php - 如何在标记 中将正则表达式字符 < 和 > 替换为 < 和 >？

Question

我有一个像下面这样的字符串:

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

在<code></code> tag 我要替换所有字符 <和 >与 <和 > .我该怎么办？

示例:<code> &lt; div &gt;<code> .

如果您有任何想法，请告诉我。谢谢大家。

Answer 1

尝试以下解决方案:

$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>