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