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phpcms V9 home page template file analysis (transfer), _PHP tutorial
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phpcms V9 home page template file analysis (transfer), _PHP tutorial
phpcms V9 home page template file analysis (transfer), _PHP tutorial
Jul 12, 2016 am 08:49 AM
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phpcms V9 首頁(yè)模板文件解析(轉(zhuǎn)），
轉(zhuǎn)自：http://www.cnblogs.com/Braveliu/p/5100018.html
轉(zhuǎn)在了解了《phpcms V9 URL訪問(wèn)解析》之后，我們已經(jīng)知道首頁(yè)最終執(zhí)行的是content模塊下index控制器的init方法。
下面， 我們逐步分析過(guò)程如下：
第一、首頁(yè)默認(rèn)執(zhí)行的是index.php?m=content&c=index&a=init
如下代碼（路徑：phpcms\modules\content\index.php），先從init函數(shù)分析：
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 $this->_groupid = param::get_cookie('_groupid');
10 }
11 //首頁(yè)
12 public function init()
13 {
14 if(isset($_GET['siteid']))
15 {
16 $siteid = intval($_GET['siteid']); //當(dāng)前站點(diǎn)id 函數(shù)intval作用變量轉(zhuǎn)成整數(shù)類型
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 搜索引擎優(yōu)化信息
28 $SEO = seo($siteid); //調(diào)用第二步，獲取當(dāng)前站點(diǎn)當(dāng)前欄目下生成的SEO信息
29 $sitelist = getcache('sitelist','commons'); //緩存后臺(tái)設(shè)置的所有站點(diǎn)配置信息
30 $default_style = $sitelist[$siteid]['default_style']; //當(dāng)前站點(diǎn)默認(rèn)模板風(fēng)格配置
31 $CATEGORYS = getcache('category_content_'.$siteid,'commons'); //當(dāng)前站點(diǎn)所有欄目詳細(xì)配置信息
32 include template('content','index',$default_style); //調(diào)用第三步：模板調(diào)用
33 }
第二、獲取SEO信息：phpcms/libs/functions/global.func.php
1 /**
2 * 生成SEO
3 * @param $siteid 站點(diǎn)ID
4 * @param $catid 欄目ID
5 * @param $title 標(biāo)題
6 * @param $description 描述
7 * @param $keyword 關(guān)鍵詞
8 */
9 function seo($siteid, $catid = '', $title = '', $description = '', $keyword = '')
10 {
11 if (!empty($title))
12 $title = strip_tags($title); //過(guò)濾title。 strip_tags() 函數(shù)剝?nèi)プ址械?HTML、XML 以及 PHP 的標(biāo)簽。
13 if (!empty($description))
14 $description = strip_tags($description); //過(guò)濾description
15 if (!empty($keyword))
16 $keyword = str_replace(' ', ',', strip_tags($keyword)); //過(guò)濾keyword
17 $sites = getcache('sitelist', 'commons'); //獲取所有站點(diǎn)詳細(xì)配置信息
18 $site = $sites[$siteid]; //當(dāng)前站點(diǎn)詳細(xì)配置信息
19 $cat = array();
20 if (!empty($catid)) //欄目ID不為空
21 {
22 $siteids = getcache('category_content','commons'); //獲取所有欄目對(duì)應(yīng)的站點(diǎn)ID緩存文件，格式：欄目ID=>站點(diǎn)ID
23 $siteid = $siteids[$catid]; //當(dāng)前欄目對(duì)應(yīng)的站點(diǎn)ID
24 $categorys = getcache('category_content_'.$siteid,'commons'); //獲取當(dāng)前站點(diǎn)下所有欄目的詳細(xì)配置信息
25 $cat = $categorys[$catid]; //當(dāng)前站點(diǎn)下當(dāng)前欄目的詳細(xì)配置信息
26 $cat['setting'] = string2array($cat['setting']); //當(dāng)前站點(diǎn)當(dāng)前欄目詳細(xì)配置信息的setting設(shè)置信息，轉(zhuǎn)化為數(shù)組
27 }
28 //站點(diǎn)title
29 $seo['site_title'] =isset($site['site_title']) && !empty($site['site_title']) ? $site['site_title'] : $site['name'];
30 //關(guān)鍵字
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 //標(biāo)題
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); //將seo信息中\(zhòng)n和\r替換為空
39 }
40 return $seo; //返回seo數(shù)組信息
41 }
第三、模板調(diào)用：phpcms/libs/functions/global.func.php
1 /**
2 * 模板調(diào)用
3 *
4 * @param $module 默認(rèn)為content
5 * @param $template 默認(rèn)為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 { // 檢測(cè)模塊里面是否包含plugin字符，這里進(jìn)行了對(duì)插件模板的判斷，插件模板需要調(diào)用p_template過(guò)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')) // 是否定義了SITEID常量
23 {
24 $siteid = SITEID;
25 }
26 else
27 {
28 $siteid = param::get_cookie('siteid');
29 }
30 if (!$siteid) $siteid = 1;
31 $sitelist = getcache('sitelist','commons'); //獲取所有站點(diǎn)的詳細(xì)配置信息
32 if(!empty($siteid))
33 {
34 $style = $sitelist[$siteid]['default_style']; //獲取當(dāng)前站點(diǎn)的默認(rèn)模板風(fēng)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 //模板解析類，文件路徑：phpcms/libs/classes/template_cache.class.php
48 $template_cache = pc_base::load_sys_class('template_cache');
49 //編譯文件緩存路徑：根目錄/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 //首頁(yè)模板文件，如文件路徑：phpcms/templates/dafault/content/index.html
52 if(file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html'))
53 {
54 //如果編譯文件不存在或者說(shuō)模板文件的創(chuàng)建時(shí)間大于編譯文件的生成時(shí)間，則重新編譯
55 if(!file_exists($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); //調(diào)用第四步：適用模板風(fēng)格不是default的情況
58 }
59 }
60 else
61 {
62 //編譯文件緩存路徑：根目錄/caches/caches_template/default/content/index.php
63 $compiledtplfile = PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';
64 //如果編譯文件不存在或者說(shuō)前臺(tái)公共的模板文件存在，并且前臺(tái)公共模板文件的創(chuàng)建時(shí)間大于編譯文件的生成時(shí)間
65 if(!file_exists($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 //重新編譯
68 $template_cache->template_compile($module, $template, 'default');
69 }
70 elseif (!file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html'))
71 { //如果前臺(tái)公共的模板文件不存在的話，則提示模板不存在
72 showmessage('Template does not exist.'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html');
73 }
74 }
75 //返回編譯文件
76 return $compiledtplfile;
77 }
第四、模板解析：phpcms/libs/classes/template_cache.class.php
1 /**
2 * 模板解析緩存
3 */
4 final class template_cache
5 {
6
7 /**
8 * 編譯模板
9 *
10 * @param $module 模塊名稱
11 * @param $template 模板文件名
12 * @param $istag 是否為標(biāo)簽?zāi)０?13 * @return unknown
14 */
15
16 public function template_compile($module, $template, $style = 'default')
17 {
18 if(strpos($module, '/')=== false) // 如果“/”不存在
19 {
20 //路徑：phpcms/templates/default/content/index.html 如：首頁(yè)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 ( $tplfile ))
40 {
41 //如果公共模板文件不存在，則提示模板文件不存在，如：/templates/default/content/index.html is not exists!
42 showmessage ( "templates".DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.".html is not exists!" );
43 }
44 //獲取公共模板文件中的內(nèi)容
45 $content = @file_get_contents ( $tplfile );
46 //要生成的編譯文件所在目錄
47 $filepath = CACHE_PATH.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR;
48 if(!is_dir($filepath))
49 {
50 //如果目錄不存在，則層級(jí)創(chuàng)建所有目錄
51 mkdir($filepath, 0777, true);
52 }
53 //編譯文件的全路徑
54 $compiledtplfile = $filepath.$template.'.php';
55 //解析公共模板文件中的內(nèi)容及標(biāo)簽，并返回解析后的內(nèi)容
56 $content = $this->template_parse($content); // 調(diào)用下一個(gè)過(guò)程
57 //將解析后的公共模板文件內(nèi)容寫入到要生成的編譯文件中
58 $strlen = file_put_contents ( $compiledtplfile, $content );
59 //給生成的編譯文件設(shè)置權(quán)限
60 chmod ( $compiledtplfile, 0777 );
61 //返回寫入編譯文件的字節(jié)數(shù)
62 return $strlen;
63 }
64
65 /**
66 * 解析模板
67 *
68 * @param $str 模板內(nèi)容
69 * @return ture
70 */
71 public function template_parse($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 循環(huán)
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 }
第五、PC標(biāo)簽的解析：phpcms/libs/classes/template_cache.class.php 文件
1 /**
2 * 解析PC標(biāo)簽
3 * @param string $op 操作方式
4 * @param string $data 參數(shù)
5 * @param string $html 匹配到的所有的HTML代碼
6 */
7 public static function pc_tag($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 //可視化條件
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] = $v[2];//如果pc標(biāo)簽中參數(shù)在默認(rèn)參數(shù)數(shù)組$arr中存在，則將參數(shù)轉(zhuǎn)換為變量，如：$page=value等
22 continue;
23 }
24 $datas[$v[1]] = $v[2];//如果pc標(biāo)簽中參數(shù)不在默認(rèn)參數(shù)數(shù)組$arr中存在，則直接將其放置到$datas[參數(shù)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標(biāo)簽分兩大類：工具類和模塊類。工具類執(zhí)行如下代碼
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標(biāo)簽分兩大類：工具類和模塊類。模塊類執(zhí)行如下代碼
101 if (!isset($action) || empty($action))
102 return false;
103 //content模塊：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 檢查content_tag類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)) //分頁(yè)參數(shù)
117 {
118 $str .= '$pagesize = '.$num.';'; //每頁(yè)顯示數(shù)據(jù)量
119 $str .= '$page = intval('.$page.') ? intval('.$page.') : 1;if($page<=0){$page=1;}';//當(dāng)前頁(yè)碼
120 $str .= '$offset = ($page - 1) * $pagesize;';//要查詢數(shù)據(jù)的開(kāi)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).');';//分頁(yè)方法
124 $str .= '$pages = pages($'.$op.'_total, $page, $pagesize, $urlrule);';
125 }
126 //調(diào)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 * 解析結(jié)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\">編輯</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 }
第六、PC標(biāo)簽類。文件路徑：phpcms/modules/content/classes/content_tag.class.php
1 class content_tag
2 {
3 private $db;
4 public function __construct()
5 {
6 $this->db = pc_base::load_model('content_model'); //調(diào)用第七步，數(shù)據(jù)模型，對(duì)應(yīng)數(shù)據(jù)表為news和news_data
7 $this->position = pc_base::load_model('position_data_model'); //數(shù)據(jù)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 $siteids = getcache('category_content','commons'); //獲取所有欄目所屬的站點(diǎn)id
17 if(!$siteids[$catid])
18 return false; //不存在此欄目，返回false
19 $siteid = $siteids[$catid]; //當(dāng)前欄目所屬站點(diǎn)id
20 if ($CATS[$siteid])
21 {
22 $this->category = $CATS[$siteid];
23 }
24 else
25 {
26 //獲取當(dāng)前站點(diǎn)id下所有欄目的配置信息
27 $CATS[$siteid] = $this->category = getcache('category_content_'.$siteid,'commons');
28 }
29 if($this->category[$catid]['type']!=0)
30 return false; //如果不為內(nèi)部欄目，返回false 0-內(nèi)部欄目 1-單網(wǎng)頁(yè) 2-外部鏈接
31 $this->modelid = $this->category[$catid]['modelid']; //獲取當(dāng)前欄目所屬模型id
32 $this->db->set_model($this->modelid); //調(diào)用第七步
33 $this->tablename = $this->db->table_name; //數(shù)據(jù)表名
34 if(empty($this->category))
35 {
36 //當(dāng)前站點(diǎn)id下所有欄目的配置信息
37 return false;
38 }
39 else
40 {
41 return true;
42 }
43 }
44 /**
45 * 分頁(yè)統(tǒng)計(jì)
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 * 列表頁(yè)標(biāo)簽
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標(biāo)簽中設(shè)置了條件
86 {
87 $sql = $data['where']; //pc標(biāo)簽中的條件
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標(biāo)簽中排序字段
105
106 //從數(shù)據(jù)庫(kù)中獲取主表數(shù)據(jù)，使用的也是sql語(yǔ)句查詢
107 $return = $this->db->select($sql, '*', $data['limit'], $order, '', 'id');
108
109 //調(diào)用副表的數(shù)據(jù)
110 if (isset($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]); //主表中數(shù)據(jù)與副表中數(shù)據(jù)合并
135 }
136 }
137 }
138 }
139 return $return; //返回查詢到的數(shù)據(jù)
140 }
注意：由以上分析可知，pc標(biāo)簽內(nèi)部原理也是通過(guò)sql語(yǔ)句來(lái)獲取數(shù)據(jù)的。
另外，PC標(biāo)簽分模塊來(lái)使用，內(nèi)容模塊PC標(biāo)簽可用來(lái)完成如下功能：
（1）獲取內(nèi)容列表：lists 方法 （如上）
（2）獲取點(diǎn)擊排行榜：hits 方法 （詳細(xì)見(jiàn)文件content_tag.class.php）
（3）獲取相關(guān)文章：relation 方法 （詳細(xì)見(jiàn)文件content_tag.class.php）
（4）獲取欄目列表：category 方法 （詳細(xì)見(jiàn)文件content_tag.class.php）
第七、content_model類。文件路徑：phpcms/model/content_model.class.php
1 /**
2 * 內(nèi)容模型數(shù)據(jù)庫(kù)操作類
3 */
4 pc_base::load_sys_class('model', '', 0);
5 class content_model extends model
6 {
7 public $table_name = ''; // 數(shù)據(jù)庫(kù)表名
8 public $category = ''; // 欄目
9 public function __construct()
10 {
11 $this->db_config = pc_base::load_config('database'); //加載數(shù)據(jù)庫(kù)配置信息
12 $this->db_setting = 'default'; // 加載數(shù)據(jù)庫(kù)默認(rèn)的配置信息
13 parent::__construct(); // 調(diào)用父類的構(gòu)造函數(shù)
14 $this->url = pc_base::load_app_class('url', 'content');
15 $this->siteid = get_siteid(); //獲取當(dāng)前站點(diǎn)id
16 }
17 public function set_model($modelid)
18 {
19 //獲取所有模型的配置信息 1-文檔模型 2-下載模型 3-圖片模型 跟后臺(tái)設(shè)置有關(guān)
20 $this->model = getcache('model', 'commons');
21 //當(dāng)前模型id
22 $this->modelid = $modelid;
23 //模型所對(duì)應(yīng)的數(shù)據(jù)表(文檔模型->news 圖片模型->picture 下載模型->download)
24 $this->table_name = $this->db_tablepre.$this->model[$modelid]['tablename'];
25 $this->model_tablename = $this->model[$modelid]['tablename'];
26 }
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