too long

<html>
<body>
<form  method="post" enctype="multipart/form-data">
    Select file to upload:
    <input type="file" name="fileToUpload" id="fileToUpload">
    <input type="submit" value="Upload File" name="submit">
</form>
<?php
    if(isset($_POST['submit']))
    {
        if($con = mysqli_connect('localhost','root','','mooc'))
        {
            $filetemp = $_FILES['fileToUpload']['tmp_name'];
            $filename = $_FILES['fileToUpload']['name'];
            $filetype = $_FILES['fileToUpload']['type'];
        
            $filepath = "csvfiles/".$filename;
            $m=new MongoDB\Driver\Manager();
//
//          echo "Connected to database successfully.";
    //      $db=$m->test;
//          echo "database selected";

            
            

            //echo "enter";
            //echo shell_exec("python C:/xampp/Xampp/htdocs/csvseparator.py 2>&1");
            //echo "left";
            $ip = $_SERVER['REMOTE_ADDR'];
            $file1=explode(".",$filename);
            $ext=$file1[1];
            $allowed=array("bson");
            if(in_array($ext,$allowed))
            {
                move_uploaded_file($filetemp,$filepath);
                $query = "INSERT INTO csv(name,path,type,ip) VALUES('$filename','$filepath','$filetype','$ip')";
                $ros = mysqli_query($con,$query);
                echo "file uploaded";
                //echo shell_exec("mongorestore -d admin -c contents /opt/lampp/htdocs/project/production/csvfiles/contents.bson --port 27017 -u 'admin' -p 'admin123' --authenticationDatabase 'admin' 2>&1");

                //echo shell_exec("mongoexport --db admin --collection contents --fields _id,_type,abuse_flaggers,anonymous,anonymous_to_peers,at_position_list,author_id,author_username,body,closed,comment_count,comment_thread,commentable_id,course_id,created_at,endorsed,historical_abuse,last_activity_at,parent_id,parents_id,sk,thread_type,title,updated_at,visible,votes --out /opt/lampp/htdocs/project/production/csvfiles/out.csv --port 27017 -u 'admin' -p 'admin123' --authenticationDatabase 'admin' 2>&1");

                

            }
            else
            {
                echo "Upload only Bson file";
                echo "<br />";
                echo '<a href="upload1.php">Click here</a> to go back and try again';
            }
            
        }
    }
?>
</body>
</html>

I am using Ubuntu 16.04

These are my shell commands :

mongorestore -d admin -c contents /opt/lampp/htdocs/project/production/csvfiles/contents.bson --port 27017 -u 'admin' -p 'admin123' --authenticationDatabase 'admin'

mongoexport --db admin --collection contents --fields _id,_type,abuse_flaggers,anonymous,anonymous_to_peers,at_position_list,author_id,author_username,body,closed,comment_count,comment_thread,commentable_id,course_id,created_at,endorsed,historical_abuse,last_activity_at,parent_id,parents_id,sk,thread_type,title,updated_at,visible,votes --out /opt/lampp/htdocs/project/production/csvfiles/out.csv --port 27017 -u 'admin' -p 'admin123' --authenticationDatabase 'admin'

How do i get over this issue?

When I use 2>&1 along with the commands, it gives me an error as:

mongorestore: relocation error: mongorestore: symbol X509_NAME_free, version OPENSSL_1.0.0 not defined in file libcrypto.so.1.0.0 with link time reference

and

mongoexport: relocation error: mongoexport: symbol X509_NAME_free, version OPENSSL_1.0.0 not defined in file libcrypto.so.1.0.0 with link time reference

P.S: When I run the two mongo commands from my cmd window, I get the output as expected.

The commands read a bson file and output its content into a csv file and creates a new csv file. I have attached my php file. Please help me!

</div>