how to fix Undefined variable: data on laravel view

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 more 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.

Good code indentation would help us read the code and more importantly it will help you debug your code Take a quick look at a coding standard for your own benefit. You may be asked to amend this code in a few weeks/months and you will thank me in the end. — RiggsFolly
– RiggsFolly, Commented Jun 22, 2022 at 14:09
That's the complete code for the saveFormData method? If so, you're trying to access each $data value as an object ($student->cms) while it is a string, as it is you can just refactor $student->cms to $student and it will work. If this isn't the main problem, try to add more info on the question, mainly by adding the complete error (message & line) and explaining all the logic you have on the method that's failing. — pmcpimentel
– pmcpimentel, Commented Jun 22, 2022 at 14:13
return view('process-url', compact('data')); in here data is an array and in the blade you try and access it like it was an object — RiggsFolly
– RiggsFolly, Commented Jun 22, 2022 at 14:14

Laralex · Accepted Answer · 2022-06-22 14:21:31Z

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.

answered Jun 22, 2022 at 14:21

Laralex

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10 Comments

Djouonang Over a year ago

Hi, i want to rather send from process-url to welcome view. 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

Laralex Over a year ago

The only way you access a GET route and in the same time send a POST request to another endpoint and receive its response is through AJAX request.

Djouonang Over a year ago

Actually i am doing this through ajax

Laralex Over a year ago

Then your question is not relevant. You are showing totally different code. How are we supposed to help you?

Djouonang Over a year ago

No its not irrelevant. The basics is same. I have actually tried to send variable from m getfrontpage function and it works well. Just that, that is not what i want. it should be from saveformdata function

|

Esmail Shabayek · Accepted Answer · 2022-06-22 14:36:27Z

0

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

edited Jun 22, 2022 at 14:36

answered Jun 22, 2022 at 14:17

Esmail Shabayek

4054 silver badges13 bronze badges

3 Comments

Djouonang Over a year ago

please can you put some code for me to see.

Djouonang Over a year ago

The reason i am using saveformdata and not getfrontpage is because saveformdata actually gets data from a form scrape the data and puts the data to an array variable. saveformdata is using a post method in web.php. So now i need to send the data to process-url view and that is where i get undefined variable

Esmail Shabayek Over a year ago

But you include process-url in welcome blade file you can use @include('process-url', ['data' => [] ])

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