<p><img src="/thinkphp5_home/public/static/uploads/image/2016-10-09/1476004890492326.png" title="1476004890492326.png" alt="Product_Intro-juhuaxd.png-525x180.png"></p>如何通过PHP的正则表达式提取上述段落当中第一张图像的网址:
/thinkphp5_home/public/static/uploads/image/2016-10-09/1476004890492326.png