【实战】如何在 WordPress 编辑器里添加“下一页”分页按钮

不少WordPress朋友总喜欢给长一点的文章进行分页，但是默认情况下，在WordPress的编辑器中，是没有显示“下一页”按钮的，每次都要手动添加分页代码 <!--nextpage-->是一件非常费力的事，其实，我们只要在当前主题的 functions.php 添加下面的代码，就可以显示“下一页”按钮啦。

1. <span class="co4">/**</span>

2. <span class="co4">?* 在 WordPress 编辑器添加“下一页”按钮</span>

3. <span class="co4">?* http://www.wpdaxue.com/add-next-page-button-wordpress-post-editor.html</span>

4. <span class="co4">?*/</span>

5. add_filter<span class="br0">(</span><span class="st_h">'mce_buttons'</span><span class="sy0">,</span><span class="st_h">'wpdaxue_add_next_page_button'</span><span class="br0">)</span><span class="sy0">;</span>

6. <span class="kw2">function</span> wpdaxue_add_next_page_button<span class="br0">(</span><span class="re0">$mce_buttons</span><span class="br0">)</span> <span class="br0">{</span>

7. 	<span class="re0">$pos</span> <span class="sy0">=</span> <span class="kw3">array_search</span><span class="br0">(</span><span class="st_h">'wp_more'</span><span class="sy0">,</span><span class="re0">$mce_buttons</span><span class="sy0">,</span><span class="kw4">true</span><span class="br0">)</span><span class="sy0">;</span>

8. 	<span class="kw1">if</span> <span class="br0">(</span><span class="re0">$pos</span> <span class="sy0">!==</span> <span class="kw4">false</span><span class="br0">)</span> <span class="br0">{</span>

9. 		<span class="re0">$tmp_buttons</span> <span class="sy0">=</span> <span class="kw3">array_slice</span><span class="br0">(</span><span class="re0">$mce_buttons</span><span class="sy0">,</span> <span class="nu0">0</span><span class="sy0">,</span> <span class="re0">$pos</span><span class="sy0">+</span><span class="nu0">1</span><span class="br0">)</span><span class="sy0">;</span>

10. 		<span class="re0">$tmp_buttons</span><span class="br0">[</span><span class="br0">]</span> <span class="sy0">=</span> <span class="st_h">'wp_page'</span><span class="sy0">;</span>

11. 		<span class="re0">$mce_buttons</span> <span class="sy0">=</span> <span class="kw3">array_merge</span><span class="br0">(</span><span class="re0">$tmp_buttons</span><span class="sy0">,</span> <span class="kw3">array_slice</span><span class="br0">(</span><span class="re0">$mce_buttons</span><span class="sy0">,</span> <span class="re0">$pos</span><span class="sy0">+</span><span class="nu0">1</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span>

12. 	<span class="br0">}</span>

13. 	<span class="kw1">return</span> <span class="re0">$mce_buttons</span><span class="sy0">;</span>

14. <span class="br0">}</span>

最终效果如下图所示：

文章页面演示地址请浏览 http://www.9frc.com