wordpress 条件判断标签及用法大全 wordpress筛选功能

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mob64ca14092155 2024-03-06 08:15:55

我们经常在网上看到一些网站，拥有多重筛选功能。例如一些房产网站上，就会经常使用多条件筛选功能，方便用户进行筛选房源。效果如下图：

wordpress 条件判断标签及用法大全 wordpress筛选功能_数组

自己做网站时，如何制作这样的多条件筛选功能呢？下面学做网站论坛就来介绍一下这种多条件筛选功能制作方法。

方法/步骤

创建自定义分类，增加多个筛选条件。复制下面的代码，你可以直接复制粘贴到functions.php文件中。

//给post创建四个自定义分类法
     
 add_action
     (\
     'init\', \'ashu_post_type\');
 function ashu_post_type() {
   register_taxonomy(
     \'province\',
     \'post\',
     array(
       \'label\' => \'省\',
       \'rewrite\' => array( \'slug\' => \'province\' ),
       \'hierarchical\' => true
     )
   );
   register_taxonomy(
     \'city\',
     \'post\',
     array(
       \'label\' => \'市\',
       \'rewrite\' => array( \'slug\' => \'city\' ),
       \'hierarchical\' => true
     )
   );
   register_taxonomy(
     \'genre\',
     \'post\',
     array(
       \'label\' => \'类型\',
       \'rewrite\' => array( \'slug\' => \'genre\' ),
       \'hierarchical\' => true
     )
   );
   register_taxonomy(
     \'price\',
     \'post\',
     array(
       \'label\' => \'价格\',
       \'rewrite\' => array( \'slug\' => \'price\' ),
       \'hierarchical\' => true
     )
   );
 }

添加完以上代码后，应该在后台左侧菜单会多出四个自定义分类法：
在自己网站的主题文件夹下面建立一个page-sift.php文件，这个文件将作为筛选页面的模板文件。
添加重写规则，使得wordpress 网站多条件筛选功能页面也可以伪静态。将下列代码存放到 include/rewrite.php文件中：

//获取筛选页面的Url
     
function ashuwp_sift_link
     (
     )
     {
     
   
     return home_url
     (
     )
     .
     "/sift"
     ;
     
}
     
/*
 *添加query变量
 */
     
function ashuwp_query_vars
     (
     $public_query_vars
     ) 
     {
     
     
     $public_query_vars
     [
     ] 
     = 
     'ashuwp_page'
     ;
     
     
     $public_query_vars
     [
     ] 
     = 
     'condition'
     ;
     
     
     return 
     $public_query_vars
     ;
     
}
     
/*
 *sift页面的重写规则,三种url：
 *ashuwp.com/sift   ashuwp.com/sift/0_0_0_0/    ashuwp.com/sift/0_0_0_0/page/2
 */
     
function ashuwp_rewrite_rules
     ( 
     $wp_rewrite 
     )
     {
     
   
     $new_rules 
     = 
     array
     (
     
     
     'sift/?$' 
     => 
     'index.php?ashuwp_page=sift'
     ,
     
     
     'sift/([^/]+)/?$' 
     => 
     'index.php?ashuwp_page=sift&condition='
     .
     $wp_rewrite
     ->
     preg_index
     (
     1
     )
     ,
     
     
     'sift/([^/]+)/page/?([0-9]{1,})/?$' 
     => 
     'index.php?ashuwp_page=sift&condition='
     .
     $wp_rewrite
     ->
     preg_index
     (
     1
     )
     .
     '&paged='
     .
     $wp_rewrite
     ->
     preg_index
     (
     2
     )
     
   
     )
     ;
     
   
     $wp_rewrite
     ->
     rules 
     = 
     $new_rules 
     + 
     $wp_rewrite
     ->
     rules
     ;
     
}
     
/*
 *载入模板规则
 *用page-sift.php作为筛选页面的模板文件
 */
     
function ashuwp_template_redirect
     (
     )
     {
     
   
     global 
     $wp
     ,
     $wp_query
     ,
     $wp_rewrite
     ;
     
   
     if
     ( 
     !
     isset
     (
     $wp_query
     ->
     query_vars
     [
     'ashuwp_page'
     ]
     ) 
     )
     
     
     return
     ;
     
   
     $reditect_page 
     =  
     $wp_query
     ->
     query_vars
     [
     'ashuwp_page'
     ]
     ;
     
   
     if 
     (
     $reditect_page 
     == 
     "sift"
     )
     {
     
     
     include
     (get_template_directory
     (
     )
     .
     '/page-sift.php'
     )
     ;
     
     
     die
     (
     )
     ;
     
   
     }
     
}
     
/*
 *更新重写规则
 *激活主题的时候
 */
     
function ashuwp_flush_rewrite_rules
     (
     ) 
     {
     
   
     global 
     $pagenow
     , 
     $wp_rewrite
     ;
     
   
     if 
     ( 
     'themes.php' 
     == 
     $pagenow 
     && 
     isset
     ( 
     $_GET
     [
     'activated'
     ] 
     ) 
     )
     
     
     $wp_rewrite
     ->
     flush_rules
     (
     )
     ;
     
}
     
 add_action
     ( 
     'load-themes.php'
     , 
     'ashuwp_flush_rewrite_rules' 
     )
     ;
     
 add_action
     (
     'generate_rewrite_rules'
     , 
     'ashuwp_rewrite_rules' 
     )
     ;
     
 add_action
     (
     'query_vars'
     , 
     'ashuwp_query_vars'
     )
     ;
     
 add_action
     (
     "template_redirect"
     , 
     'ashuwp_template_redirect'
     )
     ;

将下面代码存放在步骤三新建的page-sift.php文件中；

<!DOCTYPE html>
     
<html lang="zh-CN">
     
<head>
     
<meta charset="UTF-8">
     
<title>筛选页面教程
     </title>
     
<link rel='stylesheet' id='ashuwp-style-css'  href='<?php echo get_stylesheet_uri(); ?>' type='text/css' media='all' />
     
</head>
     
<body>
     
<div id="site-page">
     
<div id="header">
     
<h1 id="logo">
     
  
     <a href="http://www.treework.cn">treework.cn
     </a>
     
</h1>
     
<h2 class="align-cenetr">阿树工作室--筛选页面教程
     </h2>
     
</div>
     
<div class="container content">
     
<?php
     
//1.1 获取所有province分类,将id放入 $province_id数组
     
$args = array(
     
  'taxonomy'=>'province',
     
   'orderby'=>'id',
     
   'hide_empty'=>0
     
 );
     
 $province_ob = get_categories( $args );
     
 $province_id = array();
     
 foreach($province_ob as $province){
     
   $province_id[] = $province->term_id;
     
 }
     
 //1.2 获取所有city分类,将id放入 $city_id数组
     
 $args = array(
     
   'taxonomy'=>'city',
     
   'orderby'=>'id',
     
   'hide_empty'=>0
     
 );
     
 $city_ob = get_categories( $args );
     
 $city_id = array();
     
 foreach($city_ob as $city){
     
   $city_id[] = $city->term_id;
     
 }
     
 //1.3 获取所有genre分类,将id放入 $genre_id数组
     
 $args = array(
     
   'taxonomy'=>'genre',
     
   'orderby'=>'id',
     
   'hide_empty'=>0
     
 );
     
 $genre_ob = get_categories( $args );
     
 $genre_id = array();
     
 foreach($genre_ob as $genre){
     
   $genre_id[] = $genre->term_id;
     
 }
     
 //1.4 获取所有price分类,将id放入 $price_id数组
     
 $args = array(
     
   'taxonomy'=>'price',
     
   'orderby'=>'id',
     
   'hide_empty'=>0
     
 );
     
 $price_ob = get_categories( $args );
     
 $price_id = array();
     
 foreach($price_ob as $price){
     
   $price_id[] = $price->term_id;
     
 }
     
 //2 参数处理
     
 //2.1 页码
     
 $wp_query->query_vars['paged'] > 1 ? $pagenum = $wp_query->query_vars['paged'] : $pagenum = 1;
     
 /*2.2 从url中获取参数 即url中 0_0_0_0
     
 *将获取到的四个参数放入 $cons 数组中
     
 */
     
 global $wp_query;
     
 if( isset($wp_query->query_vars['condition']) 
     && $wp_query->query_vars['condition']!='' ){
     
  $condition = $wp_query->query_vars['condition'];
     
   $conditions = explode('_',$condition);
     
   $cons = array();
     
   if(isset($conditions[0])){
     
     $conditions[0] = (int)$conditions[0];
     
   }else{
     
     $conditions[0]=0;
     
   }
     
   if(isset($conditions[1])){
     
     $conditions[1] = (int)$conditions[1];
     
   }else{
     
     $conditions[1]=0;
     
   }
     
   if(isset($conditions[2])){
     
     $conditions[2] = (int)$conditions[2];
     
   }else{
     
     $conditions[2]=0;
     
   }
     
   if(isset($conditions[3])){
     
     $conditions[3] = (int)$conditions[3];
     
   }else{
     
     $conditions[3]=0;
     
   }
     
   //从url中获取到的各分类法分类ID是否真实存在
     
   if( in_array($conditions[0],$province_id) ){
     
     $cons[0]=$conditions[0];
     
   }else{
     
     $cons[0]=0;
     
   }
     
   if( in_array($conditions[1],$city_id) ){
     
     $cons[1]=$conditions[1];
     
   }else{
     
     $cons[1]=0;
     
   }
     
   if( in_array($conditions[2],$genre_id) ){
     
     $cons[2]=$conditions[2];
     
   }else{
     
     $cons[2]=0;
     
   }
     
   if( in_array($conditions[3],$price_id) ){
     
     $cons[3]=$conditions[3];
     
   }else{
     
     $cons[3]=0;
     
   }
     
   $sift_link = ashuwp_sift_link().'/'.$cons[0].'_'.$cons[1].'_'.$cons[2].'_'.$cons[3];
     
 }else{
     
   $cons = array(0,0,0,0);
     
   $sift_link = ashuwp_sift_link().'/0_0_0_0';
     
 }
     
 ?>
     
<div class="sift_query">
     
<div class="sift_cons">
     
<div class="sift_li">
     
<span>省：
     </span>
     
<a <?php if($cons[0]==0){ echo 'class="current"'; } ?> href="
     <?php echo ashuwp_sift_link(); ?>/0_
     <?php echo $cons[1];?>_
     <?php echo $cons[2];?>_
     <?php echo $cons[3];?>/">不限
     </a>
     
<?php
     
foreach( $province_ob as $province ){
     
?>
     
   
     <a href="<?php echo ashuwp_sift_link(); ?>/
     <?php echo $province->term_id; ?>_
     <?php echo $cons[1]; ?>_
     <?php echo $cons[2]; ?>_
     <?php echo $cons[3];?>" 
     <?php if($cons[0] == $province->term_id){ echo 'class="current"'; } ?>>
     <?php echo $province->name; ?>
     </a>
     
<?php } ?>
     
</div>
     
<div class="sift_li"><span>市：
     </span><a <?php if($cons[1] == 0){ echo 'class="current"'; } ?> href="
     <?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0];?>_0_
     <?php echo $cons[2]; ?>_
     <?php echo $cons[3];?>/">不限
     </a>
     
<?php
     
foreach( $city_ob as $city ){ ?>
     
     
     <a href="<?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0]; ?>_
     <?php echo $city->term_id; ?>_
     <?php echo $cons[2]; ?>_
     <?php echo $cons[3];?>" 
     <?php if($cons[1] == $city->term_id){ echo 'class="current"'; } ?>>
     <?php echo $city->name; ?>
     </a>
     
<?php } ?>
     
</div>
     
<div class="sift_li"><span>类型：
     </span><a <?php if($cons[2] == 0){ echo 'class="current"'; } ?> href="
     <?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0];?>_
     <?php echo $cons[1]; ?>_0_
     <?php echo $cons[3];?>/">不限
     </a>
     
<?php
     
foreach( $genre_ob as $genre ){ ?>
     
     
     <a href="<?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0]; ?>_
     <?php echo $cons[1]; ?>_
     <?php echo $genre->term_id; ?>_
     <?php echo $cons[3];?>" 
     <?php if($cons[2] == $genre->term_id){ echo 'class="current"'; } ?>>
     <?php echo $genre->name; ?>
     </a>
     
<?php } ?>
     
</div>
     
<div class="sift_li"><span>价格：
     </span><a <?php if($cons[3] == 0){ echo 'class="current"'; } ?> href="
     <?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0];?>_
     <?php echo $cons[1]; ?>_
     <?php echo $cons[2]; ?>_0/">不限
     </a>
     
<?php
     
foreach( $price_ob as $price ){ ?>
     
     
     <a href="<?php echo ashuwp_sift_link(); ?>/
     <?php echo $cons[0]; ?>_
     <?php echo $cons[1]; ?>_
     <?php echo $cons[2]; ?>_
     <?php echo $price->term_id; ?>" 
     <?php if($cons[3] == $price->term_id){ echo 'class="current"'; } ?>>
     <?php echo $price->name; ?>
     </a>
     
<?php } ?>
     
</div>
     
</div>
     
<?php
     
//代码来源：学做网站论坛https://www.xuewangzhan.com/ 将获取到的参数组合为query_posts的参数
     
$tax_query = array(
     
    'relation'=> 'AND',
     
 );
     
 //province
     
 if( $cons[0] != 0 ){
     
     $tax_query[] = array(
     
         'taxonomy'=>'province',
     
         'field'=>'id',
     
         'terms'=>$cons[0]
     
     );
     
 }
     
 //city
     
 if( $cons[1] != 0 ){
     
     $tax_query[] = array(
     
         'taxonomy'=>'city',
     
         'field'=>'id',
     
         'terms'=>$cons[1]
     
     );
     
 }
     
 //genre
     
 if( $cons[2] != 0 ){
     
     $tax_query[] = array(
     
         'taxonomy'=>'genre',
     
         'field'=>'id',
     
         'terms'=>$cons[2]
     
     );
     
 }
     
 //price
     
 if( $cons[3] != 0 ){
     
     $tax_query[] = array(
     
         'taxonomy'=>'price',
     
         'field'=>'id',
     
         'terms'=>$cons[3]
     
     );
     
 }
     
 $args = array(
     
     'paged' => $pagenum,
     
     'tax_query'=> $tax_query
     
 );
     
 global $ashuwp_query;
     
 $ashuwp_query = new WP_Query( $args );
     
 ?>
     
<div class="query_count">共找到
     <?php echo $ashuwp_query->found_posts;?>个符合条件的内容
     </div>
     
</div>
     
<?php
     
if($ashuwp_query->have_posts()) : ?>
     
<div id="post_list">
     
<?php while($ashuwp_query->have_posts()) : $ashuwp_query->the_post(); ?>
     
<div class="post">
     
   
     <a href="<?php the_permalink();?>">
     <?php the_title();?></a>
     
</div>
     
<?php endwhile;?>
     
</div>
     
<?php endif; ?>
     
<div id="ashuwp_page">
     
<?php
     
$pagination = paginate_links( array(
     
  'base' => $links.'/page/%#%',
     
   'format' => '/page/%#%',
     
   'prev_text' => '上一页',
     
   'next_text' => '下一页',
     
   'total' => $ashuwp_query->max_num_pages,
     
   'current' => $pagenum
     
 ) );
     
 if ( $pagination ) {
     
     echo $pagination;
     
 }
     
 ?>
     
</div>
     
</div>
     
</div>
     <!--site-page-->
     
<div id="footer">
     
<div class="container">
     
<p>网站底部
     </p>
     
</div>
     
</div>
     
</body>
     
</html>