php正则提取html图片(img)src地址与任意属性的方法

<?phpheader("Content-Type: text/html;charset=utf-8");$str = '<div class="ui-block-a" align="center">    <a href="online-39.html" rel="external nofollow" ><img class="lazy" width="131" height="177" src="http://files.vevb.com/file_images/game/201702/2017020716154162.jpg"/>    <h3>2014年</h3></a>   </div>';$imgpreg = "/<img (.*?) src=/"(.+?)/".*?>/";preg_match($imgpreg,$str,$img);$mycount=count($img)-1; $imgval = $iim[$mycount];if(!empty($imgval)){  echo $imgval;}else{  echo 'no';}?>

<?php/*PHP正则提取图片img标记中的任意属性*/$str = '<center><img src="/uploads/images/2017020716154162.jpg" height="120" width="120"><br />PHP正则提取或更改图片img标记中的任意属性</center>';//1、取整个图片代码preg_match('/</s*img/s+[^>]*?src/s*=/s*(/'|/")(.*?)//1[^>]*?//?/s*>/i',$str,$match);echo $match[0];//2、取widthpreg_match('/<img.+(width=/"?/d*/"?).+>/i',$str,$match);echo $match[1];//3、取heightpreg_match('/<img.+(height=/"?/d*/"?).+>/i',$str,$match);echo $match[1];//4、取srcpreg_match('/<img.+src=/"?(.+/.(jpg|gif|bmp|bnp|png))/"?.+>/i',$str,$match);echo $match[1];/*PHP正则替换图片img标记中的任意属性*///1、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/2017020716154162.jpg")print preg_replace('/(<img.+src=/"?.+)(images//)(.+/.(jpg|gif|bmp|bnp|png)/"?.+>)/i',"/${1}uc/images//${3}",$str);echo "<hr/>";//2、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/2017020716154162.jpg",并省去宽和高print preg_replace('/(<img).+(src=/"?.+)images//(.+/.(jpg|gif|bmp|bnp|png)/"?).+>/i',"/${1} /${2}uc/images//${3}>",$str);?>