点击图片自动下载，请问代码如何写？
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php codefunction get_extension($file){ return substr(strrchr($file, '.'), 1); } function get_name($path){ return substr(strrchr($path, '/'), 1); } function getimage($url,$filename=) { $fbufsize = 8096; $ext = get_extension($url); $filename = get_name($url); $type = array( 'gif' => 'image/gif', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'jpe' => 'image/jpeg', 'png' => 'image/png', ); $imgtype = isset($type[$ext])?$type[$ext]:die(类型不符); header('content-description: file transfer'); header('expires: 0'); header('cache-control: must-revalidate, post-check=0, pre-check=0'); header('pragma: public'); header(content-type: .$imgtype); header(content-transfer-encoding: binary); header('content-disposition: attachment; filename='.$filename.''); header(content-length: . getimagesize($url).\n\n ); $fp = fopen($url,r); while(!feof($fp)) { print(fread($fp,$fbufsize)); flush(); ob_flush(); } fclose($fp); exit; } getimage(http://www.lpfrx.com/wp-content/themes/prosense/images/rss-feed-icon.jpg);