phpcms v9緩存文件是怎樣生成的?
這篇文章介紹phpcms的緩存結(jié)構(gòu)
我并沒有做深入的學(xué)習,但是phpcms的想法上卻是有他的過人之處,太令人折服了,這里分享phpcms緩存的一中實現(xiàn)方案
/include/cache.func.php
這里最先主要是定義了一些phpcms的緩存函數(shù),phpcms的緩存分為,表緩存,模型緩存,模型字段緩存,還有模塊緩存,首先這些都是基于表的緩存的。
最開始有一個函數(shù)
function cache_all() { @set_time_limit(600); cache_common(); cache_module(); cache_model(); cache_category(); cache_area(); cache_type(); cache_member_group(); cache_role(); cache_author(); cache_keyword(); cache_copyfrom(); cache_pos(); cache_status(); cache_workflow(); tags_update(); return TRUE; }
這個函數(shù)就調(diào)用一大堆的緩存函數(shù)來生成緩存的。
首先第一個函數(shù) cache_common
大家可以看下面的注釋,是將 前綴名_model,前綴名_category ,前綴名_ module,前綴名,前綴名_type,前綴名_area,等等寫入到$CACHE數(shù)組的對應(yīng)下表之中 (比如model 表的數(shù)據(jù)$CACHE["model"]=$arr,$arr為phpcms_model表的數(shù)據(jù))
function cache_common() { global $db; $data = array(); $result = $db->query("SELECT `module`,`name`,`path`,`url`,`iscore`,`version` FROM `".DB_PRE."module` WHERE `disabled`=0"); while($r = $db->fetch_array($result)) { if(!$r['path']) $r['path'] = $r['module'] == 'phpcms' ? '' : $r['module'].'/'; if(!$r['url']) $r['url'] = $r['module'] == 'phpcms' ? '' : $r['module'].'/'; $data[$r['module']] = $r; } $db->free_result($result); $CACHE['MODULE'] = $data; //以上是將對應(yīng)的模塊寫入$CACHE; $data = array(); $result = $db->query("SELECT * FROM `".DB_PRE."model` WHERE `disabled`=0"); while($r = $db->fetch_array($result)) { $data[$r['modelid']] = $r; } $db->free_result($result); $CACHE['MODEL'] = $data; $data = array(); //以上是對應(yīng)的 model表里的內(nèi)容寫入數(shù)組$CACHE; $result = $db->query("SELECT `catid`,`module`,`type`,`modelid`,`catname`,`style`,`image`,`catdir`,`url`,`parentid`,`arrparentid`,`parentdir`,`child`,`arrchildid`,`items`,`citems`,`pitems`,`ismenu`,`letter` FROM `".DB_PRE."category` WHERE 1 ORDER BY `listorder`,`catid`"); while($r = $db->fetch_array($result)) { $r['url'] = url($r['url']); $data[$r['catid']] = $r; } $db->free_result($result); $CACHE['CATEGORY'] = $data; //以上是將所有的欄目寫入$CACHE數(shù)組 $data = array(); $result = $db->query("SELECT `typeid`,`modelid`,`module`,`name`,`style`,`typedir`,`url` FROM `".DB_PRE."type` WHERE 1 ORDER BY `listorder`,`typeid`"); while($r = $db->fetch_array($result)) { $data[$r['typeid']] = $r; } $db->free_result($result); $CACHE['TYPE'] = $data; //以上是將所有的 類別表里的數(shù)據(jù)寫入$CACHE $data = array(); $result = $db->query("SELECT `areaid`,`name`,`style`,`parentid`,`arrparentid`,`child`,`arrchildid` FROM `".DB_PRE."area` WHERE 1 ORDER BY `listorder`,`areaid`"); while($r = $db->fetch_array($result)) { $data[$r['areaid']] = $r; } $db->free_result($result); $CACHE['AREA'] = $data; //所有的地區(qū)表寫入$CACHE; $data = array(); $result = $db->query("SELECT `urlruleid`,`urlrule` FROM `".DB_PRE."urlrule` WHERE 1 ORDER BY `urlruleid`"); while($r = $db->fetch_array($result)) { $data[$r['urlruleid']] = $r['urlrule']; } $db->free_result($result); $CACHE['URLRULE'] = $data; //將所有的url規(guī)則寫入緩存 $data = array(); $r = $db->get_one("SELECT `setting` FROM `".DB_PRE."module` WHERE `module`='phpcms'"); $setting = $r['setting']; eval("\$PHPCMS = $setting;"); if($PHPCMS['siteurl'] =='') $PHPCMS['siteurl'] = SITE_URL; $CACHE['PHPCMS'] = $PHPCMS; //最后調(diào)用cache_write方法將所有的數(shù)組寫入common.php 位置/date/cache/common.php根據(jù)系統(tǒng)變量慧有所改動 cache_write('common.php', $CACHE); return $CACHE; }
phpcms表緩存的實現(xiàn)方式主要是:利用一個叫cache_table函數(shù)$table是要緩存的表名,$fileds 是查詢的字段名字,默認為 ' * ',$where sql語句中的where 子句,$order 排序, $isline是否開啟字段緩存默認為不開啟,如果開啟表字段緩存和表緩存將同時進行
function cache_table($table, $fields = '*', $valfield = '', $where = '', $order = '', $iscacheline = 0, $number = 0) { global $db; $keyfield = $db->get_primary($table); $data = array(); if($where) $where = " WHERE $where"; if(!$order) $order = $keyfield; $limit = $number ? "LIMIT 0,$number" : ''; $result = $db->query("SELECT $fields FROM `$table` $where ORDER BY $order $limit"); $table = preg_replace("/^".DB_PRE."(.*)$/", "", $table); while($r = $db->fetch_array($result)) { if(isset($r['setting']) && !empty($r['setting'])) { $setting = $r['setting']; eval("\$setting = $setting;"); unset($r['setting']); if(is_array($setting)) $r = array_merge($r, $setting); } $key = $r[$keyfield]; $value = $valfield ? $r[$valfield] : $r; $data[$key] = $value; if($iscacheline) cache_write($table.'_'.$key.'.php', $value); //表字段緩存 } $db->free_result($result); cache_write($table.'.php', $data) ;// 表緩存 }
將數(shù)據(jù)數(shù)組寫入對應(yīng)的緩存文件,以上這個函數(shù)就是判斷下常量CACHE_PATH是否存在默認是data/cache的路徑然后用file_put_contents 將緩存的數(shù)據(jù)寫入到對應(yīng)的cachefile中
function cache_write($file, $array, $path = '') { if(!is_array($array)) return false; $array = "<?php\nreturn ".var_export($array, true).";\n?>"; $cachefile = ($path ? $path : CACHE_PATH).$file; $strlen = file_put_contents($cachefile, $array); @chmod($cachefile, 0777); return $strlen; }
至于其他的可以參照以上的方法進行添加,大家可以查查看對應(yīng)的cache.func.php
//緩存模型表 function cache_model() { cache_table(DB_PRE.'model', '*', '', '', 'modelid', 1); } //緩存分類表生成文件路徑是../data/cachecategory_catid.php function cache_category() { cache_table(DB_PRE.'category', '*', '', '', 'listorder,catid', 1); }
緩存類別表生成路徑
../data/cache/type_typeid.php function cache_type() { cache_table(DB_PRE.'type', '*', '', '', 'listorder,typeid', 1); } //緩存地區(qū)列表
生成路徑:../data/cache/area_areaid.php
function cache_area() { cache_table(DB_PRE.'area', '*', '', '', 'listorder,areaid', 1); } //緩存用戶組表 //生成路徑:../data/cache member_grounp_group_id.php function cache_member_group() { cache_table(DB_PRE.'member_group', '*', '', '', 'groupid', 1); cache_table(DB_PRE.'member_group', '*', 'name', '', 'groupid', 0); } //緩存角色表 //生成路徑:../data/cache/role_roleid.php function cache_role() { cache_table(DB_PRE.'role', '*', 'name', '', 'listorder,roleid'); } //緩存作者表 //生成路徑:../data/cache/author_authorid.php function cache_author() { cache_table(DB_PRE.'author', '*', 'name', '', 'listorder,authorid', 0, 100); } function cache_keyword() { cache_table(DB_PRE.'keyword', '*', 'tag', '', 'listorder,usetimes', 0, 100); } function cache_copyfrom() { cache_table(DB_PRE.'copyfrom', '*', '', '', 'listorder,usetimes', 0, 100); } function cache_pos() { cache_table(DB_PRE.'position', '*', 'name', '', 'listorder,posid', 0); }
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