Search Laravel Using Button - laravel

Question

I want to search for data using a primary key, with PO as an example. Btw, I'm new to Laravel. Below is my code for my controller. I want to make the system go to the new page if the data that was searched exists(click on search button). If not, it will stay on the same page. Actually, I don't know whether my code is correct or not.
public function supplierindex(){
$supp_details = Supplier::where('PO','LIKE','%'.$searchPO.'%')->get();
return view ('frontend.praiBarcode.getweight')
->with('supp_details',$supp_details);
}
public function searchindex()
{
return view ('frontend.praiBarcode.getweight');
}
public function searchPO()
{
$searchPO = Supplier::where('PO','like',"%".$search."%")->get();
if (Supplier::where('PO','like',"%".$search."%")->exists()) {
return view('frontend.praiBarcode.getweight',compact('searchPO')); }
else {
return view('frontend.praiBarcode.index');
}
}
Below is my code in blade.php. However, the data does not come out on the screen.
<div class= "form-group">
#foreach ($supp_details as s)
<div style="font-size: 16px;" class="form-group row">
<label for="supp_name" class = "col-sm-2">PO</label>
<label for="supp_name" class = "col-sm-1">:</label>
<div class="col-sm-7">
<label> {{ $s->PO }}</label>
</div>
</div>
#endforeach

Answer 1

In order to pass data into the view, you have to use the second argument of the view function.
Example:
public function supplierindex(){
$supp_details = Supplier::where('PO','LIKE','%'.$searchPO.'%')->get();
return view ('frontend.praiBarcode.getweight' ,['supp_details' => $supp_details]);
}

Answer 2

You can use count() to check if query result is empty or not
public function searchPO()
{
$searchPO = Supplier::where('PO','like',"%".$search."%")->get();
$countsearchPO = $searchPO->count();
if ($countsearchPO ) {
return view('frontend.praiBarcode.getweight',compact('searchPO')); }
else {
return view('frontend.praiBarcode.index');
}
}
And in your blade your variable is stored in session
$supp_details = Session::get('supp_details');
#foreach ($supp_details as s)
<div style="font-size: 16px;" class="form-group row">
<label for="supp_name" class = "col-sm-2">PO</label>
<label for="supp_name" class = "col-sm-1">:</label>
<div class="col-sm-7">
<label> {{ $s->PO }}</label>
</div>
</div>
#endforeach