


Regular expression to extract the value of the src attribute of the img element
本文为大家介绍如果从 img 中获取图片的链接地址 src 属性值。
要匹配的字符串:
<img src=image/ad1.gif width="128" height="36"/><img src='image/ad2.gif' width="128" height="36" />
正则表达式:
<img[\s]+src[\s]*=[\s]*((['"](?<src>[^'"]*)[\'"])|(?<src>[^\s]*))
正则匹配输出结果:
x image/ad1.gif image/ad2.gif
PHP正则提取或 img 元素的 src 属性值:
<? php /*PHP正则提取图片img标记中的任意属性*/ $str = '<center><img src="/uploads/images/20100516000.jpg" height="120" width="120"><br />PHP正则提取或更改图片img标记中的任意属性</center>'; //1、取整个图片代码 preg_match('/<\s*img\s+[^>]*?src\s*=\s*(\'|\")(.*?)\\1[^>]*?\/?\s*>/i',$str,$match); echo $match[0]; //2、取width preg_match('/<img.+(width=\"?\d*\"?).+>/i',$str,$match); echo $match[1]; //3、取height preg_match('/<img.+(height=\"?\d*\"?).+>/i',$str,$match); echo $match[1]; //4、取src preg_match('/<img.+src=\"?(.+\.(jpg|gif|bmp|bnp|png))\"?.+>/i',$str,$match); echo $match[1]; /*PHP正则替换图片img标记中的任意属性*/ //1、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/20100516000.jpg") print preg_replace('/(<img.+src=\"?.+)(images\/)(.+\.(jpg|gif|bmp|bnp|png)\"?.+>)/i',"\${1}uc/images/\${3}",$str); echo "<hr/>"; //2、将src="/uploads/images/20100516000.jpg"替换为src="/uploads/uc/images/20100516000.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); ?>
Js正则表达式提取图片地址
//正则表达式 <script language="javascript">
var a='<P><IMG src="http://bbs.cn.yimg.com/user_img/200701/31/jisuanji986_117025184198149.jpg" mce_src="http://bbs.cn.yimg.com/user_img/200701/31/jisuanji986_117025184198149.jpg"></P>'
var b=/<IMG src=\"([^\"]*?)\">/gi var s=a.match(b) for(var i= 0;i<s.length;i++) { alert(s[i]); alert(RegExp.$1) } </script>

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