Combination of where and where is not working - php

Question

I have a problem code beneath this line does not work! How can I let this work? where ... orWhere orWhere does filter but cumulates the queries. where ... where does not provide any result. Can someone help me?
$artworks = Artwork::where('category_id', $category)
->where('style_id', $style)
->where('technic_id', $technic)
->where('orientation', $orientation)
->get();
Here is the full code:
if (request()->category_id) {
$category = request()->category_id;
} else {
$category = 0;
}
if (request()->style_id) {
$style = request()->style_id;
} else {
$style = 0;
}
if (request()->technic_id) {
$technic = request()->technic_id;
} else {
$technic = 0;
}
if (request()->orientation_id == 'vertical') {
$orientation = 'vertical';
} else if (request()->orientation_id == 'horizontal') {
$orientation = 'horizontal';
} else {
$orientation = 0;
}
$artists = Artist::get();
$artworks = Artwork::where('category_id', $category)
->where('style_id', $style)
->where('technic_id', $technic)
->where('orientation', $orientation)
->get();
return view('frontend.index', compact('artworks', 'artists'));

Answer 1

I think you want to use OR Condition and you are mistaking it with double where. Please look below to understand properly
If you want AND condition in your query then the double where are used but if you want OR condition then you have to use orWhere
Examples:
AND condition
Query::where(condition)->where(condition)->get();
OR Conditon
Query::where(condition)->orWhere(condition)->get();

Answer 2

If you expect all of your variables to be set
Your query variables category_id, style_id, orientation_id & technic_id are being defaulted to 0 if they are not true.
Your query is fine, but you may not have the data you think you do.
Run the following at the top of this function:
print_r($request->all());
exit;
If all of your variables are optional
very procedural, basic way to achieve this:
$artists = Artist::get();
$artworks = Artwork::where('id', '>', 0);
$category_id = request()->input('category_id');
if ($category_id != '') {
$artworks->where('category_id', request()->category_id);
}
$style_id = request()->input('style_id');
if ($style_id != '') {
$artworks->where('style_id', request()->style_id);
}
$technic_id = request()->input('technic_id');
if ($technic_id != '') {
$artworks->where('technic_id', request()->technic_id);
}
$orientation_id = request()->input('orientation_id');
if ($orientation_id != '') {
$artworks->where('orientation_id', request()->orientation_id);
}
$artworks->get();
return view('frontend.index', compact('artworks', 'artists'));