wordpress 文章页调用同分类上/下一篇文章
默认调用：
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<span class="sh_symbol"><?php</span> <span class="sh_function">previous_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'上一篇: %link'</span><span class="sh_symbol">)</span> <span class="sh_symbol">?></span> <span class="sh_symbol"><?php</span> <span class="sh_function">next_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'下一篇: %link'</span><span class="sh_symbol">)</span> <span class="sh_symbol">?></span> |
当文章处于首篇或末篇时，会显示空白，但可以通过增加判断还填补空白：
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<span class="sh_symbol"><?php</span> <span class="sh_keyword">if</span> <span class="sh_symbol">(</span><span class="sh_function">get_previous_post</span><span class="sh_symbol">())</span> <span class="sh_cbracket">{</span> <span class="sh_function">previous_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'上一篇: %link'</span><span class="sh_symbol">);</span><span class="sh_cbracket">}</span> <span class=">else</span> <span class=">{</span><span class="sh_keyword">echo</span> <span class="sh_string">"已是最后文章"</span><span class="sh_symbol">;</span><span class="sh_cbracket">}</span> <span class="sh_symbol">?></span> <span class="sh_symbol"><?php</span> <span class="sh_keyword">if</span> <span class="sh_symbol">(</span><span class="sh_function">get_next_post</span><span class="sh_symbol">())</span> <span class="sh_cbracket">{</span> <span class="sh_function">next_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'下一篇: %link'</span><span class="sh_symbol">);</span><span class="sh_cbracket">}</span> <span class="sh_keyword">else</span> <span class="sh_cbracket">{</span><span class="sh_keyword">echo</span> <span class="sh_string">"已是最新文章"</span><span class="sh_symbol">;</span><span class="sh_cbracket">}</span> <span class="sh_symbol">?></span> |
经过测试虽然显示同分类下的文章，但首篇文章和末尾的文章会不显示对应的提示信息“已是最后文章”和“已是最后文章”。只要在get_previous_post()函数中指定一下文章所属分类ID便能使代码完全有效。
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<span class="sh_symbol"><?php</span> <span class="sh_variable"> $categories</span> <span class="sh_symbol">=</span> <span class="sh_function">get_the_category</span><span class="sh_symbol">();</span> <span class="sh_variable">$categoryIDS</span> <span class="sh_symbol">=</span> <span class="sh_keyword">array</span><span class="sh_symbol">();</span> <span class="sh_keyword">foreach</span> <span class="sh_symbol">(</span><span class="sh_variable">$categories</span> <span class="sh_keyword">as</span> <span class="sh_variable">$category</span><span class="sh_symbol">)</span> <span class="sh_cbracket">{</span> <span class="sh_function">array_push</span><span class="sh_symbol">(</span><span class="sh_variable">$categoryIDS</span><span class="sh_symbol">,</span> <span class="sh_variable">$category</span><span class="sh_symbol">-></span>term_id<span class="sh_symbol">);</span> <span class="sh_cbracket">}</span> <span class="sh_variable">$categoryIDS</span> <span class="sh_symbol">=</span> <span class="sh_function">implode</span><span class="sh_symbol">(</span><span class="sh_string">","</span><span class="sh_symbol">,</span> <span class="sh_variable">$categoryIDS</span><span class="sh_symbol">);</span> <span class="sh_symbol">?></span> <span class="sh_symbol"><?php</span> <span class="sh_keyword">if</span> <span class="sh_symbol">(</span><span class="sh_function">get_previous_post</span><span class="sh_symbol">(</span><span class="sh_variable">$categoryIDS</span><span class="sh_symbol">))</span> <span class="sh_cbracket">{</span> <span class="sh_function">previous_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'上一篇: %link'</span><span class="sh_symbol">,</span><span class="sh_string">'%title'</span><span class="sh_symbol">,</span>true<span class="sh_symbol">);</span><span class="sh_cbracket">}</span> <span class="sh_keyword">else</span> <span class="sh_cbracket">{</span> <span class="sh_keyword">echo</span> <span class="sh_string">"已是最后文章"</span><span class="sh_symbol">;</span><span class="sh_cbracket">}</span> <span class="sh_symbol">?></span> <span class="sh_symbol"><?php</span> <span class="sh_keyword">if</span> <span class="sh_symbol">(</span><span class="sh_function">get_next_post</span><span class="sh_symbol">(</span><span class="sh_variable">$categoryIDS</span><span class="sh_symbol">))</span> <span class="sh_cbracket">{</span> <span class="sh_function">next_post_link</span><span class="sh_symbol">(</span><span class="sh_string">'上一篇: %link'</span><span class="sh_symbol">,</span><span class="sh_string">'%title'</span><span class="sh_symbol">,</span>true<span class="sh_symbol">);</span><span class="sh_cbracket">}</span> <span class="sh_keyword">else</span> <span class="sh_cbracket">{</span> <span class="sh_keyword">echo</span> <span class="sh_string">"已是最新文章"</span><span class="sh_symbol">;</span><span class="sh_cbracket">}</span> <span class="sh_symbol">?></span> |
打开主题目录下的文章页single.php，在要显示的位置添加代码，保存文件即可。
例子：
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<div class="inner-page"> <?php $categories = get_the_category(); $categoryIDS = array(); foreach ($categories as $category) { array_push($categoryIDS, $category->term_id); } $categoryIDS = implode(",", $categoryIDS); $prev_post = get_previous_post($categoryIDS); $next_post = get_next_post($categoryIDS);?> <?php if($next_post){?><a class="iconPic inner-page-up" id="nexturl" title="<?php echo $next_post->post_title;?>" href="<?php echo get_permalink( $next_post );?>"></a><?php }?> <?php if($prev_post){?><a class="iconPic inner-page-down" id="beforurl" title="<?php echo $prev_post->post_title;?>" href="<?php echo get_permalink( $prev_post );?>"></a><?php }?> </div> |
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