Php 使用命令行AV的安全文件上载脚本中的问题

我有一个安全的文件上传功能，这是我的网站的一部分 我正在使用防病毒软件来帮助我检查用户试图上传的文件

这是我的uploadprocess.php文件

$target_tmp = "D:\avscan\u\\"; 
$file = basename( $_FILES['uploaded_file']['name']) ;
if($file != "")
$_SESSION['file'] = $file;


$target = 'C:\xampp\htdocs\ssd\Uploads\\'; 

$file_path = $target_tmp.$file;

if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) 
{

    $safe_path = escapeshellarg($file_path);

    $command = 'scancl'. $safe_path. ' --stdout';
    $out = '';
    $int = -1;

    $output = exec($command, $out, $int); 
            echo "The output is" .$output;
     echo $int;        
     exit(0);

    //Checking for Virus. 
    if ($int == 0) {

        $target = $target.$file; 
        //echo $target; exit(0);
        copy($file_path, $target); 
        $uploaded = "The file ". $_SESSION['file']. "has been uploaded";
        $clean = 'File is Clean.';
        $_SESSION['status'] = $clean;
        $_SESSION['upload'] = $uploaded;
        header("location: ../upload.php");
        exit(0);
    }
    // File is a virus.
    else {
        $mal = 'Contains Malware';
        $deny_up = "Unable to Upload Your File!";
        $_SESSION['status'] = $mal;
        $_SESSION['upload'] = $deny_up;
        header("location: ../upload.php");
        exit(0);
    }


}
else 
{
    echo "SORRY, There was a Problem Uploading Your File."; exit(0);
    $err_upload = "SORRY, There was a Problem Uploading Your File.";
    $_SESSION['err'] = err_upload;
    header("location: ../upload.php");
    exit(0);
}

它为所有文件（恶意文件和非恶意文件）打印$int值1。这是我第二次尝试使用不同的AV。现在我正在使用Avira，在使用clamscan之前

有人能给我一些提示，告诉我发生了什么事吗

---

PS系统安装在XAMPP上，如果这有什么不同

您能更具体地说明什么不起作用吗？从理论上讲，至少对于ClamAV来说，您所做的似乎很好，因为它有以下返回代码（来自man clamscan）：

也许它想记录exec调用的输出，如果您没有得到预期的退出代码，那么原因应该在输出中（比如缺少命令行标志）

RETURN CODES
       0 : No virus found.

       1 : Virus(es) found.

       2 : Some error(s) occured.