How to call multiple components in dependency Injection

{Code ...} here, the teacher cannot get the Student name. I use containers to pack all application components. Then, this problem occurs when application components are called between them. The application component registered earlier cannot call the application registered later, but the application registered later can call...

  room['teacher'] = $teacher;    }    function addStudents($student){        $this->room['student'] = $student;    }}class Teacher{    public $name='AAAA';    public $room=[];    function __construct($room){        $this->room = $room;    }    function sayHello(){        echo ' hello '.$this->room['student']->name.'  student '.PHP_EOL;    }}class Student{    public $name = 'BBB';    public $room=[];    function __construct($room){        $this->room = $room;    }    function sayHello(){        echo ' hello '.$this->room['teacher']->name. ' teacher '.PHP_EOL;    }}$Classroom = new Classroom;$Classroom->addTeacher( new Teacher($Classroom->room) );$Classroom->addStudents( new Student($Classroom->room) );$Classroom->room['teacher']->sayHello();$Classroom->room['student']->sayHello();

The teacher here cannot obtain the Student name.

I use containers to package all application components. Then, this problem occurs when application components are called between them.

The application component registered earlier cannot call the application registered later, but the application registered later can call the previous one.

So how can we solve this problem if we want to use the following applications?

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  room['teacher'] = $teacher;    }    function addStudents($student){        $this->room['student'] = $student;    }}class Teacher{    public $name='AAAA';    public $room=[];    function __construct($room){        $this->room = $room;    }    function sayHello(){        echo ' hello '.$this->room['student']->name.'  student '.PHP_EOL;    }}class Student{    public $name = 'BBB';    public $room=[];    function __construct($room){        $this->room = $room;    }    function sayHello(){        echo ' hello '.$this->room['teacher']->name. ' teacher '.PHP_EOL;    }}$Classroom = new Classroom;$Classroom->addTeacher( new Teacher($Classroom->room) );$Classroom->addStudents( new Student($Classroom->room) );$Classroom->room['teacher']->sayHello();$Classroom->room['student']->sayHello();

The teacher here cannot obtain the Student name.

I use containers to package all application components. Then, this problem occurs when application components are called between them.

The application component registered earlier cannot call the application registered later, but the application registered later can call the previous one.

So how can we solve this problem if we want to use the following applications?

  
  room['teacher'] = $teacher;          }          function addStudents($student){              $this->room['student'] = $student;          }  }    class Teacher{          public $name='AAAA';          public $room=[];          function __construct($room){              $this->room = $room;          }          function sayHello(){              echo ' hello '.$this->room->room['student']->name.'  sdent '.PHP_EOL;          } }  class Student{         public $name = 'BBB';         public $room=[];         function __construct($room){             $this->room = $room;         }         function sayHello(){             echo ' hello '.$this->room->room['teacher']->name. ' teacher '.PHP_EOL;         } }  $Classroom = new Classroom; $Classroom->addTeacher( new Teacher($Classroom) ); $Classroom->addStudents( new Student($Classroom) );  $Classroom->room['teacher']->sayHello(); $Classroom->room['student']->sayHello();