PHPCMS
一、模版引擎
如:调用单页面index.php?m=content&c=index&a=lists&catid=9.
1.先获取到模版变量的值$template_list="list";然后通过$type!=0来判断是单页面,
然后通过$template = $setting['page_template'] ? $setting['page_template'] : 'page';获取单页免的模版page.html.
2.引入模版include template('content',$template);
3.查看template()函数:定义在/phpcms/libs/functions/global.func.php.
template($module = 'content', $template = 'index', $style = '');
传入的三个参数分别是:
(1)module;
(2)模版,比如单页面page.html;
(3)模版风格,就是/phpcms/templates/下面的目录名,比如default,che.
该函数实现的功能:
(1)通过file_exists($compiledtplfile):判断模版编译文件是否存在;
(2)通过filemtime()判断模版文件的生成时间是否大于模版编译文件;
以上两点如果(||连接)为真,则通过$template_cache->template_compile($module, $template, $style);编译模版文件;
4.查看template_compile()函数:定义在/phpcms/libs/classes/template_cache.class.php.
template_compile($module, $template, $style = 'default');
传入的三个参数分别是:
(同上)
该函数实现的功能:
(1)通过$content = @file_get_contents ( $tplfile );读取模版源文件的内容;
(2)通过$content = $this->template_parse($content);正则匹配替换掉标签,将标签替换为php代码:
(3)通过$strlen = file_put_contents ( $compiledtplfile, $content );将替换后的字符串写入模版编译文件;
(4)返回$strlen,即用include template('content',$template);将$strlen引入到控制器代码里。其本质就是php和html代码混编。
5.模版解析:通过template_parse($str)用正则替换标签。
/** * 解析模板 * * @param $str 模板内容 * @return ture */ public function template_parse($str) { $str = preg_replace ( "/\{template\s+(.+)\}/", "<?php include template(\\1); ?>", $str ); $str = preg_replace ( "/\{include\s+(.+)\}/", "<?php include \\1; ?>", $str ); $str = preg_replace ( "/\{php\s+(.+)\}/", "<?php \\1?>", $str ); $str = preg_replace ( "/\{if\s+(.+?)\}/", "<?php if(\\1) { ?>", $str ); $str = preg_replace ( "/\{else\}/", "<?php } else { ?>", $str ); $str = preg_replace ( "/\{elseif\s+(.+?)\}/", "<?php } elseif (\\1) { ?>", $str ); $str = preg_replace ( "/\{\/if\}/", "<?php } ?>", $str ); //for 循环 $str = preg_replace("/\{for\s+(.+?)\}/","<?php for(\\1) { ?>",$str); $str = preg_replace("/\{\/for\}/","<?php } ?>",$str); //++ -- $str = preg_replace("/\{\+\+(.+?)\}/","<?php ++\\1; ?>",$str); $str = preg_replace("/\{\-\-(.+?)\}/","<?php ++\\1; ?>",$str); $str = preg_replace("/\{(.+?)\+\+\}/","<?php \\1++; ?>",$str); $str = preg_replace("/\{(.+?)\-\-\}/","<?php \\1--; ?>",$str); $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\}/", "<?php \$n=1;if(is_array(\\1)) foreach(\\1 AS \\2) { ?>", $str ); $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\s+(\S+)\}/", "<?php \$n=1; if(is_array(\\1)) foreach(\\1 AS \\2 => \\3) { ?>", $str ); $str = preg_replace ( "/\{\/loop\}/", "<?php \$n++;}unset(\$n); ?>", $str ); $str = preg_replace ( "/\{([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/", "<?php echo \\1;?>", $str ); $str = preg_replace ( "/\{\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/", "<?php echo \\1;?>", $str ); $str = preg_replace ( "/\{(\\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/", "<?php echo \\1;?>", $str ); $str = preg_replace("/\{(\\$[a-zA-Z0-9_\[\]\'\"\$\x7f-\xff]+)\}/es", "\$this->addquote('<?php echo \\1;?>')",$str); $str = preg_replace ( "/\{([A-Z_\x7f-\xff][A-Z0-9_\x7f-\xff]*)\}/s", "<?php echo \\1;?>", $str ); $str = preg_replace("/\{pc:(\w+)\s+([^}]+)\}/ie", "self::pc_tag('$1','$2', '$0')", $str); $str = preg_replace("/\{\/pc\}/ie", "self::end_pc_tag()", $str); $str = "<?php defined('IN_PHPCMS') or exit('No permission resources.'); ?>" . $str; return $str; }
关键点:1.\s 空格匹配的使用;
2.\1 \2分组的使用;
3.替换为self::pc_tag函数的使用。
二、框架实现思路(参考:http://www.tuicool.com/articles/BvU3i2v)
通过单一入口的pc_base::create_app()来创建一个应用,调用不同的类库处理不同的应用;
当处理application时:调用框架类库文件下的application.class.php文件,执行构造函数,加载param路由类,使用路由类中的$param->route_m(),$param->route_c(),$param->route_a()获取模块和控制器以及方法,route_m为模块,在modules文件下,然后是控制器和方法,标准的mvc结构。然后执行int函数,执行load_controller加载获取到的控制器并且实例化!
三、外部引用来调用phpcms的类库
include_once '../phpcms/base.php';//引入主文件 pc_base::load_sys_class('model', '', 0);//加载model类 class Api extends model {//继承model类,即调用model的各种数据库方法 public function __construct() { $this->db_config = include "../config/database.php";//此处得包含进数据库配置文件 $this->db_setting = 'default'; //$this->table_name = 'admin'; parent::__construct(); } } $apiDb = new Api(); $adpos = isset($_GET['adpos'])&&!empty($_GET['adpos'])?$_GET['adpos']:"0"; if($adpos=="login"){ $spaceid = 25; }elseif ($adpos=="register"){ $spaceid = 23; }else{ $spaceid = 0; } $sql = "SELECT s.width,s.height,p.setting FROM `u8_poster_space` s LEFT JOIN `u8_poster` p ON s.spaceid=p.spaceid WHERE p.spaceid=$spaceid"; $res = $apiDb->db->get_ones($sql);//根据sql语句获取一行结果集
四、数据库实现原理
1.三大类
mysql.class.php 数据库实现类 :final class mysql;
db_factory.class.php 数据库工厂类 :final class db_factory;
model.class.php 数据模型基类 :class model。
2.实现流程(/phpcms/libs/class/)
(1)mysql.class.php提供数据库连接、查询、执行等各种实现方法;
/** * 真正开启数据库连接 * * @return void */ public function connect() { $func = $this->config['pconnect'] == 1 ? 'mysql_pconnect' : 'mysql_connect'; if(!$this->link = @$func($this->config['hostname'], $this->config['username'], $this->config['password'], 1)) { $this->halt('Can not connect to MySQL server'); return false; } if($this->version() > '4.1') { $charset = isset($this->config['charset']) ? $this->config['charset'] : ''; $serverset = $charset ? "character_set_connection='$charset',character_set_results='$charset',character_set_client=binary" : ''; $serverset .= $this->version() > '5.0.1' ? ((empty($serverset) ? '' : ',')." sql_mode='' ") : ''; $serverset && mysql_query("SET $serverset", $this->link); } if($this->config['database'] && !@mysql_select_db($this->config['database'], $this->link)) { $this->halt('Cannot use database '.$this->config['database']); return false; } $this->database = $this->config['database']; return $this->link; }
(2)db_factory.class.php用get_instance($db_config = '')方法返回当前工厂类,用get_database($db_name)方法返回数据库操作实例(它调用工厂类的connect($db_name)来实现工厂类原理),
/** * 加载数据库驱动 * @param $db_name 数据库配置名称 * @return object */ public function connect($db_name) { $object = null; switch($this->db_config[$db_name]['type']) { case 'mysql' : pc_base::load_sys_class('mysql', '', 0); $object = new mysql(); break; case 'mysqli' : $object = pc_base::load_sys_class('mysqli'); break; case 'access' : $object = pc_base::load_sys_class('db_access'); break; default : pc_base::load_sys_class('mysql', '', 0); $object = new mysql(); } $object->open($this->db_config[$db_name]); return $object; }
(3)model.class.php加载工厂类(pc_base::load_sys_class('db_factory', '', 0);),提供数据库的curd操作方法。
$this->db = db_factory::get_instance($this->db_config)->get_database($this->db_setting);//获取数据库实例
总结:通过工厂类的get_instance()获取当前实例,调用工厂方法的get_database()连接数据库并返回数据库操作实例,并返回给model的$this->db,最后所有方法的调用直接通过$this->db调用model里的方法即可。