $_GS = $_GA = ''; if($_G['adminid'] == 1) { foreach($_G as $k => $v) { if(is_array($v)) { if($k != 'lang') { $_GA .= "<li><a name=\"S_$k\"></a><br />['$k'] => ".nl2br(str_replace(' ',' ', htmlspecialchars(print_r($v, true)))).'</li>'; } } elseif(is_object($v)) { $_GA .= "<li><br />['$k'] => <i>object of ".get_class($v)."</i></li>"; } else { $_GS .= "<li><br />['$k'] => ".htmlspecialchars($v)."</li>"; } } } $modid = $_G['basescript'].(!defined('IN_ADMINCP') ? '::'.CURMODULE : ''); $svn = ''; if(file_exists(DISCUZ_ROOT.'./.svn/entries')) { $svn = @file(DISCUZ_ROOT.'./.svn/entries'); $time = $svn[9]; preg_match('/([\d\-]+)T([\d:]+)/', $time, $a); $svn = ' / SVN '.$svn[10].' by '.$svn[11].' on '.dgmdate(strtotime($a[1].' '.$a[2]) + $_G['setting']['timeoffset'] * 3600); } $max = $_G['adminid'] == 1 ? 6 : 5; $debug .= ' <style>#__debugbarwrap__ { line-height:10px; text-align:left;font:12px Monaco,Consolas,"Lucida Console","Courier New",serif;} body { font-size:12px; } a, a:hover { color: black;text-decoration:none; } s { text-decoration:none;color: red; } img { vertical-align:middle; } #__debugbar__ { padding: 80px 1px 0 1px; } #__debugbar__ table { width:90%;border:1px solid gray; } #__debugbar_s { border-bottom:1px dotted #EFEFEF;background:#FFF;width:100%;font-size:11px;position: fixed; top:0px; left:5px; } #__debugbar_s a { color:blue; } #__debugbar_s a.a { border-bottom: 1px dotted gray; } #__debug_c_1 ol { margin-left: 20px; padding: 0px; } #__debug_c_4_nav { background:#FFF; border:1px solid black; border-top:none; padding:5px; position: fixed; top:0px; right:0px } </style></head><body>'. '<div id="__debugbarwrap__">'. '<div id="__debugbar_s">Discuz! '.DISCUZ_VERSION.' '.DISCUZ_RELEASE.''.$svn.' / php:'.PHP_VERSION.' <span id="__debug_b"></span><br />'. $m.'Queries <s>'.$queries.$sqlw.($_G['debuginfo']['time'] ? ' in '.$_G['debuginfo']['time'].'s' : '').'</s> / Include files <s>'.(count($includes) - 1).'</s> / ModID <s>'.$modid.'</s>'. '<br /><a name="debugbar" href="javascript:;" onclick="parent.scrollTo(0,0)" style="float:right">[TOP] </a>'. '<img src="../static/image/common/arw_r.gif" /><a id="__debug_1" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'800px\';switchTab(\'__debug\', 1, '.$max.')">Queries</a>'. '<img src="../static/image/common/arw_r.gif" /><a id="__debug_4" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'800px\';switchTab(\'__debug\', 4, '.$max.');sqldebug_ajax.location.href = sqldebug_ajax.location.href;">Ajax Queries</a>'. '<img src="../static/image/common/arw_r.gif" /><a id="__debug_2" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'300px\';switchTab(\'__debug\', 2, '.$max.')">Envionment</a>'. '<img src="../static/image/common/arw_r.gif" /><a id="__debug_3" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'500px\';switchTab(\'__debug\', 3, '.$max.')">Include Files</a>'. '<img src="../static/image/common/arw_r.gif" /><a id="__debug_5" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'300px\';switchTab(\'__debug\', 5, '.$max.')">$_COOKIE</a>'. ($_G['adminid'] == 1 ? '<img src="../static/image/common/arw_r.gif" /><a id="__debug_6" href="#debugbar" onclick="parent.$(\'_debug_iframe\').height=\'1000px\';switchTab(\'__debug\', 6, 6)">$_G</a>' : ''). ($_G['adminid'] == 1 ? '<img src="../static/image/common/arw_r.gif" /><a href="'.$debugfile.'?k='.$akey.'&'.$phpinfok.'" target="_blank">phpinfo()</a>'. '<img src="../static/image/common/arw_r.gif" /><a href="'.$debugfile.'?k='.$akey.'&'.$mysqlplek.'" target="_blank">MySQL Processlist</a>'. '<img src="../static/image/common/arw_r.gif" /><a href="'.$debugfile.'?k='.$akey.'&'.$viewcachek.'" target="_blank">View Cache</a>'. '<img src="../static/image/common/arw_r.gif" /><a href="../misc.php?mod=initsys" target="_debug_initframe" onclick="parent.$(\'_debug_initframe\').onload = function () {parent.location.href=parent.location.href;}">Update Cache</a>' : ''). ' | '. '<img src="../static/image/common/arw_r.gif" /><a href="../install/update.php" target="_blank">update.php</a>'. ($_G['setting']['connect']['allow'] ? '<img src="../static/image/common/arw_r.gif" /><a onclick="var _q_ = prompt(\'QQ Number\');if(_q_) {window.open(this.href + \'&qq=\' + _q_);}return false;" href="../../source/function/function_debug.php?debugaction=connect&redirect_url='.rawurlencode($_G['connect']['redirect_url']).'" target="_top">QQ Login</a>' : ''). '</div>'. '<div id="__debugbar__" style="clear:both">'. '<div id="__debug_c_1" style="display:none"><b>Queries: </b> '.$queries.'<ol>'; $debug .= $sqldebug.''; $debug .= '</ol></div>'. '<div id="__debug_c_4" style="display:none"><iframe id="sqldebug_ajax" name="sqldebug_ajax" src="../'.$ajaxhtml.'?k='.$akey.'" frameborder="0" width="100%" height="800"></iframe></div>'. '<div id="__debug_c_2" style="display:none"><b>SERVER: </b>'.PHP_OS.', '.$_SERVER['SERVER_SOFTWARE'].', '.php_sapi_name().'<br /><b>PHP: </b>'.PHP_VERSION.'<br /><b>MySQL: </b>'.DB::result_first("SELECT VERSION()").'<br /><b>IP: </b>'.$_G['clientip'].'<br /><b>UA: </b>'.$_SERVER['HTTP_USER_AGENT'].'<br /><b>BROWSER.x: </b><script>for(BROWSERi in BROWSER) {var __s=BROWSERi+\':\'+BROWSER[BROWSERi]+\' \';$(\'__debug_b\').innerHTML+=BROWSER[BROWSERi]!==0?__s:\'\';document.write(__s);}</script></div>'. '<div id="__debug_c_3" style="display:none"><ol>'; foreach ($includes as $fn) { $debug .= '<li>'.$fn.'</li>'; } $debug .= '<ol></div><div id="__debug_c_5" style="display:none"><ol>'; foreach($_COOKIE as $k => $v) { if(strexists($k, $_G['config']['cookie']['cookiepre'])) { $k = '<font color=blue>'.$k.'</font>'; } $debug .= "<li><br />['$k'] => ".htmlspecialchars($v)."</li>"; } $debug .= '</ol></div><div id="__debug_c_6" style="display:none">'. '<div id="__debug_c_4_nav"><a href="#S_config">Nav:<br /> <a href="#top">#top</a><br /> <a href="#S_config">$_G[\'config\']</a><br /> <a href="#S_setting">$_G[\'setting\']</a><br /> <a href="#S_member">$_G[\'member\']</a><br /> <a href="#S_group">$_G[\'group\']</a><br /> <a href="#S_cookie">$_G[\'cookie\']</a><br /> <a href="#S_style">$_G[\'style\']</a><br /> <a href="#S_cache">$_G[\'cache\']</a><br /> </div>'. '<ol><a name="top"></a>'.$_GS.$_GA.'</ol></div></body></html>'; $fn = 'data/'.$debugfile; file_put_contents(DISCUZ_ROOT.'./'.$fn, $debug); echo '<iframe src="'.$fn.'?k='.$akey.'" name="_debug_iframe" id="_debug_iframe" style="border-top:1px solid gray;overflow-x:hidden;overflow-y:auto" width="100%" height="70" frameborder="0"></iframe><div id="_debug_div"></div><iframe name="_debug_initframe" id="_debug_initframe" style="display:none"></iframe>'; } ?>
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