php檔案上傳時檔案名稱怎麼轉義

php檔案上傳時檔案名稱如何轉義？
php檔案上傳時檔案名稱包含%和英文單引號和英文逗號會上傳失敗，怎麼進行轉義？急！

//迴圈排除替換檔案名稱中的非法字元
$errorchar=array ("-"," ","~","!","@","#","$","%","^","&","(",")","+",","," （","）","？","！","《","》","：","；","——");
foreach($errorchar as $char)
{
    if(strpos($upload_file,$char)){
        $upload_file=str_replace($char,"_",$upload_file);
    }
}

