PHP regular replacement problem

I am a regular comparison expert. Now there is a problem of regular replacement that I have been unable to solve. The demand is as follows:

tags in some content

<code><p style="dsfdsf">（这里有任意内容和标签）<img class="sdfdsf" src="tupian.jpg">（ 这里也有任意内容和标签）</p>
</code>

Then replace the item with this:

<code><p style="dsfdsf">（这里有任意内容和标签）（ 这里也有任意内容和标签）</p><figure><img src="tupian.jpg" /></figure>
</code>

To put it simply, img is wrapped with figure and then extracted and placed behind P. How to write it using preg_replace?