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POHow can I escape all code within <code></code> tags to allow people to post code?
 

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  1. POHow can I escape all code within <code></code> tags to allow people to post code?
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    <p>What I want to do is to allow users to post code if they need to, so it is viewable and it doesn't render. For example:</p> <pre><code>&lt;span&gt; &lt;div id="hkhsdfhu"&gt;&lt;/div&gt; &lt;/span&gt; &lt;h1&gt;Hello&lt;/h1&gt; </code></pre> <p>Should be turned into:</p> <pre><code>&amp;lt;span&amp;gt; &amp;lt;div id="hkhsdfhu"&amp;gt;&amp;lt;/div&amp;gt; &amp;lt;/span&amp;gt; &amp;lt;h1&amp;gt;Hello&amp;lt;/h1&amp;gt; </code></pre> <p>Only if it is wrapped in <code>&lt;code&gt;&lt;/code&gt;</code> tags. Right now I am using the following function to allow only certain HTML tags and escape any other tags:</p> <pre><code>function allowedHtml($str) { $allowed_tags = array("b", "strong", "i", "em"); $sans_tags = str_replace(array("&lt;", "&gt;"), array("&amp;lt;","&amp;gt;"), $str); $regex = sprintf("~&amp;lt;(/)?(%s)&amp;gt;~", implode("|",$allowed_tags)); $with_allowed = preg_replace($regex, "&lt;\\1\\2&gt;", $sans_tags); return $with_allowed; } </code></pre> <p>However, if a user wraps their code in <code>&lt;code&gt;&lt;/code&gt;</code> tags and it contains any of the allowed tags in my function above, those tags will render instead of being escaped. How can I make it where anything in <code>&lt;code&gt;&lt;/code&gt;</code> tags gets escaped (or just the <code>&lt;</code> and <code>&gt;</code> turned into <code>&amp;lt;</code> and <code>&amp;gt;</code>)? I know about <code>htmlentities()</code> but I don't want to do that to the whole post, only stuff inside <code>&lt;code&gt;&lt;/code&gt;</code> tags.</p> <p>Thanks in advance! </p>
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