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