1 header("Content-type:text/html;charset=utf-8");
 2 $aaa = "http://upfile.cuepa.cn/data/paper/2020/09/23/20200923163055_898895_small.jpg";
 3 $str = 'sf你好 <img alt=""  title=""  hspace="0" src="http://upfile.cuepa.cn/data/paper/2020/09/23/20200923163055_898895_small.jpg" align="baseline" border="0" title=""/><img alt=""  title=""  hspace="0" src="http://upfile.cuepa.cn/data/paper/2020/09/23/20200923163055_898895_small.jpg" align="baseline" border="0" title=""/>我在这里啊';
 4 echo '这是原始内容：<br/>';
 5 echo $str.'<br/>';
 6 echo '<hr />';
 7 //过滤图片
 8 $str = preg_replace('~<[img|IMG](.*?)src="'.$aaa.'"(.*?)>~s','',$str);
 9 echo '这是过滤后的内容：<br/>';
10 echo $str;