/**
* 下载二维码到服务器
* @param string $url 图片路径
* @param string $filestring 要保存的文件名
*/
private function DownLoadPic($url,$filestring){
if($url == ""){
return false;
}
$filename = $filestring.\'.jpg\';
// 检查路径是否存在，如不存在则创建
$dir = \'./upload/qrcode/\';
if (!is_dir($dir)){
//第三个参数是“true”表示能创建多级目录，iconv防止中文目录乱码
$res=mkdir(iconv("UTF-8", "GBK", $dir),0777,true);
}
ob_start();
readfile($url);
$img=ob_get_contents();
ob_end_clean();
$size=strlen($img);
$fp2=fopen(\'./upload/qrcode/\'.$filename,"a");
if(fwrite($fp2,$img) === false){
$this->ErrorLogger(\'dolwload image falied. Error Info: 无法写入图片\'.date(\'Y-m-d H:i:s\'));
exit();
}
fclose($fp2);
return \'/upload/qrcode/\'.$filename;
}
private function ErrorLogger($errMsg){
$logger = fopen(\'./ErrorLog.txt\', \'a+\');
fwrite($logger, date(\'Y-m-d H:i:s\')." Error Info : ".$errMsg."\r\n");
}