PHP - Need Help Generate Csv On Server

Following a tutorial on udemy, i tried to learn the very basics of mvc structure. I built the same project on my local server and it worked without giving me any error. but when i tried it on live server. its not working as it should. not showing any error. I tried to figure out the problem and found that for every page loading, it stops at the same line in my main.php file.

<?php require($view); ?>

starting from the above line. it stops. i came here to share my problem but i am unable to upload my files here. if there is a way to upload and share my files, please guide. zip file size of the whole project is 31.6 kb

if(missingInformation) {echo(0);}
else {
   session_start();
   $_SESSION['_xfr']=$_POST;
   exec('/usr/bin/php -q /path/to/send_fax.php '.session_id().' >/dev/null &');
   echo(1);
}

session_id($argv[1]);//Set by parent
session_start();
$data=$_SESSION['_xfr'];

$doc_list=null;
foreach ($data['documents'] AS $doc)
{
    if(ctype_alnum($doc['id']))
    {
        $file='/some/tmp/directory/'.$doc['id'];
        if(!file_exists($file))
        {
            $url='http://machine.WebServer.com/index.php?task=displayDocument&id='.$doc['id'].'&x='.hash('sha256','displayDocument'.$doc['id'].'secretCodeWhichOnlyWebServerAndFaxServerKnow');
            $cmd='wget -O '.$file.' '.escapeshellarg($url);
            exec($cmd);
        }    
        $doc_list.=' '.$file;
    }
    exit('invalid document');
}

//Send the fax...

//Send another CURL request to the WebServer similar to the wget giving the fax status.
exit;

stdClass Object
(
    [rules] => stdClass Object
        (
            [email] => stdClass Object
                (
                    [required] => 1
                    [email] => 1
                    [remote] => stdClass Object
                        (
                            [url] => check-email.php
                            [type] => post
                            [data] => stdClass Object
                                (
                                    [username] => function() {return $( '#username' ).val();}
                                )
                        )
                )
        )

    [messages] => stdClass Object
        (
            [email] => stdClass Object
                (
                    [required] => an email is required
                )
        )
)

exit('var myObj='.json_encode($myObj));

<?php

// Where the file is going to be placed
$target_path = "uploads/";

/* Add the original filename to our target path.
Result is "uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
$_FILES['uploadedfile']['tmp_name'];

?>


<?php


$file_type = $_FILES['userfile']['type'];
$file_name = $_FILES['userfile']['name'];
$file_ext = strtolower(substr($file_name,strrpos($file_name,".")));

if (!in_array($file_type, $FILE_MIMES) && !in_array($file_ext, $FILE_EXTS) )
$message = "Sorry, $file_name($file_type) is not allowed to be uploaded.";
else
$message = do_upload_function_here($upload_path_here, $upload_ur_upload_url_herel);
?>
<?php



$target_path = "uploads/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded. Here is the link to your file: <a href=uploads/". basename( $_FILES['uploadedfile']['name']). ">". basename( $_FILES['uploadedfile']['name'])."</a>";

} else{
echo "There was an error uploading the file, please try again!";
}

?>

<?php
ob_start();
session_start();
 
if(isset($_POST['login']))
{
	$email = $_POST['email'];
	$password = $_POST['pass'];
	 
	 require "connection.php";
	 
	$emails = mysqli_real_escape_string($con, $email);
	$query = "SELECT id, name, email, password, salt FROM users WHERE email = '$emails';";
	 
	$result = mysqli_query($con, $query);
	 
	if(mysqli_num_rows($result) == 0) // User not found. So, redirect to login_form again.
	{
		echo "<script>alert(\"User does not exist!\")</script>";
	}
	 
	$userData = mysqli_fetch_array($result, MYSQLI_ASSOC);
	$hash = hash('sha256', $userData['salt'] . hash('sha256', $password) );
	 
	if($hash != $userData['password'])
	{
		echo "<script>alert(\"Incorrect Password!\")</script>";
	}else{ 
		session_regenerate_id();
		$_SESSION['sess_user_id'] = $userData['id'];
		$_SESSION['sess_name'] = $userData['name'];
		session_write_close();
		header('Location: home.php?user=');
	}
}
ob_flush();
?>
<!DOCTYPE html>
<form name="login" method="post" action="<?php echo $_SERVER[PHP_SELF] . '?name=' . $userData['name'];?>">