【phpcms-v9】前台模板文件中{pc}标签的执行流程

前台pc标签的使用：{pc:content 参数名="参数值" 参数名="参数值" 参数名="参数值"}

如： {pc:content action="lists" catid="9" cache="3600" num="20" page="$page"}{/pc}

执行流程如下：
     ①模块名：content
     ②模块类文件：modules/content/classes/content_tag.class.php，便于二次开发或标签的扩展
     ③文件中的方法：lists
     ④action后面的参数以数组的形式传递给lists方法，如：function lists($data=array())

此标签实际获取的是：content_tag.class.php文件中lists方法返回的数据

注意：此标签会根据catid的值去寻找对应的模型id，然后再根据对应的模型id寻找到对应的模型表，如：news
注意：几乎所有的模块都有一个标签类,格式如下:模块名_tag.class.php
注意：前台模板文件中出现{pc}标签的位置，都可在"碎片管理"中进行编辑修改，非常方便

content_tag.class.php文件分析-pc标签调用的方法

<?phpclass content_tag {private $db;//主要针对v9_news表public function __construct() {$this->db = pc_base::load_model('content_model');//数据模型，对应数据表news 和 news_data $this->position = pc_base::load_model('position_data_model');//position_data表}/** * 初始化模型,其实就是为了根据栏目id设置对应对应的模型表及数据表：news-模型表、v9_news-数据表 * @param $catid */public function set_modelid($catid) {$siteids = getcache('category_content','commons');//获取所有栏目所属的站点id if(!$siteids[$catid]) return false;//不存在此栏目，返回false $siteid = $siteids[$catid];//当前栏目所属站点id  $this->category = getcache('category_content_'.$siteid,'commons');//获取当前站点id下所有栏目的配置信息if($this->category[$catid]['type']!=0) 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$this->modelid = $this->category[$catid]['modelid'];//获取当前栏目所属模型id  $this->db->set_model($this->modelid);//根据模型id获取当前模型所对应的模型表和数据表 1：文档模型-news  3：图片模型-picture   2：下载模型-download$this->tablename = $this->db->table_name;//数据表:v9_newsif(empty($this->category)) {//如果当前站点下不存在栏目配置信息，则返回falsereturn false;} else {//如果当前站点下存在栏目配置信息，则返回truereturn true;}}/** * 分页统计 * @param $data */public function count($data) {if($data['action'] == 'lists') {$catid = intval($data['catid']);if(!$this->set_modelid($catid)) return false;if(isset($data['where'])) {$sql = $data['where'];} else {if($this->category[$catid]['child']) {$catids_str = $this->category[$catid]['arrchildid'];$pos = strpos($catids_str,',')+1;$catids_str = substr($catids_str, $pos);$sql = "status=99 AND catid IN ($catids_str)";} else {$sql = "status=99 AND catid='$catid'";}}return $this->db->count($sql);}}/** * 列表页标签：主要返回的是主表中数据与附表中数据， {pc:content action="lists"} {/pc}标签调用的都是lists方法 * @param $data */public function lists($data) {$catid = intval($data['catid']);//pc标签中catid属性if(!$this->set_modelid($catid)) return false;//会根据栏目id->对应的模型id->对应的模型表if(isset($data['where'])) {//如果pc标签中设置了where属性，一般情况下不存在$sql = $data['where'];} else {//如果pc标签中没有设置where属性 $thumb = intval($data['thumb']) ? " AND thumb != ''" : '';//如果有thumb属性if($this->category[$catid]['child']) {//当前栏目下是否存在子栏目$catids_str = $this->category[$catid]['arrchildid'];//所有子栏目id，包括当前栏目自身id$pos = strpos($catids_str,',')+1;$catids_str = substr($catids_str, $pos);//所有子栏目id,不包括当前栏目自身id$sql = "status=99 AND catid IN ($catids_str)".$thumb;//拼接成一个sql语句} else {$sql = "status=99 AND catid='$catid'".$thumb;//如果当前栏目下不存在子栏目}}$order = $data['order'];//pc标签中order属性//$sql作为一个条件出现，调用的是model.calss.php文件中的select方法，返回结果集数组，并按照键名'id'排序$return = $this->db->select($sql, '*', $data['limit'], $order, '', 'id');//从数据库中获取主表数据，使用的也是sql语句查询//调用副表的数据if (isset($data['moreinfo']) && intval($data['moreinfo']) == 1) {//如果pc标签中设置了moreinfo属性：是否调用附表数据$ids = array();//$return为返回的主表数据foreach ($return as $v) {//循环主表中的记录信息:$v-主表中的每条记录if (isset($v['id']) && !empty($v['id'])) {$ids[] = $v['id'];//ids[]是主表中排序完成的文章id数组} else {continue;}}if (!empty($ids)) {$this->db->table_name = $this->db->table_name.'_data';//副表名 $ids = implode('\',\'', $ids);//以逗号拼接成一个字符串$r = $this->db->select("`id` IN ('$ids')", '*', '', '', '', 'id');//查询与主表中数据有关的副表中的数据if (!empty($r)) {foreach ($r as $k=>$v) {//副表中的数据//$return:返回的主表中的数据，主表中的id字段值与附表中的id字段值是对应的，也就是说一篇文章在主表中存储的id跟在附表中存储的id的值是相等的if (isset($return[$k])) $return[$k] = array_merge($v, $return[$k]);//主表中数据与副表中数据合并 }}}}return $return;}/** * 相关文章标签，{pc:content action="relation"} {/pc}标签调用的都是relation方法 * @param $data */public function relation($data) {$catid = intval($data['catid']);//pc标签的catid属性：栏目idif(!$this->set_modelid($catid)) return false;$order = $data['order'];//pc标签的order属性$sql = "`status`=99";//拼接sql$limit = $data['id'] ? $data['limit']+1 : $data['limit'];if($data['relation']) {//pc标签的relation属性：相关文章id   格式如下：2|7|5$relations = explode('|',trim($data['relation'],'|'));//以 | 分割成一个数组$relations = array_diff($relations, array(null));$relations = implode(',',$relations);$sql = " `id` IN ($relations)";//拼接sql$key_array = $this->db->select($sql, '*', $limit, $order,'','id');//关联的文章} elseif($data['keywords']) {//相关关键词$keywords = str_replace('%', '',$data['keywords']);$keywords_arr = explode(' ',$keywords);//以空格将关键词分割为一个数组$key_array = array();$number = 0;//相关热词文章数量$i =1;//控制返回文章数量的标识foreach ($keywords_arr as $_k) {$sql2 = $sql." AND `keywords` LIKE '%$_k%'".(isset($data['id']) && intval($data['id']) ? " AND `id` != '".abs(intval($data['id']))."'" : '');$r = $this->db->select($sql2, '*', $limit, '','','id');$number += count($r);//所有热词文章的总量foreach ($r as $id=>$v) {if($i<= $data['limit'] && !in_array($id, $key_array)) $key_array[$id] = $v;//$key_array[文章id]=文章记录$i++;}if($data['limit']<$number) break;}}if($data['id']) unset($key_array[$data['id']]);//针对性的屏蔽某篇文章return $key_array;}/** * 排行榜标签{pc:content action="hits"} {/pc}标签调用的都是hits方法 * @param $data */public function hits($data) {$catid = intval($data['catid']);//栏目id，pc标签的catid属性if(!$this->set_modelid($catid)) return false;//根据栏目id->对应的模型id->模型表，如：news$this->hits_db = pc_base::load_model('hits_model');//hits：点击量表$sql = $desc = $ids = '';$array = $ids_array = array();$order = $data['order'];//pc标签中order属性$hitsid = 'c-'.$this->modelid.'-%';//hits点击量表中hitsid字段的组成：c-模型id-文章id$sql = "hitsid LIKE '$hitsid'";//拼接sqlif(isset($data['day'])) {//pc标签中day属性：表示调用多少天内的排行$updatetime = SYS_TIME-intval($data['day'])*86400;//表示调用多少天内的排行$sql .= " AND updatetime>'$updatetime'";//拼接sql}if($this->category[$catid]['child']) {//当前栏目是否有子栏目$catids_str = $this->category[$catid]['arrchildid'];//当前栏目下所有子栏目id，包括当前栏目自身的id$pos = strpos($catids_str,',')+1;$catids_str = substr($catids_str, $pos);//当前栏目下所有子栏目id，不包括当前栏目自身id$sql .= " AND catid IN ($catids_str)";//拼接sql} else {$sql .= " AND catid='$catid'";//如果当前栏目不存在子栏目}$hits = array();$result = $this->hits_db->select($sql, '*', $data['limit'], $order);//查询v9_hits点击量表foreach ($result as $r) {//$result:v9_hits表中返回的数据$pos = strpos($r['hitsid'],'-',2) + 1;//格式：c-模型id-文章id，如，c-1-1 ,查找第二个 "-"的位置$ids_array[] = $id = substr($r['hitsid'],$pos);//文章的id$hits[$id] = $r;//每篇文章的点击量信息 ，格式：$hits[文章id]= 文章点击记录信息}$ids = implode(',', $ids_array);//以逗号拼接成一个字符串if($ids) {$sql = "status=99 AND id IN ($ids)";//拼接sql} else {$sql = '';}$this->db->table_name = $this->tablename;//内容主表：v9_news$result = $this->db->select($sql, '*', $data['limit'],'','','id');  //查询内容主表：v9_newsforeach ($ids_array as $id) {if($result[$id]['title']!='') {$array[$id] = $result[$id];$array[$id] = array_merge($array[$id], $hits[$id]);//将内容主表v9_news中数据与点击量表v9_hits中数据合并，合并桥梁为id}}return $array;}/** * 栏目标签：主要用来返回当前栏目下的所有子栏目及子栏目的url链接地址等信息：{pc:content action="category"} {/pc}标签调用的都是category方法 * @param $data */public function category($data) {$data['catid'] = intval($data['catid']);//pc标签的catid属性：栏目id$array = array();$siteid = $data['siteid'] && intval($data['siteid']) ? intval($data['siteid']) : get_siteid();//pc标签的siteid属性：默认调用系统站点$categorys = getcache('category_content_'.$siteid,'commons');//获取当前站点下所有栏目的详细配置信息$site = siteinfo($siteid);//获取当前站点的信息$i = 1;foreach ($categorys as $catid=>$cat) {if($i>$data['limit']) break;if((!$cat['ismenu']) || $siteid && $cat['siteid']!=$siteid) continue;//ismenu:是否显示栏目，1-显示栏目   0-不显示栏目if (strpos($cat['url'], '://') === false) {//当前栏目的url链接地址中是否存在 "://"$cat['url'] = substr($site['domain'],0,-1).$cat['url'];//当前栏目的url链接地址}if($cat['parentid']==$data['catid']) {//默认为0，调用一级栏目，$cat['parentid']只有一个值$array[$catid] = $cat;//所有子栏目信息$i++;}}return $array;}/** * 推荐位，主要用来返回当前推荐位置所有文章的标题和url链接地址等信息：{pc:content action="position"} {/pc}标签调用的都是position方法 * @param $data */public function position($data) {$sql = '';$array = array();$posid = intval($data['posid']);//pc标签中posid属性：推荐位id$order = $data['order'];//pc标签中order属性$thumb = (empty($data['thumb']) || intval($data['thumb']) == 0) ? 0 : 1;//pc标签中thumb属性$siteid = $GLOBALS['siteid'] ? $GLOBALS['siteid'] : 1;//当前站点id$catid = (empty($data['catid']) || $data['catid'] == 0) ? '' : intval($data['catid']);//pc标签中的catid属性if($catid) {//如果栏目id存在$siteids = getcache('category_content','commons');//获取所有栏目所对应的站点idif(!$siteids[$catid]) return false;//当前站点下不存在当前栏目，则返回false$siteid = $siteids[$catid];//当前站点id$this->category = getcache('category_content_'.$siteid,'commons');//当前站点id下所有栏目的详细配置信息}if($catid && $this->category[$catid]['child']) {//当前栏目是否存在子栏目$catids_str = $this->category[$catid]['arrchildid'];//当前栏目下所有子栏目id，包括当前栏目自身id$pos = strpos($catids_str,',')+1;$catids_str = substr($catids_str, $pos);//当前栏目下所有子栏目id，不包括当前栏目自身id$sql = "`catid` IN ($catids_str) AND ";//拼接sql}  elseif($catid && !$this->category[$catid]['child']) {//如果当前栏目不存在子栏目$sql = "`catid` = '$catid' AND ";}if($thumb) $sql .= "`thumb` = '1' AND ";//有缩略图的情况if(isset($data['where'])) $sql .= $data['where'].' AND ';//pc标签的where属性：一般情况下没有此属性if(isset($data['expiration']) && $data['expiration']==1) $sql .= '(`expiration` >= \''.SYS_TIME.'\' OR `expiration` = \'0\' ) AND ';$sql .= "`posid` = '$posid' AND `siteid` = '".$siteid."'";//拼接sql$pos_arr = $this->position->select($sql, '*', $data['limit'],$order);//查询v9_position_data表if(!empty($pos_arr)) {foreach ($pos_arr as $info) {//循环查询到的v9_position_data表中的记录$key = $info['catid'].'-'.$info['id'];//格式:栏目id-文章id $array[$key] = string2array($info['data']);//将v9_position_data表中data字段的值转换为数组$array[$key]['url'] = go($info['catid'],$info['id']);//url链接地址$array[$key]['id'] = $info['id'];//文章id$array[$key]['catid'] = $info['catid'];//栏目id$array[$key]['listorder'] = $info['listorder'];//排序}}return $array;}/** * 可视化标签，主要用于在后台可视化的对pc标签进行编辑 */public function pc_tag() {$positionlist = getcache('position','commons');$sites = pc_base::load_app_class('sites','admin');$sitelist = $sites->pc_tag_list();foreach ($positionlist as $_v) if($_v['siteid'] == get_siteid() || $_v['siteid'] == 0) $poslist[$_v['posid']] = $_v['name'];return array('action'=>array('lists'=>L('list','', 'content'),'position'=>L('position','', 'content'), 'category'=>L('subcat', '', 'content'), 'relation'=>L('related_articles', '', 'content'), 'hits'=>L('top', '', 'content')),'lists'=>array('catid'=>array('name'=>L('catid', '', 'content'),'htmltype'=>'input_select_category','data'=>array('type'=>0),'validator'=>array('min'=>1)),'order'=>array('name'=>L('sort', '', 'content'), 'htmltype'=>'select','data'=>array('id DESC'=>L('id_desc', '', 'content'), 'updatetime DESC'=>L('updatetime_desc', '', 'content'), 'listorder ASC'=>L('listorder_asc', '', 'content'))),'thumb'=>array('name'=>L('thumb', '', 'content'), 'htmltype'=>'radio','data'=>array('0'=>L('all_list', '', 'content'), '1'=>L('thumb_list', '', 'content'))),'moreinfo'=>array('name'=>L('moreinfo', '', 'content'), 'htmltype'=>'radio', 'data'=>array('1'=>L('yes'), '0'=>L('no')))),'position'=>array('posid'=>array('name'=>L('posid', '', 'content'),'htmltype'=>'input_select','data'=>$poslist,'validator'=>array('min'=>1)),'catid'=>array('name'=>L('catid', '', 'content'),'htmltype'=>'input_select_category','data'=>array('type'=>0),'validator'=>array('min'=>0)),'thumb'=>array('name'=>L('thumb', '', 'content'), 'htmltype'=>'radio','data'=>array('0'=>L('all_list', '', 'content'), '1'=>L('thumb_list', '', 'content'))),'order'=>array('name'=>L('sort', '', 'content'), 'htmltype'=>'select','data'=>array('listorder DESC'=>L('listorder_desc', '', 'content'),'listorder ASC'=>L('listorder_asc', '', 'content'),'id DESC'=>L('id_desc', '', 'content'))),),'category'=>array('siteid'=>array('name'=>L('siteid'), 'htmltype'=>'input_select', 'data'=>$sitelist),'catid'=>array('name'=>L('catid', '', 'content'), 'htmltype'=>'input_select_category', 'data'=>array('type'=>0))),'relation'=>array('catid'=>array('name'=>L('catid', '', 'content'), 'htmltype'=>'input_select_category', 'data'=>array('type'=>0), 'validator'=>array('min'=>1)),'order'=>array('name'=>L('sort', '', 'content'), 'htmltype'=>'select','data'=>array('id DESC'=>L('id_desc', '', 'content'), 'updatetime DESC'=>L('updatetime_desc', '', 'content'), 'listorder ASC'=>L('listorder_asc', '', 'content'))),'relation'=>array('name'=>L('relevant_articles_id', '', 'content'), 'htmltype'=>'input'),'keywords'=>array('name'=>L('key_word', '', 'content'), 'htmltype'=>'input')),'hits'=>array('catid'=>array('name'=>L('catid', '', 'content'), 'htmltype'=>'input_select_category', 'data'=>array('type'=>0), 'validator'=>array('min'=>1)),'day'=>array('name'=>L('day_select', '', 'content'), 'htmltype'=>'input', 'data'=>array('type'=>0)),),);}}