PHP COM('word.application') functions and methods parameters issue - php

Question

I'm using php and new COM('word.application') to manipulate a .doc file (add and edit fields), I'm on a Windows Server 2012 R2 with apache 2.4.25 x64 and php 7.0.17 x64.
So far I made a simple code which work great, but I have an issue when using functions with multiple parameters like this one
$word->Documents[1]->Protect(3, false, 'mypassword', false, false);
I get the following error :
[Erreur] Impossible de lancer le connecteur Microsoft Office Word. : com_exception: Parameter 4: Le type ne correspond pas
Approx translation in english :
[Error] Impossible to laungh the Microsoft Office Word connector : com_exception: Parameter 4: type does not correspond
In VBA code like this it's working
ActiveDocument.Protect Type:=wdAllowOnlyFormFields, NoReset:=True
According to the doc found in VBA
t.com/en-us/library/office/aa220366(v=office.11).aspx
Parameters 2, 4 and 5 should be booleans, so I don't know why I'm getting this error. If i remove parameters 4 and 5, I get the same error but on parameter 2.
With some searches i looked at the object new VARIANT() but it didn't work too.
I have also the problem with $this->Documents1->SaveAs()
$fileName = "D:\\test.doc";
$this->Documents[1]->SaveAs($fileName);
It works.
According to the doc (https://msdn.microsoft.com/en-us/library/microsoft.office.tools.word.document.saveas(v=vs.120).aspx) I should be able to use a second parameter like this :
$fileName = "D:\\test.doc";
$fileFormat = 0;
$this->Documents[1]->SaveAs($fileName, $fileFormat);
Like this I have the error "Parameter 0: Le type ne correspond pas" (Type does not correspond).
In VBA it's working differently, maybe I'm doing something wrong ...
Much thanks if you help me :)
edit : full example code
<?php
$word = new COM("word.application") or die("Cannot create Word object");
echo "com object created<br>";
$word->Visible = false;
$word->WindowState = 2;
$word->DisplayAlerts = false;
$word->Documents->Open("D:\\test.doc");
echo "document loaded<br>";
$import = $word->Documents[1]->VBProject->VBComponents->Import("D:\\fr.mac");
$import->name = "Macrofr";
$myModule = $word->Documents[1]->VBProject->VBComponents->Import("D:\\test1.mac");
$myModule->name = "MacroInit";
$myModule2 = $word->Documents[1]->VBProject->VBComponents->Import("D:\\test2.mac");
$myModule2->name = "MacroFonction";
$myModule3 = $word->Documents[1]->VBProject->VBComponents->Import("D:\\test3.frm");
$myModule3->name = "MacroProgression";
$word->Documents[1]->Protect(3,false,'motdepasse',false,false); // (type de protection,noReset,mdp)
$word->Documents[1]->SaveAs("D:\\doc_with_macro.doc", 0);
$word->Documents[1]->Close();
echo "closing doc<br>";
$word->Quit();
$word = null;
echo "end<br>";

Answer 1

The only problem that I see in this code is related to protect function. First parameter must be VARIANT like this :
$word->Documents[1]->Protect(
new VARIANT(3, VT_I4),
false,
'Your password',
false,
true
);