discuz缓存应用详解.

元首 · 发表于 2009-12-7 09:34:00

example.php 测试文件解释

<?php
require_once './include/common.inc.php';
require_once './include/cache.func.php';
//参数说明: 缓存标识名, 内置数据取得标识, 缓存数据(string), 缓存前缀.
//writetocache('文件名', $cachenames, $cachedata = '', $prefix = 'cache_')
// 第一种模式. 指针转成变量,写入到test.php当中, 目录在forundata/cache/
writetocache('test','',getcachevars(array('var'=>'变量值','phps'=>'discuz.net')), $prefix = 'caches_');
//第二种模式,这种比较好, 生成一个数组, 写在文件test2.php中.
writetocache('test2', '', '$_DCACHE[\'settings\'] = '.arrayeval(range(1,20)).";\n\n", $prefix = 'caches_');
//第三种模式,$cachedata内容是什么, 就写入是什么, 很强悍.
writetocache('test3', '',"array('var1'=>'mysql php','var2'=>'fenanr')", $prefix = 'caches_');
//第四种模式,当没有$prefix值时, 默认生成cache_xxxx.php的缓存命名.
writetocache('test4', '',"array('var1'=>'php 6','var2'=>'discuz')");
?>

复制代码

总结:
为了支撑高压力及访问量下的程序动作正常, discuz的缓存结构写得非常复杂. 当然, 不同的人思考方式不相同.
这次用了几个常用例子讲解缓存系统的应用, 希望可以帮助到需要的朋友.
由于限制了字节, 所以函数解释放二楼.

元首 · 发表于 2009-12-7 09:36:17

cache.func.php文件详解

<?php
/*
[Discuz!] (C)2001-2009 Comsenz Inc.
This is NOT a freeware, use is subject to license terms
$Id: cache.func.php 21311 2009-11-26 01:35:43Z liulanbo $
*/
define('DISCUZ_KERNEL_VERSION', '7.2');
define('DISCUZ_KERNEL_RELEASE', '20091126');
function updatecache($cachename = '') {
//分别引入 mysql操作库存,论坛名称,数据库前缀,最大论坛时间(估计是授权用户专用)
global $db, $bbname, $tablepre, $maxbdays;
//静态化一下数组,比如$cachename = setings 就读到这个数组 'settings' => array('settings'),
static $cachescript = array
(
'settings' => array('settings'),
'forums' => array('forums'),
'icons' => array('icons'),
'stamps' => array('stamps'),
'ranks' => array('ranks'),
'usergroups' => array('usergroups'),
'request' => array('request'),
'medals' => array('medals'),
'magics' => array('magics'),
'topicadmin' => array('modreasons', 'stamptypeid'),
'archiver' => array('advs_archiver'),
'register' => array('advs_register', 'ipctrl'),
'faqs' => array('faqs'),
'secqaa' => array('secqaa'),
'censor' => array('censor'),
'ipbanned' => array('ipbanned'),
'smilies' => array('smilies_js'),
'forumstick' => array('forumstick'),
'index' => array('announcements', 'onlinelist', 'forumlinks', 'advs_index', 'heats'),
'forumdisplay' => array('smilies', 'announcements_forum', 'globalstick', 'forums', 'icons', 'onlinelist', 'advs_forumdisplay', 'forumstick'),
'viewthread' => array('smilies', 'smileytypes', 'forums', 'usergroups', 'ranks', 'stamps', 'bbcodes', 'smilies', 'advs_viewthread', 'tags_viewthread', 'custominfo', 'groupicon', 'focus', 'stamps'),
'post' => array('bbcodes_display', 'bbcodes', 'smileycodes', 'smilies', 'smileytypes', 'icons', 'domainwhitelist'),
'profilefields' => array('fields_required', 'fields_optional'),
'viewpro' => array('fields_required', 'fields_optional', 'custominfo'),
'bbcodes' => array('bbcodes', 'smilies', 'smileytypes'),
);
//当最大时间有值时,就将在$cachescript 增加两段
if($maxbdays) {
$cachescript['birthdays'] = array('birthdays');
$cachescript['index'][] = 'birthdays_index';
}
// 组成更新数组.
$updatelist = empty($cachename) ? array_values($cachescript) : (is_array($cachename) ? array('0' => $cachename) : array(array('0' => $cachename)));
$updated = array();
// 现在循环. 由于是二维数组, 所以循环两次.
foreach($updatelist as $value) {
foreach($value as $cname) {
//判断如果$updated数组为假,或者$updated中没有$cname的值,就进入, 目的是为了防止重复
if(empty($updated) || !in_array($cname, $updated)) {
$updated[] = $cname; //进来一次, 就丢进数组, 以便循环中再次使用.
getcachearray($cname); // 取得相应的值,并且生成缓存.
}
}
}
// 假如是空参数进入, 就对所有的缓存标识作判断.
foreach($cachescript as $script => $cachenames) {
if(empty($cachename) || (!is_array($cachename) && in_array($cachename, $cachenames)) || (is_array($cachename) && array_intersect($cachename, $cachenames))) {
$cachedata = '';
$query = $db->query("SELECT data FROM {$tablepre}caches WHERE cachename in(".implodeids($cachenames).")");
while($data = $db->fetch_array($query)) {
$cachedata .= $data['data'];
}
writetocache($script, $cachenames, $cachedata);
}
}
//假如参数为空,或者参数为styles 就处理模板风格等缓存
if(!$cachename || $cachename == 'styles') {
$stylevars = $styledata = $styleicons = array();
$defaultstyleid = $db->result_first("SELECT value FROM {$tablepre}settings WHERE variable = 'styleid'");
list(, $imagemaxwidth) = explode("\t", $db->result_first("SELECT value FROM {$tablepre}settings WHERE variable = 'zoomstatus'"));
$imagemaxwidth = $imagemaxwidth ? $imagemaxwidth : 600;
$imagemaxwidthint = intval($imagemaxwidth);
$query = $db->query("SELECT sv.* FROM {$tablepre}stylevars sv LEFT JOIN {$tablepre}styles s ON s.styleid = sv.styleid AND (s.available=1 OR s.styleid='$defaultstyleid')");
while($var = $db->fetch_array($query)) {
$stylevars[$var['styleid']][$var['variable']] = $var['substitute'];
}
$query = $db->query("SELECT s.*, t.directory AS tpldir FROM {$tablepre}styles s LEFT JOIN {$tablepre}templates t ON s.templateid=t.templateid WHERE s.available=1 OR s.styleid='$defaultstyleid'");
while($data = $db->fetch_array($query)) {
$data = array_merge($data, $stylevars[$data['styleid']]);
$datanew = array();
$data['imgdir'] = $data['imgdir'] ? $data['imgdir'] : 'images/default';
$data['styleimgdir'] = $data['styleimgdir'] ? $data['styleimgdir'] : $data['imgdir'];
foreach($data as $k => $v) {
if(substr($k, -7, 7) == 'bgcolor') {
$newkey = substr($k, 0, -7).'bgcode';
$datanew[$newkey] = setcssbackground($data, $k);
}
}
$data = array_merge($data, $datanew);
$styleicons[$data['styleid']] = $data['menuhover'];
if(strstr($data['boardimg'], ',')) {
$flash = explode(",", $data['boardimg']);
$flash[0] = trim($flash[0]);
$flash[0] = preg_match('/^http:\/\//i', $flash[0]) ? $flash[0] : $data['styleimgdir'].'/'.$flash[0];
$data['boardlogo'] = "<embed src="".$flash[0]."" width="".trim($flash[1])."" height="".trim($flash[2])."" type="application/x-shockwave-flash" wmode="transparent"></embed>";
} else {
$data['boardimg'] = preg_match('/^http:\/\//i', $data['boardimg']) ? $data['boardimg'] : $data['styleimgdir'].'/'.$data['boardimg'];
$data['boardlogo'] = "<img src="$data[boardimg]" alt="$bbname" border="0" />";
}
$data['bold'] = $data['nobold'] ? 'normal' : 'bold';
$contentwidthint = intval($data['contentwidth']);
$contentwidthint = $contentwidthint ? $contentwidthint : 600;
if(substr(trim($data['contentwidth']), -1, 1) != '%') {
if(substr(trim($imagemaxwidth), -1, 1) != '%') {
$data['imagemaxwidth'] = $imagemaxwidthint > $contentwidthint ? $contentwidthint : $imagemaxwidthint;
} else {
$data['imagemaxwidth'] = intval($contentwidthint * $imagemaxwidthint / 100);
}
} else {
if(substr(trim($imagemaxwidth), -1, 1) != '%') {
$data['imagemaxwidth'] = '%'.$imagemaxwidthint;
} else {
$data['imagemaxwidth'] = ($imagemaxwidthint > $contentwidthint ? $contentwidthint : $imagemaxwidthint).'%';
}
}
$data['verhash'] = random(3);
$styledata[] = $data;
}
foreach($styledata as $data) {
$data['styleicons'] = $styleicons;
writetocache($data['styleid'], '', getcachevars($data, 'CONST'), 'style_');
writetocsscache($data);
}
}
//假如参数为空,或者参数为usergroups 就处理用户组等缓存
if(!$cachename || $cachename == 'usergroups') {
@include_once DISCUZ_ROOT.'forumdata/cache/cache_settings.php';
$threadplugins = !isset($_DCACHE['settings']) ? $GLOBALS['threadplugins'] : $_DCACHE['settings'];
$allowthreadplugin = $threadplugins ? unserialize($db->result_first("SELECT value FROM {$tablepre}settings WHERE variable='allowthreadplugin'")) : array();
$query = $db->query("SELECT * FROM {$tablepre}usergroups u
LEFT JOIN {$tablepre}admingroups a ON u.groupid=a.admingid");
while($data = $db->fetch_array($query)) {
$ratearray = array();
if($data['raterange']) {
foreach(explode("\n", $data['raterange']) as $rating) {
$rating = explode("\t", $rating);
$ratearray[$rating[0]] = array('min' => $rating[1], 'max' => $rating[2], 'mrpd' => $rating[3]);
}
}
$data['raterange'] = $ratearray;
$data['grouptitle'] = $data['color'] ? '<font color="'.$data['color'].'">'.$data['grouptitle'].'</font>' : $data['grouptitle'];
$data['grouptype'] = $data['type'];
$data['grouppublic'] = $data['system'] != 'private';
$data['groupcreditshigher'] = $data['creditshigher'];
$data['groupcreditslower'] = $data['creditslower'];
$data['allowthreadplugin'] = $threadplugins ? $allowthreadplugin[$data['groupid']] : array();
unset($data['type'], $data['system'], $data['creditshigher'], $data['creditslower'], $data['color'], $data['groupavatar'], $data['admingid']);
writetocache($data['groupid'], '', getcachevars($data), 'usergroup_');
}
}
//假如参数为空,或者参数为admingroups 就处理管理用户组等缓存
if(!$cachename || $cachename == 'admingroups') {
$query = $db->query("SELECT * FROM {$tablepre}admingroups");
while($data = $db->fetch_array($query)) {
writetocache($data['admingid'], '', getcachevars($data), 'admingroup_');
}
}
if(!$cachename || $cachename == 'plugins') {
$query = $db->query("SELECT pluginid, available, adminid, name, identifier, datatables, directory, copyright, modules FROM {$tablepre}plugins");
while($plugin = $db->fetch_array($query)) {
$data = array_merge($plugin, array('modules' => array()), array('vars' => array()));
$plugin['modules'] = unserialize($plugin['modules']);
if(is_array($plugin['modules'])) {
foreach($plugin['modules'] as $module) {
$data['modules'][$module['name']] = $module;
}
}
$queryvars = $db->query("SELECT variable, value FROM {$tablepre}pluginvars WHERE pluginid='$plugin[pluginid]'");
while($var = $db->fetch_array($queryvars)) {
$data['vars'][$var['variable']] = $var['value'];
}
writetocache($plugin['identifier'], '', "\$_DPLUGIN['$plugin[identifier]'] = ".arrayeval($data), 'plugin_');
}
}
//假如参数为空,或者参数为threadsorts 就处理主题信息等缓存
if(!$cachename || $cachename == 'threadsorts') {
$sortlist = $templatedata = array();
$query = $db->query("SELECT t.typeid AS sortid, tt.optionid, tt.title, tt.type, tt.unit, tt.rules, tt.identifier, tt.description, tv.required, tv.unchangeable, tv.search, tv.subjectshow
FROM {$tablepre}threadtypes t
LEFT JOIN {$tablepre}typevars tv ON t.typeid=tv.sortid
LEFT JOIN {$tablepre}typeoptions tt ON tv.optionid=tt.optionid
WHERE t.special='1' AND tv.available='1'
ORDER BY tv.displayorder");
while($data = $db->fetch_array($query)) {
$data['rules'] = unserialize($data['rules']);
$sortid = $data['sortid'];
$optionid = $data['optionid'];
$sortlist[$sortid][$optionid] = array(
'title' => dhtmlspecialchars($data['title']),
'type' => dhtmlspecialchars($data['type']),
'unit' => dhtmlspecialchars($data['unit']),
'identifier' => dhtmlspecialchars($data['identifier']),
'description' => dhtmlspecialchars($data['description']),
'required' => intval($data['required']),
'unchangeable' => intval($data['unchangeable']),
'search' => intval($data['search']),
'subjectshow' => intval($data['subjectshow']),
);
if(in_array($data['type'], array('select', 'checkbox', 'radio'))) {
if($data['rules']['choices']) {
$choices = array();
foreach(explode("\n", $data['rules']['choices']) as $item) {
list($index, $choice) = explode('=', $item);
$choices[trim($index)] = trim($choice);
}
$sortlist[$sortid][$optionid]['choices'] = $choices;
} else {
$typelist[$sortid][$optionid]['choices'] = array();
}
} elseif(in_array($data['type'], array('text', 'textarea'))) {
$sortlist[$sortid][$optionid]['maxlength'] = intval($data['rules']['maxlength']);
} elseif($data['type'] == 'image') {
$sortlist[$sortid][$optionid]['maxwidth'] = intval($data['rules']['maxwidth']);
$sortlist[$sortid][$optionid]['maxheight'] = intval($data['rules']['maxheight']);
} elseif($data['type'] == 'number') {
$sortlist[$sortid][$optionid]['maxnum'] = intval($data['rules']['maxnum']);
$sortlist[$sortid][$optionid]['minnum'] = intval($data['rules']['minnum']);
}
}
$query = $db->query("SELECT typeid, description, template, stemplate FROM {$tablepre}threadtypes WHERE special='1'");
while($data = $db->fetch_array($query)) {
$templatedata[$data['typeid']] = $data['template'];
$stemplatedata[$data['typeid']] = $data['stemplate'];
$threaddesc[$data['typeid']] = dhtmlspecialchars($data['description']);
}
foreach($sortlist as $sortid => $option) {
writetocache($sortid, '', "\$_DTYPE = ".arrayeval($option).";\n\n\$_DTYPETEMPLATE = "".str_replace('"', '"', $templatedata[$sortid])."";\n\n\$_DSTYPETEMPLATE = "".str_replace('"', '"', $stemplatedata[$sortid])."";\n", 'threadsort_');
}
}
}
// 这是css缓存文件生成需要的处理css背景颜色函数
function setcssbackground(&$data, $code) {
$codes = explode(' ', $data[$code]);
$css = $codevalue = '';
for($i = 0; $i < count($codes); $i++) {
if($i < 2) {
if($codes[$i] != '') {
if($codes[$i]{0} == '#') {
$css .= strtoupper($codes[$i]).' ';
$codevalue = strtoupper($codes[$i]);
} elseif(preg_match('/^http:\/\//i', $codes[$i])) {
$css .= 'url("'.$codes[$i].'") ';
} else {
$css .= 'url("'.$data['styleimgdir'].'/'.$codes[$i].'") ';
}
}
} else {
$css .= $codes[$i].' ';
}
}
$data[$code] = $codevalue;
$css = trim($css);
return $css ? 'background: '.$css : '';
}
// 更新系统配置缓存
function updatesettings() {
global $_DCACHE;
if(isset($_DCACHE['settings']) && is_array($_DCACHE['settings'])) {
writetocache('settings', '', '$_DCACHE[\'settings\'] = '.arrayeval($_DCACHE['settings']).";\n\n");
}
}
// 写入缓存文件, 详解一下.
function writetocache($script, $cachenames, $cachedata = '', $prefix = 'cache_') {
global $authkey;
//假如$cachenames是数组,并且$cachedata为假
if(is_array($cachenames) && !$cachedata) {
foreach($cachenames as $name) {
//赋予内置函数的指定标识, 即可有数据返回
$cachedata .= getcachearray($name, $script);
}
}
$dir = DISCUZ_ROOT.'./forumdata/cache/';
//如果缓存目录不存在, 就生成一个.
if(!is_dir($dir)) {
@mkdir($dir, 0777);
}
if($fp = @fopen("$dir$prefix$script.php", 'wb')) {
fwrite($fp, "<?php\n//Discuz! cache file, DO NOT modify me!".
"\n//Created: ".date("M j, Y, G:i").
"\n//Identify: ".md5($prefix.$script.'.php'.$cachedata.$authkey)."\n\n$cachedata?>");
fclose($fp);
} else {
exit('Can not write to cache files, please check directory ./forumdata/ and ./forumdata/cache/ .');
}
}
// 更新css缓存生成过程中, 里面的路径问题, 参数为css.htm的内容.
function writetocsscache($data) {
$cssdata = '';
foreach(array('_common' => array('css_common', 'css_append'),
'_special' => array('css_special', 'css_special_append'),
'_wysiwyg' => array('css_wysiwyg', '_wysiwyg_append'),
'_seditor' => array('css_seditor', 'css_seditor_append'),
'_calendar' => array('css_calendar', 'css_calendar_append'),
'_moderator' => array('css_moderator', 'css_moderator_append'),
'_script' => array('css_script', 'css_script_append'),
'_task_newbie' => array('css_task_newbie', 'css_task_newbie_append')
) as $extra => $cssfiles) {
$cssdata = '';
foreach($cssfiles as $css) {
$cssfile = DISCUZ_ROOT.'./'.$data['tpldir'].'/'.$css.'.htm';
!file_exists($cssfile) && $cssfile = DISCUZ_ROOT.'./templates/default/'.$css.'.htm';
if(file_exists($cssfile)) {
$fp = fopen($cssfile, 'r');
$cssdata .= @fread($fp, filesize($cssfile))."\n\n";
fclose($fp);
}
}
$cssdata = preg_replace("/\{([A-Z0-9]+)\}/e", '\$data[strtolower(\'\1\')]', $cssdata);
$cssdata = preg_replace("/<\?.+?\?>\s*/", '', $cssdata);
$cssdata = !preg_match('/^http:\/\//i', $data['styleimgdir']) ? str_replace("url("$data[styleimgdir]", "url("../../$data[styleimgdir]", $cssdata) : $cssdata;
$cssdata = !preg_match('/^http:\/\//i', $data['styleimgdir']) ? str_replace("url($data[styleimgdir]", "url(../../$data[styleimgdir]", $cssdata) : $cssdata;
$cssdata = !preg_match('/^http:\/\//i', $data['imgdir']) ? str_replace("url("$data[imgdir]", "url("../../$data[imgdir]", $cssdata) : $cssdata;
$cssdata = !preg_match('/^http:\/\//i', $data['imgdir']) ? str_replace("url($data[imgdir]", "url(../../$data[imgdir]", $cssdata) : $cssdata;
if($extra != '_script') {
$cssdata = preg_replace(array('/\s*([,;:\{\}])\s*/', '/[\t\n\r]/', '/\/\*.+?\*\//'), array('\\1', '',''), $cssdata);
}
if(@$fp = fopen(DISCUZ_ROOT.'./forumdata/cache/style_'.$data['styleid'].$extra.'.css', 'w')) {
fwrite($fp, $cssdata);
fclose($fp);
} else {
exit('Can not write to cache files, please check directory ./forumdata/ and ./forumdata/cache/ .');
}
}
}
// 将js文件复制到缓存目录.
function writetojscache() {
$dir = DISCUZ_ROOT.'include/js/';
$dh = opendir($dir);
$remove = array(
'/(^|\r|\n)\/\*.+?(\r|\n)\*\/(\r|\n)/is',
'/\/\/note.+?(\r|\n)/i',
'/\/\/debug.+?(\r|\n)/i',
'/(^|\r|\n)(\s|\t)+/',
'/(\r|\n)/',
);
while(($entry = readdir($dh)) !== false) {
if(fileext($entry) == 'js') {
$jsfile = $dir.$entry;
$fp = fopen($jsfile, 'r');
$jsdata = @fread($fp, filesize($jsfile));
fclose($fp);
$jsdata = preg_replace($remove, '', $jsdata);
if(@$fp = fopen(DISCUZ_ROOT.'./forumdata/cache/'.$entry, 'w')) {
fwrite($fp, $jsdata);
fclose($fp);
} else {
exit('Can not write to cache files, please check directory ./forumdata/ and ./forumdata/cache/ .');
}
}
}
}
//取得缓存数组, 内置. 标识名,及文件名.
function getcachearray($cachename, $script = '') {
global $db, $timestamp, $tablepre, $timeoffset, $maxbdays, $smcols, $smrows, $charset, $scriptlang;
//省略上千代码.
}
//组成缓存文件需要的数据数组.
function getcachevars($data, $type = 'VAR') {
$evaluate = '';
foreach($data as $key => $val) {
if(!preg_match("/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/", $key)) {
continue;
}
if(is_array($val)) {
$evaluate .= "\$$key = ".arrayeval($val).";\n";
} else {
$val = addcslashes($val, '\'\\');
$evaluate .= $type == 'VAR' ? "\$$key = '$val';\n" : "define('".strtoupper($key)."', '$val');\n";
}
}
return $evaluate;
}
//取得广告设置的内容数组.
function advertisement($range) {
global $db, $tablepre, $timestamp;
$advs = array();
$query = $db->query("SELECT * FROM {$tablepre}advertisements WHERE available>'0' AND starttime<='$timestamp' ORDER BY displayorder");
if($db->num_rows($query)) {
while($adv = $db->fetch_array($query)) {
if(in_array($adv['type'], array('footerbanner', 'thread'))) {
$parameters = unserialize($adv['parameters']);
$position = isset($parameters['position']) && in_array($parameters['position'], array(2, 3)) ? $parameters['position'] : 1;
$type = $adv['type'].$position;
} else {
$type = $adv['type'];
}
$adv['targets'] = in_array($adv['targets'], array('', 'all')) ? ($type == 'text' ? 'forum' : (substr($type, 0, 6) == 'thread' ? 'forum' : 'all')) : $adv['targets'];
foreach(explode("\t", $adv['targets']) as $target) {
if($range == 'index' && substr($target, 0, 3) == 'gid') {
$advs['cat'][$type][substr($target, 3)][] = $adv['advid'];
$advs['items'][$adv['advid']] = $adv['code'];
}
$target = $target == '0' || $type == 'intercat' ? 'index' : (in_array($target, array('all', 'index', 'forumdisplay', 'viewthread', 'register', 'redirect', 'archiver')) ? $target : ($target == 'forum' ? 'forum_all' : 'forum_'.$target));
if((($range == 'forumdisplay' && !in_array($adv['type'], array('thread', 'interthread'))) || $range == 'viewthread') && substr($target, 0, 6) == 'forum_') {
if($adv['type'] == 'thread') {
foreach(isset($parameters['displayorder']) ? explode("\t", $parameters['displayorder']) : array('0') as $postcount) {
$advs['type'][$type.'_'.$postcount][$target][] = $adv['advid'];
}
} else {
$advs['type'][$type][$target][] = $adv['advid'];
}
$advs['items'][$adv['advid']] = $adv['code'];
} elseif($range == 'all' && in_array($target, array('all', 'redirect'))) {
$advs[$target]['type'][$type][] = $adv['advid'];
$advs[$target]['items'][$adv['advid']] = $adv['code'];
} elseif($range == 'index' && $type == 'intercat') {
$parameters = unserialize($adv['parameters']);
foreach(is_array($parameters['position']) ? $parameters['position'] : array('0') as $position) {
$advs['type'][$type][$position][] = $adv['advid'];
$advs['items'][$adv['advid']] = $adv['code'];
}
} elseif($target == $range || ($range == 'index' && $target == 'forum_all' && $type == 'text')) {
$advs['type'][$type][] = $adv['advid'];
$advs['items'][$adv['advid']] = $adv['code'];
}
}
}
}
return $advs;
}
// 简单判断.
function pluginmodulecmp($a, $b) {
return $a['displayorder'] > $b['displayorder'] ? 1 : -1;
}
// 计算长宽的函数
function smthumb($size, $smthumb = 50) {
if($size[0] <= $smthumb && $size[1] <= $smthumb) {
return array('w' => $size[0], 'h' => $size[1]);
}
$sm = array();
$x_ratio = $smthumb / $size[0];
$y_ratio = $smthumb / $size[1];
if(($x_ratio * $size[1]) < $smthumb) {
$sm['h'] = ceil($x_ratio * $size[1]);
$sm['w'] = $smthumb;
} else {
$sm['w'] = ceil($y_ratio * $size[0]);
$sm['h'] = $smthumb;
}
return $sm;
}
// 处理缓存生成时部分内容样式的解析
function parsehighlight($highlight) {
if($highlight) {
$colorarray = array('', 'red', 'orange', 'yellow', 'green', 'cyan', 'blue', 'purple', 'gray');
$string = sprintf('%02d', $highlight);
$stylestr = sprintf('%03b', $string[0]);
$style = ' style="';
$style .= $stylestr[0] ? 'font-weight: bold;' : '';
$style .= $stylestr[1] ? 'font-style: italic;' : '';
$style .= $stylestr[2] ? 'text-decoration: underline;' : '';
$style .= $string[1] ? 'color: '.$colorarray[$string[1]] : '';
$style .= '"';
} else {
$style = '';
}
return $style;
}
// 这就是传说的array的立体型输出.
function arrayeval($array, $level = 0) {
if(!is_array($array)) {
return "'".$array."'";
}
if(is_array($array) && function_exists('var_export')) {
return var_export($array, true);
}
$space = '';
for($i = 0; $i <= $level; $i++) {
$space .= "\t";
}
$evaluate = "Array\n$space(\n";
$comma = $space;
if(is_array($array)) {
foreach($array as $key => $val) {
$key = is_string($key) ? '\''.addcslashes($key, '\'\\').'\'' : $key;
$val = !is_array($val) && (!preg_match("/^\-?[1-9]\d*$/", $val) || strlen($val) > 12) ? '\''.addcslashes($val, '\'\\').'\'' : $val;
if(is_array($val)) {
$evaluate .= "$comma$key => ".arrayeval($val, $level + 1);
} else {
$evaluate .= "$comma$key => $val";
}
$comma = ",\n$space";
}
}
$evaluate .= "\n$space)";
return $evaluate;
}
?>

复制代码

一文天 · 发表于 2009-12-8 09:16:47

教程非常详细

sean2050 · 发表于 2009-12-14 23:19:42

支持你~这类型教程不错

abcnic18 · 发表于 2009-12-16 10:48:30

非常好！感谢

js_xiaoleme · 发表于 2010-4-8 18:15:01

好人呀！ global.func.php函数你了解吗？能分析一下吗？

wispersure · 发表于 2010-4-10 18:42:22

帅气！！！

mslxd · 发表于 2010-4-10 22:32:51

好复杂啊，真是。。。

niuniu5201314 · 发表于 2010-4-12 17:05:39

好东西，顶！

q276133913 · 发表于 2010-4-28 09:42:26

数据缓存，学习了！

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discuz缓存应用详解.

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