复制代码 代码如下:

function grabImage($url, $filename = '') {

if($url == '') {

return false; //如果 $url 为空则返回 false;

}

$ext_name = strrchr($url, '.'); //获取图片的扩展名

if($ext_name != '.gif' && $ext_name != '.jpg' && $ext_name != '.bmp' && $ext_name != '.png') {

return false; //格式不在允许的范围

}

if($filename == '') {

$filename = time().$ext_name; //以时间戳另起名

}

//开始捕获

ob_start();

readfile($url);

$img_data = ob_get_contents();

ob_end_clean();

$size = strlen($img_data);

$local_file = fopen($filename , 'a');

fwrite($local_file, $img_data);

fclose($local_file);

return $filename;

}