(1/1) ErrorException Undefined index: id in ClientController.php (line 81) - php

Question

I am not sure why I am getting this error. Here is the method in the ClientController.
protected function updateOneStudent($parameters)
{
$studentId = $parameters['id'];
return $this- >performPutRequest("https://lumenapi.juandmegon.com/students/{$studentId}", $parameters);
}
Basically I am trying to update a selected student. Below is the update form.
#extends('layouts.master')
#section('content')
<form action="{{url('/student/update')}}" method="POST" role="form">
{{ csrf_field() }}
{{method_field('PUT')}}
<legend>Create a Student</legend>
<div class="form-group">
<label for="">Name</label>
<input type="text" class="form-control" name="name" value="{{$student->name }}"required="required">
</div>
<div class="form-group">
<label for="">Address</label>
<input type="text" class="form-control" name="address" value="{{$student->address }}" required="required">
</div>
<div class="form-group">
<label for="">Phone</label>
<input type="text" class="form-control" name="phone" value="{{$student->phone }}" required="required">
</div>
<div class="form-group">
<label for="">Career</label>
<select name="career" class="form-control" required="required">
<option>Select a Career</option>
<option value="math"{{$student->career == 'math' ? 'selected' : ''}}>Math</option>
<option value="physics"{{$student->career == 'physics' ? 'selected' : ''}}>Physics</option>
<option value="engineering"{{$student->career == '' ? 'engineering' : ''}}>Engineering</option>
</select>
</div>
<button type="submit" class="btn btn-primary">Update Student</button>
</form>
#endsection

Answer 1

The request I was sending was wrong. The error was in the StudentController.
I had
public function getUpdateStudent()
{
$students = $this->obtainAllStudents;
return view('students.select-student', ['students'=> $students]);
}
It it should have been
public function getUpdateStudent()
{
$students = $this->obtainAllStudents();
return view('students.select-student', ['students'=> $students]);
}
I missed the brackets to call the getUpdateStudent. Sorry guys I did not show this code earlier.