复制代码 代码如下:
<?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*imgs+[^>]*?srcs*=s*("|")(.*?)\1[^>]*?/?s*>/i",$str,$match);
echo $match[0];

//2、取width属性
preg_match("/<img.+(width="?d*"?).+>/i",$str,$match);
echo $match[1];

//3、取height属性
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];

//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);

?>