how to fix Undefined variable: data on laravel view - php

Question

I am trying to send variable with data from a function to laravel front page view and i get Undefined variable: data (View: C:\xampp\htdocs\laravelproject\resources\views\process-url.blade.php).
This is my code and web.php routes.
web.php
Route::get('/', [welcomechecker::class, 'getfrontpage']);
Route::post('process-url', [welcomechecker::class, 'saveformdata']);
welcomechecker.php controller
class welcomechecker extends Controller
{
function getfrontpage(){
return view('welcome');
}
function saveformdata(Request $request){
$client = new Client();
$data = [];
$url = $request->url; //getting value from ajax $url = $request->url;
$wp = $url.'/'.'wp-admin';
$website = $client->request('GET', $url);
$html = $website->html();
//Check if cms is wordpress
$cms = '';
if($this->isWordPress($wp, $html) == 'WordPress'){
$cms = 'WordPress';
$data['cms'] = 'WordPress';
}
return view('process-url', compact('data'));
}
view blade: process-url.blade.php
#foreach($data as $student)
{{$student->cms}}
#endforeach
front page view blade: welcome.blade.php
<div class="display-content alert-success" >
#include('process-url')
</div>
application.js having ajax code
jQuery(document).ready(function(){
$(document).ajaxStart(function(){
$("#wait").css("display", "block");
});
$(document).ajaxComplete(function(){
$("#wait").css("display", "none");
});
jQuery('#ajaxsubmit').click(function(e){
e.preventDefault();
jQuery('.alert').show();
$.ajaxSetup({
headers: {
'X-CSRF-TOKEN': $('meta[name="_token"]').attr('content')
}
});
jQuery.ajax({
url: 'process-url',
type: 'POST',
data: {
url: jQuery('#enter_url').val()
},
success: function(result){
console.log(result);
jQuery('.display-content').html(result.success).fadeIn(700);
// jQuery('.display- content').html(result.success).fadeIn(700).fadeOut(5000);
}});
});
});
Someone please help me to identify what i am doing wrong. I am trying to submit the variable data to the process-url blade view which is routed to the saveformdata() on the web.php. The error occurs in process-url.blade.php at the data variable. The saveformdata function has a whole lot of code than what i actually put here the whole idea is that it returns an array of data from a scraping tool which i want to display on a table on process-url blade

Answer 1

Of course you will get Undefined Variable error when you are trying to include a blade file that is waiting for an array $data which is only passed to the view when you hit the route process-url. Also it is really, really bad practice to return a view after a POST request. Anyways, to solve your error (because that's what you actually want) you can do the following:
Pass the $data to the welcome page view and remove it from the process-url view
function getfrontpage(){
return view('welcome', [
'data' => ['Balloon Fight', 'Donkey Kong', 'Excitebike']
]);
}
function saveformdata(){
return view('process-url');
}
Pass the $data array from the welcome view to the process-url view through #include
<div class="display-content alert-success" >
#include('process-url', ['data' => $data])
</div>
Your error now disappeared. Your code still makes no sense, but this is what you wanted.

Answer 2

In the first URL you show a welcome blade file and it includes process-url blade without data variable
you should pass data variable in getfrontpage function like saveformdata
and the include directive pass variable to child blade
function getfrontpage(){
$data = ['Balloon Fight', 'Donkey Kong', 'Excitebike'];
return view('welcome', compact('data'));
}
and data variable array type that student will show every element in the array
#foreach($data as $student)
{{$student}}
#endforeach