phpcms v9實現數據內容篩選功能，很多人都想要這個功能，今天我就講一下我是怎麼實現phpcms v9數據內容篩選功能的。
先來看圖：
注意：此教程目前只適用於動態頁面，並且可能有些不完善的地方，因爲數據是直接讀取SQL的，所以會把同模型的其他欄目數據調用出來。所以建議單獨新建一個模型。
添加字段：
後臺 --> 內容 --> 內容相關設置 --> 模型管理 --> 文章模型 --> 字段管理 --> 添加字段
如下圖示例
添加自定義函數：
將以下代碼添加到 phpcms/libs/functions/extention.func.php 文件
/**
* extention.func.php 用戶自定義函數庫
*
* @copyright (C) 2005-2010 PHPCMS
* @license http://www.phpcms.cn/license/
* @lastmodify 2010-10-27
*/
/********************實現篩選功能************************/
/**
* 通過指定keyid形式顯示所有聯動菜單
* @param $keyid 菜單主id
* @param $linkageid 聯動菜單id,0調用頂級
* @param $modelid 模型id
* @param $fieldname 字段名稱
*/
function show_linkage($keyid, $linkageid = 0, $modelid = '', $fieldname='zone') {
$datas = $infos = $array = array();
$keyid = intval($keyid);
$linkageid = intval($linkageid);
//當前菜單id
$field_value = intval($_GET[$fieldname]);
$urlrule = structure_filters_url($fieldname,$array,1,$modelid);
if($keyid == 0) return false;
$datas = getcache($keyid,'linkage');
$infos = $datas['data'];
foreach($infos as $k=>$v){
if($v['parentid']==$field_value){
$array[$k]['name'] = $v['name'];
$array[$k]['value'] = $k;
$array[$k]['url'] = str_replace('{$'.$fieldname.'}',$k,$urlrule);
$array[$k]['menu'] = $field_value == $k ? ''.$v['name'].'' : '.$array[$k]['url'].'>'.$v['name'].'' ;
}
}
return $array;
}
function structure_filters_url($fieldname,$array=array(),$type = 1,$modelid) {
if(empty($array)) {
$array = $_GET;
} else {
$array = array_merge($_GET,$array);
}
//TODO
$fields = getcache('model_field_'.$modelid,'model');
if(is_array($fields) && !empty($fields)) {
ksort($fields);
foreach ($fields as $_v=>$_k) {
if($_k['filtertype'] || $_k['rangetype']) {
if(strpos(URLRULE,'.html') === FALSE) $urlpars .= '&'.$_v.'={$'.$_v.'}';
else $urlpars .= '-{$'.$_v.'}';
}
}
}
//後期增加僞靜態等其他url規則管理，apache僞靜態支持9個參數
if(strpos(URLRULE,'.html') === FALSE) $urlrule =APP_PATH.'index.php?m=content&c=index&a=lists&catid={$catid}'.$urlpars.'&page={$page}' ;
else $urlrule =APP_PATH.'list-{$catid}'.$urlpars.'-{$page}.html';
//根據get傳值構造URL
if (is_array($array)) foreach ($array as $_k=>$_v) {
if($_k=='page') $_v=1;
if($type == 1) if($_k==$fieldname) continue;
$_findme[] = '/{\$'.$_k.'}/';
$_replaceme[] = $_v;
}
//type 模式的時候，構造排除該字段名稱的正則
if($type==1) $filter = '(?!'.$fieldname.'.)';
$_findme[] = '/{\$'.$filter.'([a-z0-9_]+)}/';
$_replaceme[] = '';
$urlrule = preg_replace($_findme, $_replaceme, $urlrule);
return $urlrule;
}
/**
* 生成分類信息中的篩選菜單
* @param $field 字段名稱
* @param $modelid 模型ID
*/
function filters($field,$modelid,$diyarr = array()) {
$fields = getcache('model_field_'.$modelid,'model');
$options = empty($diyarr) ? explode("\n",$fields[$field]['options']) : $diyarr;
$field_value = intval($_GET[$field]);
foreach($options as $_k) {
$v = explode("|",$_k);
$k = trim($v[1]);
$option[$k]['name'] = $v[0];
$option[$k]['value'] = $k;
$option[$k]['url'] = structure_filters_url($field,array($field=>$k),2,$modelid);
$option[$k]['menu'] = $field_value == $k ? ''.$v[0].'' : '.$option[$k]['url'].'>'.$v[0].'' ;
}
$all['name'] = '全部';
$all['url'] = structure_filters_url($field,array($field=>''),2,$modelid);
$all['menu'] = $field_value == '' ? ''.$all['name'].'' : '.$all['url'].'>'.$all['name'].'';
array_unshift($option,$all);
return $option;
}
/**
* 獲取聯動菜單層級
* @param $keyid 聯動菜單分類id
* @param $linkageid 菜單id
* @param $leveltype 獲取類型 parentid 獲取父級id child 獲取時候有子欄目 arrchildid 獲取子欄目數組
*/
function get_linkage_level($keyid,$linkageid,$leveltype = 'parentid') {
$child_arr = $childs = array();
$leveltypes = array('parentid','child','arrchildid','arrchildinfo');
$datas = getcache($keyid,'linkage');
$infos = $datas['data'];
if (in_array($leveltype, $leveltypes)) {
if($leveltype == 'arrchildinfo') {
$child_arr = explode(',',$infos[$linkageid]['arrchildid']);
foreach ($child_arr as $r) {
$childs[] = $infos[$r];
}
return $childs;
} else {
return $infos[$linkageid][$leveltype];
}
}
}
// 根據linkageid遞歸到父級
function get_parent_url($modelid,$field,$linkageid=0,$array = array()){
$modelid = intval($modelid);
if(!$modelid || empty($field)) return false;
$fields = getcache('model_field_'.$modelid,'model');
$keyid = $fields[$field]['linkageid'];
$datas = getcache($keyid,'linkage');
$infos = $datas['data'];
if(empty($linkageid)){
$linkageid = intval($_GET[$field]);
if(!$linkageid) return false;
}
$urlrule = structure_filters_url($field,array(),1,$modelid);
$urlrule = str_replace('{$'.$field.'}',$infos[$linkageid]['parentid'],$urlrule);
array_unshift($array,array('name'=> $infos[$linkageid]['name'],'url'=>$urlrule));
if($infos[$linkageid]['parentid']){
return get_parent_url($modelid,$field,$infos[$linkageid]['parentid'],$array);
}
return $array;
}
/**
* 構造篩選時候的sql語句
*/
function structure_filters_sql($modelid) {
$sql = $fieldname = $min = $max = '';
$fieldvalue = array();
$modelid = intval($modelid);
$model = getcache('model','commons');
$fields = getcache('model_field_'.$modelid,'model');
$fields_key = array_keys($fields);
//TODO
$sql = '`status` = \'99\'';
foreach ($_GET as $k=>$r) {
if(in_array($k,$fields_key) && intval($r)!=0 && ($fields[$k]['filtertype'] || $fields[$k]['rangetype']|| $fields[$k]['boxtype'])) {
if($fields[$k]['formtype'] == 'linkage') {
$datas = getcache($fields[$k]['linkageid'],'linkage');
$infos = $datas['data'];
if($infos[$r]['arrchildid']) {
$sql .= ' AND `'.$k.'` in('.$infos[$r]['arrchildid'].')';
}
} elseif($fields[$k]['rangetype']) {
if(is_numeric($r)) {
$sql .=" AND `$k` = '$r'";
} else {
$fieldvalue = explode('_',$r);
$min = intval($fieldvalue[0]);
$max = $fieldvalue[1] ? intval($fieldvalue[1]) : 999999;
$sql .=" AND `$k` >= '$min' AND `$k` < '$max'";
}
}elseif($fields[$k]['boxtype']=='checkbox') {
$sql .=" AND `$k` like '%,$r,%'";
} else {
$sql .=" AND `$k` = '$r'";
}
}
}
// echo $sql;
return $sql;
}
/**
* 分頁，如去掉則分頁會有問題
*/
function makeurlrule() {
if(strpos(URLRULE,'.html') === FALSE) {
return url_par('page={$'.'page}');
}
else {
$url = preg_replace('/-[0-9]+.html$/','-{$page}.html',get_url());
return $url;
}
}
/********************實現前臺輸出“選項名稱”功能************************/
/**
* 根據box類型字段獲取顯示名稱
* @param $field 字段名稱
* @param $value 字段值
* @param $modelid 字段所在模型id
*/
function box($field, $value, $modelid='') {
$fields = getcache('model_field_'.$modelid,'model');
extract(string2array($fields[$field]['setting']));
$options = explode("\n",$fields[$field]['options']);
foreach($options as $_k) {
$v = explode("|",$_k);
$k = trim($v[1]);
$option[$k] = $v[0];
}
$string = '';
switch($fields[$field]['boxtype']) {
case 'radio':
$string = $option[$value];
break;
case 'checkbox':
$value_arr = explode(',',$value);
foreach($value_arr as $_v) {
if($_v) $string .= $option[$_v].' 、';
}
break;
case 'select':
$string = $option[$value];
break;
case 'multiple':
$value_arr = explode(',',$value);
foreach($value_arr as $_v) {
if($_v) $string .= $option[$_v].' 、';
}
break;
}
return $string;
}
?>（注：makeurlrule函數對分頁是否能傳遞相關參數很重要！）
第三步：前臺模板調用
{php $sql = structure_filters_sql($modelid);}
{php $urlrule = makeurlrule()}
{pc:content action="lists" catid="$catid" where="$sql" modelid="$modelid" num="10" page="$page" moreinfo="1" urlrule="$urlrule" return="data" }
{loop $data $r}
........
{/loop}
{/pc}第一個問題:list條件下加入where後其他條件失效的問題
之前的一篇文章：解決lists標籤中，加上where後其他條件失效的問題，其他條件失效了，如catid，thumb等等，也就是無法獲取當前欄目的信息，而是把整個欄目下的所有文章都調用出來了！
打開/phpcms/modules/content/classes/目錄下的content_tag.class.php這個文件，把下面的代碼（大概第63行）
if(isset($data['where'])) {
$sql = $data['where'];
} else {
$thumb = intval($data['thumb']) ? " AND thumb != ''" : '';
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)".$thumb;
} else {
$sql = "status=99 AND catid='$catid'".$thumb;
}
}替換爲下面的代碼即可
if(isset($data['where'])) {
$where = (isset($data['where'])&&(!empty($data['where'])))?' AND '.$data['where']:'';
$thumb = intval($data['thumb']) ? " AND thumb != ''" : '';
if($this->category[$catid]['child']) {
$catids_str = $this->category[$catid]['arrchildid'];
$pos = strpos($catids_str,',')+1;
$catids_str = substr($catids_str, $pos);
$sql = "status=99".$where." AND catid IN ($catids_str)".$thumb;
} else {
$sql = "status=99".$where." AND catid='$catid'".$thumb;
}
} else {
$thumb = intval($data['thumb']) ? " AND thumb != ''" : '';
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)".$thumb;
} else {
$sql = "status=99 AND catid='$catid'".$thumb;
}
}其實主要的修改思路是$where參數中並不包含當前欄目的id值，所以在$sql增加獲取相關id的參數
第二個問題：分頁數量不對
通過研究緩存得知，調用分頁總數的函數是：
$content_total = $content_tag->count(array('catid'=>$catid,'where'=>$sql,'modelid'=>$modelid,'moreinfo'=>'1','limit'=>$offset.",".$pagesize,'action'=>'lists',));通過這個，找到phpcms\modules\content\classes\content_tag.class.php大致36-56行，count函數如下：
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);
}
}改爲：
public function count($data) {
if($data['action'] == 'lists') {
$catid = intval($data['catid']);
$catids_str = $this->category[$catid]['arrchildid'];
if(!$this->set_modelid($catid)) return false;
if(isset($data['where'])) {
$sql = $data['where'];
if($this->category[$catid]['child']) {
$catids_str = $this->category[$catid]['arrchildid'];
$pos = strpos($catids_str,',')+1;
$catids_str = substr($catids_str, $pos);
$sql = $sql." AND catid IN ($catids_str)";
} else {
$sql = $sql." AND catid='$catid'";
}
} 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);
}
}你會發現，分頁統計的修改原理仍然是$where條件下，沒有傳入當前欄目id這個參數！
大功告成，這樣既然正常分頁傳參，也能正常獲取當前欄目信息，獲取的信息總數也正確了