Preprocess Comment Content in?WordPress

Ive put a great amount of effort into making sure the?comment system on this blog is fast?and feature-filled. ?The comment system is AJAX-based so you dont need to worry about page refreshes. ?You can also post links to GitHub gists, CodeP

I’ve put a great amount of effort into making sure the?comment system on this blog is fast?and feature-filled. ?The comment system is AJAX-based so you don’t need to worry about page refreshes. ?You can also post links to GitHub gists, CodePen pens, and JSFiddle fiddles and see them rendered within the comment. ?Those tasks I accomplish?after a comment has been registered in the?system. ?But what if you want to?modify comment content before it is processed, and subsequently marked as SPAM or scrubbed? ?That’s super easy with WordPress hooks!

The PHP

the <code>preprocess_comment hook allows us to get at the comment data before it is processed. ?here is how i use this hook, wrapping?<code>`text` strings in <code><code> elements and encoding angle characters in <code><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false;">&lt;/code&gt;?elements:&lt;/p&gt; &lt;pre class=&quot;brush:php;toolbar:false;&quot;&gt;// Manage comment submissions function preprocess_new_comment($commentdata) { // Replace `code` with code $commentdata['comment_content'] = preg_replace(&quot;/`(.*)`/Um&quot;, &quot;$1&quot;, $commentdata['comment_content']); // Ensure that code inside pre's is allowed preg_match_all(&quot;/(.*)&lt;\/pre&gt;/&quot;, $commentdata['comment_content'], $pre_matches); // $2 foreach($pre_matches as $match) { $immediate_match = str_replace(array('&lt;', '&gt;'), array('&lt;', '&gt;'), $match[2]); $commentdata['comment_content'] = str_replace($match[2], $immediate_match, $commentdata['comment_content']); } // Return return $commentdata; } add_action('preprocess_comment', 'preprocess_new_comment'); </pre>

</div> <p>This snippet?should be added to functions.php, as you would expect of a WordPress theme enhancement.</p> <p>I love the WordPress hook system — it makes the CMS incredibly powerful and?customizable. ?I also use this hook to prevent WordPress comment SPAM. ?And since many users place HTML code in my comments, it’s important?I encode those angle characters properly. ?In the end, you never know what your user will submit and what each site will accept — use this?WordPress hook to take control!</p> <p></p> <div class="aritcle_card"> <a class="aritcle_card_img" href="/ai/2373"> <img src="https://img.php.cn/upload/ai_manual/001/246/273/176239923777053.png" alt="论小文"> </a> <div class="aritcle_card_info"> <a href="/ai/2373">论小文</a> <p>可靠的论文写作助手，包含11种学术写作类型，万字论文一键生成，可降重降AIGC，参考文献真实可标注，图表代码均可自定义添加。</p> <div class=""> <img src="/static/images/card_xiazai.png" alt="论小文"> <span>431</span> </div> </div> <a href="/ai/2373" class="aritcle_card_btn"> <span>查看详情</span> <img src="/static/images/cardxiayige-3.png" alt="论小文"> </a> </div> <p>Read the full article at: Preprocess Comment Content in WordPress</p> <p><img alt="Treehouse" src="http://www.68idc.cn/help/uploads/allimg/150123/0SUKb1-0.jpg"><br><img alt="Wufoo" style="max-width:90%" src="http://www.68idc.cn/help/uploads/allimg/150123/0SUIX6-1.jpg" style="max-width:90%"></p>