了解类型提示和PHP中的命名空间

Question

i don't have much intuitive knowledge on type hinting and namespaces. So i made up the following code to work with both of the concepts.I have three php pages holding three classes inside same directory.They are--

1.Student.php

2.Institution.php

3.enroll.php.

i want to use both the Student and Institution class inside the enroll class.I applied namespaces in both Student and Institution class.And use them inside enroll class.But something isn't quite right here.I am getting these errors:

Warning: The use statement with non-compound name 'Student' has no effect in C:\\xampp\\htdocs\\practice\\typehint\\enroll.php on line 2

Warning: The use statement with non-compound name 'Institute' has no effect in C:\\xampp\\htdocs\\practice\\typehint\\enroll.php on line 3

Fatal error: Class 'Student' not found in C:\\xampp\\htdocs\\practice\\typehint\\enroll.php on line 10

can anyone explain what is wrong here and how i can fix this ?

student.php

namespace Student;
 class Student{

     public $name;

     publci function __construct($value){
        $this->name=$value;
     }

 }

institute.php

namespace Institute;
   class Institute{

      public $institute;
      public function __construct($val){
         $this->institute=$val;
      }
   }

enroll.php

use Student;
use Institute;
  class enroll{

      public function __construct(Student $student,Institute $institute){
         echo $student->name.' enrolled in '.$institute->institute.' school .';
      }
  }
  $student=new Student('zami');
  $institute=new Institute('Government Laboratory High School');

  $enroll=new enroll($student,$institute);

Answer 1

You still have to include the other files first. otherwise, PHP doesn't know where to look for the namespaces you are looking for.

enroll.php:

<?php
include "student.php";
include "institute.php";
use Student;
use Institute;
  class enroll{

      public function __construct(Student $student,Institute $institute){
         echo $student->name.' enrolled in '.$institute->institute.' school .';
      }
  }
  $student=new Student('zami');
  $institute=new Institute('GLAB');

  $enroll=new enroll($student,$institute);