Parse PHP regular expression to extract or replace img tag attribute_PHP tutorial

/*PHP regular extraction of any attributes in the image img tag*/
$str = '

PHP regular extraction or change of any attribute in the image img tag';

//1. Get the entire image code
preg_match('/]*?srcs*=s*('|")(.*? )\1[^>]*?/?s*>/i',$str,$match);
echo $match[0];

//2. Get width
preg_match('//i',$str,$match );
echo $match[1];

//3. Get height
preg_match('//i',$str,$match );
echo $match[1];

//4. Get src
preg_match('//i',$str,$match);
echo $match[1];

/*PHP regular replacement of any attribute in the image img tag*/
//1. Replace src="/uploads/images/20100516000.jpg" for src="/uploads/uc/images/20100516000.jpg")
print preg_replace('/()/i',"${1}uc/images/${3}",$str);
echo "

---

";

//2. Replace src="/uploads/images/20100516000.jpg" with src="/uploads/uc/images/20100516000.jpg", and omit the width and height
print preg_replace(' /(/i',"${1} $ {2}uc/images/${3}>",$str);
?>

http://www.bkjia.com/PHPjc/327894.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327894.htmlTechArticle?php /*PHP regular extraction of any attributes in the image img tag*/ $str = 'centerimg src=" /uploads/images/20100516000.jpg" height="120" width="120"br /PHP regular extraction or change of image img tag...