function createQrcode($url) {
require_once '../extend/phpqrcode/phpqrcode.php';
$level = 'L';
$size = 10;
$name = date('YmdHis',time()).rand(1000,9999);
$if = './upload/qrcode';
if (!file_exists($if)){
mkdir($if);
}
$path = 'upload/qrcode/'.$name.'.png';
$qrCode = new \QRcode();
$qrCode->png($url, $path, $level, $size, 1);
return $path;
}
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