PHP正則提取或替換img標記屬性

<?php

 

/*PHP正則提取圖片img標記中的任意屬性*/

$str = '<center><img src="/uploads/images/20100516000.jpg" height="120" width="120"><br />PHP正則提取或更改圖片img標記中的任意屬性</center>' ;

 

//一、取整個圖片代碼

preg_match( '/<\s*img\s+[^>]*?src\s*=\s*(\'|\")(.*?)\\1[^>]*?\/?\s*>/i' , $str , $match );

echo $match [0];

 

//二、取width

preg_match( '/<img.+(width=\"?\d*\"?).+>/i' , $str , $match );

echo $match [1];

 

//三、取height

preg_match( '/<img.+(height=\"?\d*\"?).+>/i' , $str , $match );

echo $match [1];

 

//四、取src

preg_match( '/<img.+src=\"?(.+\.(jpg|gif|bmp|bnp|png))\"?.+>/i' , $str , $match );

echo $match [1];

 

/*PHP正則替換圖片img標記中的任意屬性*/

//一、將src="/uploads/images/20100516000.jpg"替換爲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/>" ;

 

//二、將src="/uploads/images/20100516000.jpg"替換爲src="/uploads/uc/images/20100516000.jpg",並省去寬和高

print preg_replace( '/(<img).+(src=\"?.+)images\/(.+\.(jpg|gif|bmp|bnp|png)\"?).+>/i' ,"\${1} \${2}uc/images/\${3}>", $str );

 

?>