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获取当前分类下的所有子分类

2019-08-22 3 min read # WordPress # PHP

一般用于taxonomy分类页面，比如产品products，下面有a这个分类，a下面有a-1,a-2,a-3...

如何在进入a分类这个页面的时候，输出这个a下面的子分类？

解决思路:
1.首先通过get_categories获取所有分类的slug和id

$test = get_categories("taxonomy=product&hide_empty=0");
						$cats=array(); 
						foreach($test as $tmpcat){
							if($tmpcat->parent==0){
								$cats[$tmpcat->term_id]['slug']=$tmpcat->slug;
								$cats[$tmpcat->term_id]['term_id']=$tmpcat->term_id;
							}
						}

3.然后切割分组当前url，判断slug是否等于当前的url

$uri=explode('/',$_SERVER['REQUEST_URI']);

5.等于的话，再根据get_categories加上child_of=，最后foreach输出所有分类。

foreach($cats as $key=>$val){
							if($cats[$key]['slug']==$uri[2]){
								$id = $cats[$key]['term_id'];
								$cate = get_categories("depth=0&hide_empty=0&title_li=&orderby=ID&order=ASC&taxonomy=product&child_of=$id");
								foreach ($cate as $key => $value) {?>
									<div class="swiper-slide">
										<li class="cat-item<?php if($value->slug == $uri[3]){ echo ' current-cat';}?>"><a href="/products/<?php echo $uri[2];?>/<?php echo $value->slug; ?>/"><?php echo $value->name;?></a></li>
									</div>
								<?php }
							}
						}

完整的

<?php 
						$test = get_categories("taxonomy=product&hide_empty=0");
						$cats=array(); 
						foreach($test as $tmpcat){
							if($tmpcat->parent==0){
								$cats[$tmpcat->term_id]['slug']=$tmpcat->slug;
								$cats[$tmpcat->term_id]['term_id']=$tmpcat->term_id;
							}
						}
						foreach($cats as $key=>$val){
							if($cats[$key]['slug']==$uri[2]){
								$id = $cats[$key]['term_id'];
								$cate = get_categories("depth=0&hide_empty=0&title_li=&orderby=ID&order=ASC&taxonomy=product&child_of=$id");
								foreach ($cate as $key => $value) {?>
									<div class="swiper-slide">
										<li class="cat-item<?php if($value->slug == $uri[3]){ echo ' current-cat';}?>"><a href="/products/<?php echo $uri[2];?>/<?php echo $value->slug; ?>/"><?php echo $value->name;?></a></li>
									</div>
								<?php }
							}
						}
						?>
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