php – 如何正则表达式字符<和>替换像<和>在标签？

$textToScan = '<pre title="language-markup">
    <code>
        <div title="item_content item_view_content" itemprop="articleBody">
            abc
        </div>
    </code>
</pre>';


// the regex pattern (case insensitive & multiline
$search = "~<code>(.*?)</code>~is";

// first look for all CODE tags and their content
preg_match_all($search,$textToScan,$matches);
//print_r($matches);

// now replace all the CODE tags and their content with a htmlspecialchars() content
foreach($matches[1] as $match){
    $replace = htmlspecialchars($match);
    // now replace the previously found CODE block
    $textToScan = str_replace($match,$replace,$textToScan);
}

// output result
echo $textToScan;

输出：

<pre title="language-markup">
    <code>
        &lt;div title=&quot;item_content item_view_content&quot; itemprop=&quot;articleBody&quot;&gt;
            abc
        &lt;/div&gt;
    </code>
</pre>