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phpcms V9 home page template file analysis (transfer), _PHP tutorial

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Jul 12, 2016 am 08:49 AM

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phpcms V9 首页模板文件解析(转），

转自：http://www.cnblogs.com/Braveliu/p/5100018.html

转在了解了《phpcms V9 URL访问解析》之后，我们已经知道首页最终执行的是content模块下index控制器的init方法。

下面，我们逐步分析过程如下：

第一、首页默认执行的是index.php?m=content&c=index&a=init

如下代码（路径：phpcms\modules\content\index.php），先从init函数分析：

phpcms V9 home page template file analysis (transfer), _PHP tutorial

 1 class index 
 2 {
 3     private $db;
 4     function __construct() 
 5     {
 6         $this->db = pc_base::load_model('content_model');
 7         $this->_userid = param::get_cookie('_userid');
 8         $this->_username = param::get_cookie('_username');
 9         $this->_groupid = param::get_cookie('_groupid');
10     }
11     //首页
12     public function init() 
13     {
14         if(isset($_GET['siteid'])) 
15         {
16             $siteid = intval($_GET['siteid']); //当前站点id  函数intval作用变量转成整数类型
17         } 
18         else 
19         {
20             $siteid = 1;
21         }
22         $siteid = $GLOBALS['siteid'] = max($siteid,1);
23         define('SITEID', $siteid);
24         $_userid = $this->_userid;
25         $_username = $this->_username;
26         $_groupid = $this->_groupid;
27         //SEO 搜索引擎优化信息
28         $SEO = seo($siteid); //调用第二步，获取当前站点当前栏目下生成的SEO信息
29         $sitelist  = getcache('sitelist','commons'); //缓存后台设置的所有站点配置信息
30         $default_style = $sitelist[$siteid]['default_style']; //当前站点默认模板风格配置
31         $CATEGORYS = getcache('category_content_'.$siteid,'commons'); //当前站点所有栏目详细配置信息
32         include template('content','index',$default_style); //调用第三步：模板调用
33     }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

第二、获取SEO信息：phpcms/libs/functions/global.func.php

phpcms V9 home page template file analysis (transfer), _PHP tutorial

 1 /**
 2  * 生成SEO
 3  * @param $siteid       站点ID
 4  * @param $catid        栏目ID
 5  * @param $title        标题
 6  * @param $description  描述
 7  * @param $keyword      关键词
 8  */
 9 function seo($siteid, $catid = '', $title = '', $description = '', $keyword = '') 
10 {
11     if (!empty($title))
12         $title = strip_tags($title); //过滤title。 strip_tags() 函数剥去字符串中的 HTML、XML 以及 PHP 的标签。
13     if (!empty($description)) 
14         $description = strip_tags($description); //过滤description
15     if (!empty($keyword)) 
16         $keyword = str_replace(' ', ',', strip_tags($keyword)); //过滤keyword
17     $sites = getcache('sitelist', 'commons'); //获取所有站点详细配置信息
18     $site = $sites[$siteid];    //当前站点详细配置信息
19     $cat = array();
20     if (!empty($catid))     //栏目ID不为空
21     {
22         $siteids = getcache('category_content','commons'); //获取所有栏目对应的站点ID缓存文件，格式：栏目ID=>站点ID
23         $siteid = $siteids[$catid]; //当前栏目对应的站点ID
24         $categorys = getcache('category_content_'.$siteid,'commons'); //获取当前站点下所有栏目的详细配置信息
25         $cat = $categorys[$catid];    //当前站点下当前栏目的详细配置信息 
26         $cat['setting'] = string2array($cat['setting']); //当前站点当前栏目详细配置信息的setting设置信息，转化为数组
27     }
28     //站点title
29     $seo['site_title'] =isset($site['site_title']) && !empty($site['site_title']) ? $site['site_title'] : $site['name'];
30     //关键字
31     $seo['keyword'] = !empty($keyword) ? $keyword : $site['keywords'];
32     //描述
33     $seo['description'] = isset($description) && !empty($description) ? $description : (isset($cat['setting']['meta_description']) && !empty($cat['setting']['meta_description']) ? $cat['setting']['meta_description'] : (isset($site['description']) && !empty($site['description']) ? $site['description'] : ''));
34     //标题
35     $seo['title'] =  (isset($title) && !empty($title) ? $title.' - ' : '').(isset($cat['setting']['meta_title']) && !empty($cat['setting']['meta_title']) ? $cat['setting']['meta_title'].' - ' : (isset($cat['catname']) && !empty($cat['catname']) ? $cat['catname'].' - ' : ''));
36     foreach ($seo as $k=>$v) 
37     {
38         $seo[$k] = str_replace(array("\n","\r"),    '', $v); //将seo信息中\n和\r替换为空
39     }
40     return $seo;    //返回seo数组信息
41 }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

第三、模板调用：phpcms/libs/functions/global.func.php

phpcms V9 home page template file analysis (transfer), _PHP tutorial

 1 /**
 2  * 模板调用
 3  *
 4  * @param $module 默认为content
 5  * @param $template 默认为index
 6  * @param $istag
 7  * @return unknown_type
 8  */
 9 function template($module = 'content', $template = 'index', $style = '') 
10 {
11     if(strpos($module, 'plugin/')!== false) 
12     { // 检测模块里面是否包含plugin字符，这里进行了对插件模板的判断，插件模板需要调用p_template过程解析
13         $plugin = str_replace('plugin/', '', $module);
14         return p_template($plugin, $template,$style);
15     }
16     $module = str_replace('/', DIRECTORY_SEPARATOR, $module);
17     if(!empty($style) && preg_match('/([a-z0-9\-_]+)/is',$style)) 
18     {
19     } 
20     elseif (empty($style) && !defined('STYLE')) 
21     {
22         if(defined('SITEID'))  // 是否定义了SITEID常量
23         {
24             $siteid = SITEID;
25         } 
26         else 
27         {
28             $siteid = param::get_cookie('siteid');
29         }
30         if (!$siteid) $siteid = 1;
31         $sitelist = getcache('sitelist','commons'); //获取所有站点的详细配置信息
32         if(!empty($siteid)) 
33         {
34             $style = $sitelist[$siteid]['default_style']; //获取当前站点的默认模板风格
35         }
36     } 
37     elseif (empty($style) && defined('STYLE')) 
38     {
39         $style = STYLE;
40     } 
41     else 
42     {
43         $style = 'default';
44     }
45     if(!$style) 
46         $style = 'default';
47     //模板解析类，文件路径：phpcms/libs/classes/template_cache.class.php
48     $template_cache = pc_base::load_sys_class('template_cache');
49     //编译文件缓存路径：根目录/caches/caches_template/default/content/index.php
50     $compiledtplfile = PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';
51     //首页模板文件，如文件路径：phpcms/templates/dafault/content/index.html
52     if(file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) 
53     {
54         //如果编译文件不存在或者说模板文件的创建时间大于编译文件的生成时间，则重新编译
55         if(!file_exists($compiledtplfile) || (@filemtime(PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > @filemtime($compiledtplfile))) 
56         {
57             $template_cache->template_compile($module, $template, $style); //调用第四步：适用模板风格不是default的情况
58         }
59     } 
60     else 
61     {
62         //编译文件缓存路径：根目录/caches/caches_template/default/content/index.php 
63         $compiledtplfile = PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';
64         //如果编译文件不存在或者说前台公共的模板文件存在，并且前台公共模板文件的创建时间大于编译文件的生成时间
65         if(!file_exists($compiledtplfile) || (file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') && filemtime(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > filemtime($compiledtplfile))) 
66         {
67             //重新编译
68             $template_cache->template_compile($module, $template, 'default');
69         } 
70         elseif (!file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) 
71         {  //如果前台公共的模板文件不存在的话，则提示模板不存在
72             showmessage('Template does not exist.'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html');
73         }
74     }
75     //返回编译文件
76     return $compiledtplfile;
77 }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

第四、模板解析：phpcms/libs/classes/template_cache.class.php

phpcms V9 home page template file analysis (transfer), _PHP tutorial

 1 /**
 2  *  模板解析缓存
 3  */
 4 final class template_cache 
 5 {
 6     
 7     /**
 8      * 编译模板
 9      *
10      * @param $module    模块名称
11      * @param $template    模板文件名
12      * @param $istag    是否为标签模板
13      * @return unknown
14      */
15     
16     public function template_compile($module, $template, $style = 'default') 
17     {
18         if(strpos($module, '/')=== false) // 如果“/”不存在
19         {
20             //路径：phpcms/templates/default/content/index.html 如：首页公共模板文件  
21             $tplfile = $_tpl = PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html';
22         } 
23         elseif (strpos($module, 'yp/') !== false) 
24         {
25             $module = str_replace('/', DIRECTORY_SEPARATOR, $module);
26             $tplfile = $_tpl = PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html';
27         } 
28         else 
29         {
30             $plugin = str_replace('plugin/', '', $module);
31             $module = str_replace('/', DIRECTORY_SEPARATOR, $module);
32             $tplfile = $_tpl = PC_PATH.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.'templates'.DIRECTORY_SEPARATOR.$template.'.html';
33         }
34         if ($style != 'default' && !file_exists ( $tplfile )) 
35         {
36             $style = 'default';
37             $tplfile = PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html';
38         }
39         if (! file_exists ( $tplfile ))
40         {
41             //如果公共模板文件不存在，则提示模板文件不存在，如：/templates/default/content/index.html is not exists!
42             showmessage ( "templates".DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.".html is not exists!" );
43         }
44         //获取公共模板文件中的内容
45         $content = @file_get_contents ( $tplfile );
46         //要生成的编译文件所在目录
47         $filepath = CACHE_PATH.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR;
48         if(!is_dir($filepath)) 
49         {
50             //如果目录不存在，则层级创建所有目录
51             mkdir($filepath, 0777, true);
52         }
53         //编译文件的全路径
54         $compiledtplfile = $filepath.$template.'.php';
55         //解析公共模板文件中的内容及标签，并返回解析后的内容  
56         $content = $this->template_parse($content); // 调用下一个过程
57         //将解析后的公共模板文件内容写入到要生成的编译文件中
58         $strlen = file_put_contents ( $compiledtplfile, $content );
59         //给生成的编译文件设置权限
60         chmod ( $compiledtplfile, 0777 );
61         //返回写入编译文件的字节数
62         return $strlen;
63     }
64 
65     /**
66      * 解析模板
67      *
68      * @param $str    模板内容
69      * @return ture
70      */
71     public function template_parse($str) {
72         $str = preg_replace ( "/\{template\s+(.+)\}/", "<?php include template(\\1); ?>", $str );
73         $str = preg_replace ( "/\{include\s+(.+)\}/", "<?php include \\1; ?>", $str );
74         $str = preg_replace ( "/\{php\s+(.+)\}/", "<?php \\1?>", $str );
75         $str = preg_replace ( "/\{if\s+(.+?)\}/", "<?php if(\\1) { ?>", $str );
76         $str = preg_replace ( "/\{else\}/", "<?php } else { ?>", $str );
77         $str = preg_replace ( "/\{elseif\s+(.+?)\}/", "<?php } elseif (\\1) { ?>", $str );
78         $str = preg_replace ( "/\{\/if\}/", "<?php } ?>", $str );
79         //for 循环
80         $str = preg_replace("/\{for\s+(.+?)\}/","<?php for(\\1) { ?>",$str);
81         $str = preg_replace("/\{\/for\}/","<?php } ?>",$str);
82         //++ --
83         $str = preg_replace("/\{\+\+(.+?)\}/","<?php ++\\1; ?>",$str);
84         $str = preg_replace("/\{\-\-(.+?)\}/","<?php ++\\1; ?>",$str);
85         $str = preg_replace("/\{(.+?)\+\+\}/","<?php \\1++; ?>",$str);
86         $str = preg_replace("/\{(.+?)\-\-\}/","<?php \\1--; ?>",$str);
87         $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\}/", "<?php \$n=1;if(is_array(\\1)) foreach(\\1 AS \\2) { ?>", $str );
88         $str = preg_replace ( "/\{loop\s+(\S+)\s+(\S+)\s+(\S+)\}/", "<?php \$n=1; if(is_array(\\1)) foreach(\\1 AS \\2 => \\3) { ?>", $str );
89         $str = preg_replace ( "/\{\/loop\}/", "<?php \$n++;}unset(\$n); ?>", $str );
90         $str = preg_replace ( "/\{([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/", "<?php echo \\1;?>", $str );
91         $str = preg_replace ( "/\{\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff:]*\(([^{}]*)\))\}/", "<?php echo \\1;?>", $str );
92         $str = preg_replace ( "/\{(\\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/", "<?php echo \\1;?>", $str );
93         $str = preg_replace("/\{(\\$[a-zA-Z0-9_\[\]\'\"\$\x7f-\xff]+)\}/es", "\$this->addquote('<?php echo \\1;?>')",$str);
94         $str = preg_replace ( "/\{([A-Z_\x7f-\xff][A-Z0-9_\x7f-\xff]*)\}/s", "<?php echo \\1;?>", $str );
95         $str = preg_replace("/\{pc:(\w+)\s+([^}]+)\}/ie", "self::pc_tag('$1','$2', '$0')", $str);
96         $str = preg_replace("/\{\/pc\}/ie", "self::end_pc_tag()", $str);
97         $str = "<?php defined('IN_PHPCMS') or exit('No permission resources.'); ?>" . $str;
98         return $str;
99     }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

第五、PC标签的解析：phpcms/libs/classes/template_cache.class.php 文件

phpcms V9 home page template file analysis (transfer), _PHP tutorial

  1 /**
  2      * 解析PC标签
  3      * @param string $op 操作方式
  4      * @param string $data 参数
  5      * @param string $html 匹配到的所有的HTML代码
  6      */
  7     public static function pc_tag($op, $data, $html) 
  8     {
  9         preg_match_all("/([a-z]+)\=[\"]?([^\"]+)[\"]?/i", stripslashes($data), $matches, PREG_SET_ORDER);
 10         $arr = array('action','num','cache','page', 'pagesize', 'urlrule', 'return', 'start');
 11         $tools = array('json', 'xml', 'block', 'get');
 12         $datas = array();
 13         $tag_id = md5(stripslashes($html));
 14         //可视化条件
 15         $str_datas = 'op='.$op.'&tag_md5='.$tag_id;
 16         foreach ($matches as $v) 
 17         {
 18             $str_datas .= $str_datas ? "&$v[1]=".($op == 'block' && strpos($v[2], '$') === 0 ? $v[2] : urlencode($v[2])) : "$v[1]=".(strpos($v[2], '$') === 0 ? $v[2] : urlencode($v[2]));
 19             if(in_array($v[1], $arr)) 
 20             {
 21                 $$v[1] = $v[2];//如果pc标签中参数在默认参数数组$arr中存在，则将参数转换为变量，如：$page=value等 
 22                 continue;
 23             }
 24             $datas[$v[1]] = $v[2];//如果pc标签中参数不在默认参数数组$arr中存在，则直接将其放置到$datas[参数名]=value中 
 25         }
 26         $str = '';
 27         $num = isset($num) && intval($num) ? intval($num) : 20;
 28         $cache = isset($cache) && intval($cache) ? intval($cache) : 0;
 29         $return = isset($return) && trim($return) ? trim($return) : 'data';
 30         if (!isset($urlrule)) $urlrule = '';
 31         if (!empty($cache) && !isset($page)) 
 32         {
 33             $str .= '$tag_cache_name = md5(implode(\'&\','.self::arr_to_html($datas).').\''.$tag_id.'\');if(!$'.$return.' = tpl_cache($tag_cache_name,'.$cache.')){';
 34         }
 35         if (in_array($op,$tools)) 
 36         { //pc标签分两大类：工具类和模块类。工具类执行如下代码
 37             switch ($op) 
 38             {
 39                 case 'json':
 40                         if (isset($datas['url']) && !empty($datas['url'])) 
 41                         {
 42                             $str .= '$json = @file_get_contents(\''.$datas['url'].'\');';
 43                             $str .= '$'.$return.' = json_decode($json, true);';
 44                         }
 45                     break;
 46                     
 47                 case 'xml':
 48                         $str .= '$xml = pc_base::load_sys_class(\'xml\');';
 49                         $str .= '$xml_data = @file_get_contents(\''.$datas['url'].'\');';
 50                         $str .= '$'.$return.' = $xml->xml_unserialize($xml_data);';
 51                     break;
 52                     
 53                 case 'get':
 54                         $str .= 'pc_base::load_sys_class("get_model", "model", 0);';
 55                         if ($datas['dbsource']) 
 56                         {
 57                             $dbsource = getcache('dbsource', 'commons');
 58                             if (isset($dbsource[$datas['dbsource']])) 
 59                             {
 60                                 $str .= '$get_db = new get_model('.var_export($dbsource,true).', \''.$datas['dbsource'].'\');';
 61                             } 
 62                             else 
 63                             {
 64                                 return false;
 65                             }
 66                         } 
 67                         else 
 68                         {
 69                             $str .= '$get_db = new get_model();';
 70                         }
 71                         $num = isset($num) && intval($num) > 0 ? intval($num) : 20;
 72                         if (isset($start) && intval($start)) 
 73                         {
 74                             $limit = intval($start).','.$num;
 75                         } 
 76                         else 
 77                         {
 78                             $limit = $num;
 79                         }
 80                         if (isset($page)) 
 81                         {
 82                             $str .= '$pagesize = '.$num.';';
 83                             $str .= '$page = intval('.$page.') ? intval('.$page.') : 1;if($page<=0){$page=1;}';
 84                             $str .= '$offset = ($page - 1) * $pagesize;';
 85                             $limit = '$offset,$pagesize';
 86                             $sql = 'SELECT COUNT(*) as count FROM ('.$datas['sql'].') T';
 87                             $str .= '$r = $get_db->sql_query("'.$sql.'");$s = $get_db->fetch_next();$pages=pages($s[\'count\'], $page, $pagesize, $urlrule);';
 88                         }
 89                         
 90                         $str .= '$r = $get_db->sql_query("'.$datas['sql'].' LIMIT '.$limit.'");while(($s = $get_db->fetch_next()) != false) {$a[] = $s;}$'.$return.' = $a;unset($a);';
 91                     break;
 92                     
 93                 case 'block':
 94                     $str .= '$block_tag = pc_base::load_app_class(\'block_tag\', \'block\');';
 95                     $str .= 'echo $block_tag->pc_tag('.self::arr_to_html($datas).');';
 96                     break;
 97             }
 98         } 
 99         else 
100         {    //pc标签分两大类：工具类和模块类。模块类执行如下代码
101             if (!isset($action) || empty($action)) 
102                 return false;
103             //content模块：phpcms/modules/content/classes/content_tag.class.php  
104             if (module_exists($op) && file_exists(PC_PATH.DIRECTORY_SEPARATOR.'modules'.DIRECTORY_SEPARATOR.$op.DIRECTORY_SEPARATOR.'classes'.DIRECTORY_SEPARATOR.$op.'_tag.class.php')) 
105             {
106                 //content_tag.class.php  检查content_tag类中是否存在的某方法
107                 $str .= '$'.$op.'_tag = pc_base::load_app_class("'.$op.'_tag", "'.$op.'");if (method_exists($'.$op.'_tag, \''.$action.'\')) {';    
108                 if (isset($start) && intval($start)) 
109                 {
110                     $datas['limit'] = intval($start).','.$num; //如：limit 0 , 10
111                 } 
112                 else 
113                 {
114                     $datas['limit'] = $num; //如：limit 10
115                 }
116                 if (isset($page)) //分页参数
117                 {
118                     $str .= '$pagesize = '.$num.';'; //每页显示数据量
119                     $str .= '$page = intval('.$page.') ? intval('.$page.') : 1;if($page<=0){$page=1;}';//当前页码
120                     $str .= '$offset = ($page - 1) * $pagesize;';//要查询数据的开始位置
121                     $datas['limit'] = '$offset.",".$pagesize';
122                     $datas['action'] = $action; //方法，如，content_tag.class.php中的lists方法 
123                     $str .= '$'.$op.'_total = $'.$op.'_tag->count('.self::arr_to_html($datas).');';//分页方法
124                     $str .= '$pages = pages($'.$op.'_total, $page, $pagesize, $urlrule);';
125                 }
126                 //调用第七步：content_tag.class.php中方法
127                 $str .= '$'.$return.' = $'.$op.'_tag->'.$action.'('.self::arr_to_html($datas).');';
128                 $str .= '}';
129             } 
130         }
131         if (!empty($cache) && !isset($page)) 
132         {
133             $str .= 'if(!empty($'.$return.')){setcache($tag_cache_name, $'.$return.', \'tpl_data\');}';
134             $str .= '}';
135         }
136         /**  
137          * 解析结果大概如下所示：  
138          <?php  
139          if(defined('IN_ADMIN')  && !defined('HTML')) 
140          {  
141             echo "<div class=\"admin_piao\" pc_action=\"content\" data=\"op=content&tag_md5=2d4b9e3c7c2cc4bd0cec8b1fac9ae764&action=position&posid=12&thumb=1&order=listorder+DESC&num=10\">  
142             <a href=\"javascript:void(0)\" class=\"admin_piao_edit\">编辑</a>";  
143          }  
144          $content_tag = pc_base::load_app_class("content_tag", "content");  
145          if (method_exists($content_tag, 'position')) 
146          {  
147             $data = $content_tag->position(array('posid'=>'12','thumb'=>'1','order'=>'listorder DESC','limit'=>'10',));  
148          }
149         ?>
150          */
151         return "<"."?php if(defined('IN_ADMIN')  && !defined('HTML')) {echo \"<div class=\\\"admin_piao\\\" pc_action=\\\"".$op."\\\" data=\\\"".$str_datas."\\\"><a href=\\\"javascript:void(0)\\\" class=\\\"admin_piao_edit\\\">".($op=='block' ? L('block_add') : L('edit'))."</a>\";}".$str."?".">";
152     }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

第六、PC标签类。文件路径：phpcms/modules/content/classes/content_tag.class.php

phpcms V9 home page template file analysis (transfer), _PHP tutorial

  1 class content_tag 
  2 {
  3     private $db;
  4     public function __construct() 
  5     {
  6         $this->db = pc_base::load_model('content_model'); //调用第七步，数据模型，对应数据表为news和news_data
  7         $this->position = pc_base::load_model('position_data_model'); //数据模型
  8     }
  9     /**
 10      * 初始化模型
 11      * @param $catid
 12      */
 13     public function set_modelid($catid) 
 14     {
 15         static $CATS;
 16         $siteids = getcache('category_content','commons'); //获取所有栏目所属的站点id
 17         if(!$siteids[$catid]) 
 18             return false; //不存在此栏目，返回false
 19         $siteid = $siteids[$catid]; //当前栏目所属站点id
 20         if ($CATS[$siteid]) 
 21         {
 22             $this->category = $CATS[$siteid];
 23         } 
 24         else 
 25         {
 26             //获取当前站点id下所有栏目的配置信息
 27             $CATS[$siteid] = $this->category = getcache('category_content_'.$siteid,'commons');
 28         }
 29         if($this->category[$catid]['type']!=0) 
 30             return false; //如果不为内部栏目，返回false  0-内部栏目 1-单网页 2-外部链接
 31         $this->modelid = $this->category[$catid]['modelid']; //获取当前栏目所属模型id 
 32         $this->db->set_model($this->modelid); //调用第七步
 33         $this->tablename = $this->db->table_name; //数据表名
 34         if(empty($this->category)) 
 35         {
 36             //当前站点id下所有栏目的配置信息
 37             return false;
 38         } 
 39         else
 40         {
 41             return true;
 42         }
 43     }
 44     /**
 45      * 分页统计
 46      * @param $data
 47      */
 48     public function count($data) 
 49     {
 50         if($data['action'] == 'lists') 
 51         {
 52             $catid = intval($data['catid']);
 53             if(!$this->set_modelid($catid)) return false;
 54             if(isset($data['where'])) 
 55             {
 56                 $sql = $data['where'];
 57             } 
 58             else 
 59             {
 60                 if($this->category[$catid]['child']) 
 61                 {
 62                     $catids_str = $this->category[$catid]['arrchildid'];
 63                     $pos = strpos($catids_str,',')+1;
 64                     $catids_str = substr($catids_str, $pos);
 65                     $sql = "status=99 AND catid IN ($catids_str)";
 66                 } 
 67                 else 
 68                 {
 69                     $sql = "status=99 AND catid='$catid'";
 70                 }
 71             }
 72             return $this->db->count($sql);
 73         }
 74     }
 75     
 76     /**
 77      * 列表页标签
 78      * @param $data
 79      */
 80     public function lists($data) 
 81     {
 82         $catid = intval($data['catid']);
 83         if(!$this->set_modelid($catid)) 
 84             return false;
 85         if(isset($data['where'])) //如果pc标签中设置了条件
 86         {
 87             $sql = $data['where']; //pc标签中的条件
 88         } 
 89         else 
 90         {
 91             $thumb = intval($data['thumb']) ? " AND thumb != ''" : '';
 92             if($this->category[$catid]['child']) 
 93             {
 94                 $catids_str = $this->category[$catid]['arrchildid'];
 95                 $pos = strpos($catids_str,',')+1;
 96                 $catids_str = substr($catids_str, $pos);
 97                 $sql = "status=99 AND catid IN ($catids_str)".$thumb;
 98             } 
 99             else 
100             {
101                 $sql = "status=99 AND catid='$catid'".$thumb;
102             }
103         }
104         $order = $data['order']; //pc标签中排序字段
105 
106         //从数据库中获取主表数据，使用的也是sql语句查询
107         $return = $this->db->select($sql, '*', $data['limit'], $order, '', 'id');
108                         
109         //调用副表的数据
110         if (isset($data['moreinfo']) && intval($data['moreinfo']) == 1) 
111         {
112             $ids = array();
113             foreach ($return as $v) 
114             {
115                 if (isset($v['id']) && !empty($v['id'])) 
116                 {
117                     $ids[] = $v['id'];
118                 } 
119                 else
120                 {
121                     continue;
122                 }
123             }
124             if (!empty($ids)) 
125             {
126                 $this->db->table_name = $this->db->table_name.'_data';//副表名
127                 $ids = implode('\',\'', $ids);
128                 $r = $this->db->select("`id` IN ('$ids')", '*', '', '', '', 'id');
129                 if (!empty($r)) 
130                 {
131                     foreach ($r as $k=>$v) 
132                     {
133                         if (isset($return[$k])) 
134                             $return[$k] = array_merge($v, $return[$k]); //主表中数据与副表中数据合并
135                     }
136                 }
137             }
138         }
139         return $return;  //返回查询到的数据
140     }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

注意：由以上分析可知，pc标签内部原理也是通过sql语句来获取数据的。

另外，PC标签分模块来使用，内容模块PC标签可用来完成如下功能：

（1）获取内容列表：lists 方法（如上）

（2）获取点击排行榜：hits 方法（详细见文件content_tag.class.php）

（3）获取相关文章：relation 方法（详细见文件content_tag.class.php）

（4）获取栏目列表：category 方法（详细见文件content_tag.class.php）

第七、content_model类。文件路径：phpcms/model/content_model.class.php

phpcms V9 home page template file analysis (transfer), _PHP tutorial

 1 /**
 2  * 内容模型数据库操作类
 3  */
 4 pc_base::load_sys_class('model', '', 0);
 5 class content_model extends model 
 6 {
 7     public $table_name = ''; // 数据库表名
 8     public $category = ''; // 栏目
 9     public function __construct() 
10     {
11         $this->db_config = pc_base::load_config('database');  //加载数据库配置信息
12         $this->db_setting = 'default'; // 加载数据库默认的配置信息
13         parent::__construct();  // 调用父类的构造函数
14         $this->url = pc_base::load_app_class('url', 'content');
15         $this->siteid = get_siteid(); //获取当前站点id
16     }
17     public function set_model($modelid)
18     {
19         //获取所有模型的配置信息  1-文档模型 2-下载模型 3-图片模型  跟后台设置有关
20         $this->model = getcache('model', 'commons');
21         //当前模型id
22         $this->modelid = $modelid;
23         //模型所对应的数据表(文档模型->news  图片模型->picture 下载模型->download) 
24         $this->table_name = $this->db_tablepre.$this->model[$modelid]['tablename'];
25         $this->model_tablename = $this->model[$modelid]['tablename'];
26     }

phpcms V9 home page template file analysis (transfer), _PHP tutorial

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