problem when compile .docx file from codeigniter php - php

Question

i have this simple code that generate a new .docx file from a sample with some "token" to modify
this code work in a local MAMP webserver
$template_file_name = 'template2.docx';
$rand_no = rand(111111, 999999);
$fileName = "results_" . $rand_no . ".docx";
$folder = "results";
$full_path = $folder . '/' . $fileName;
echo $full_path;
try
{
if (!file_exists($folder))
{
mkdir($folder);
}
//Copy the Template file to the Result Directory
copy($template_file_name, $full_path);
// add calss Zip Archive
$zip_val = new ZipArchive;
//Docx file is nothing but a zip file. Open this Zip File
if($zip_val->open($full_path) == true)
{
// In the Open XML Wordprocessing format content is stored.
// In the document.xml file located in the word directory.
$key_file_name = 'word/document.xml';
$message = $zip_val->getFromName($key_file_name);
$timestamp = date('d-M-Y H:i:s');
// this data Replace the placeholders with actual values
$message = str_replace("token1", "text to replace", $message);
//Replace the content with the new content created above.
$zip_val->addFromString($key_file_name, $message);
$zip_val->close();
}
echo "<script type='text/javascript'>alert('file creato');</script>";
}
catch (Exception $exc)
{
$error_message = "Error creating the Word Document";
var_dump($exc);
}
in online webserver despite the file and folder are 777 privileges ,the file was created but without my text to replace
in codeigniter i get this error:
$message = $zip_val->getFromName($key_file_name);
$zip_val->addFromString($key_file_name, $message);
$zip_val->close();
anyone can help me ?
the stranger thigs are that in webserver in local work without problem, on webserver online doesnt work
i hope in your answer
thanks a lot