PHP替换字符串实现图片自适应屏幕实例代码

<?php$cnn=mysqli_connect("localhost","root","kz5DdksQyE","rooot");
//连接数据库$bm="set names utf8";
//商品ID$id=$_GET["id"];$sql = "SELECT * FROM `vi_items` WHERE `id` = $id";$ccc=mysqli_query($cnn,$sql);//执行代码
        //遍历一下数据库内容
        while($arr = mysqli_fetch_assoc($ccc)){            
        //获取数据库中所需字段
            $urmes =  $arr["desc"];           
             //替换无用字符串并且设置图片的宽度
            $diyic = str_replace("src=/data/upload/site/58fd01e4a1f22.png","width=100%",$urmes);           
             //修改目标字段为图片
            echo str_replace("src","src",$diyic);;
        }?>