PHP MVC Send object variable with href - php

Question

Building a school management system using only PHP and PDO - college project.
Now I'm using MVC, and I'm having trouble sending information from one view to another.
This is the View I want information from
<?php
include_once 'model/student.php';
include_once 'model/courses.php';
$selected = new Student();
$students = Student::getAllStudents();
$selected2 = new Course();
$courses = Course::getAllCourses();
?>
<div>
<div class="col-lg-6">
<span style="font-size: 24px;"> <u>Students</u> - <button style="color:black;width: 30px;height: 35px;">+</button></span>
<br>
<hr>
<?php /* this is where I have the problem, the href attribute - I'm not sure I am sending the information correctly */
foreach($students as $stu){
?> <div> Student Name: <a href='? controller=student&action=showstudent&student_id=<?php echo $stu->id ?>'> <?php echo $stu->name ?> </a></div><br>
<div> Student Phone: <?php echo $stu->phone ?> </div><br> <hr> <?php
}
?>
</div>
<div class="col-lg-6">
<span style="font-size: 24px;"> <u>Courses</u> - <button style="color:black;width: 30px;height: 35px;">+</button></span>
<br>
<hr>
<?php
foreach($courses as $cur){
echo "<span><a href='#' ><b><u><i>" .$cur->name . "</i></u></b></a></span></br><hr>";
}
?>
</div>
</div>
These are the Controller and Model
<?php
class StudentController {
public $student_model;
public function __construct() {
$this->student_model= new Student();
}
public function showstudent($id) {
$find = $this->student_model->findStudentById($id);
if($find==TRUE){
require_once 'views/pages/container/student_into_container.php';
}
else{
echo "error";
}
}
}
Model
<?php
require_once 'connection.php';
class Student{
public $name;
public $phone;
public $email;
public $img;
public $id;
public function __construct() {
}
public static function getAllStudents(){
$students = [];
$db = Db::getInstance();
$req = $db->query('SELECT id, name, phone, email, image FROM students');
$students_info = $req->fetchAll();
foreach ($students_info as $student_info){
$stu = new Student;
$stu->id = $student_info['id'];
$stu->name = $student_info['name'];
$stu->phone = $student_info['phone'];
$stu->email = $student_info['email'];
$stu->img = $student_info['image'];
array_push($students, $stu);
}
return $students;
}
public function findStudentById($id){
$db = Db::getInstance();
$req = $db->prepare('SELECT * FROM student WHERE id = :id');
$req->execute(array('id' => $id));
$student = $req->fetch();
return $student;
}
}
And this is the view I want to get the $id from a student I found
and show all his value fields - this is the student_into_container.php from the StudentController page
<?php
require_once 'connection.php'
?>
<div style="" class="">
<div class="col-lg-4 ">
<?php
require_once 'views/pages/container/student_courses_aside.php';
?>
</div>
<div style="color: black;" class="col-lg-8 blackboard ">
<div class="blackboard-container" style="margin-top:10px;font-size:36px;">
<?php foreach($students as $stu){
echo "<span> Student Name: <a href='#'>". $stu->name . "</a></span></br>";
echo "<span> Student Phone: " . $stu->phone . "</span></br> <hr>";
}
?>
</div>
</div>
</div>
Totally lost here, any help would help.
In short?
Show in once view an information sent from another view with an href attribute