PHPCMS源码引擎分析

template($module = 'content', $template = 'index', $style = '');

template_compile($module, $template, $style = 'default');

/**
* 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;
}

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

/**
* 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;
}

/**
* 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;
}

$this->db = db_factory::get_instance($this->db_config)->get_database($this->db_setting);//获取数据库实例