Friends, how to change the value of the $b property (add one) for each object of class T specified in the constructor of class G?

Question

PHP

class G{
  var $a;
  public function __construct(){
    $massiv=[];
    for ($i=0;$i<4;$i=$i+1){
      ${'fu'.$i} = new T;
      ${'fu'.$i}->b=rand(0,1000);
      $massiv[]=${'tree'.$i};
      }
   }
}

class T{
  var $b;	 
  var $s; 
}

Answer 1

1) var - don't use this keyword. Use public. Better yet, private.
2) encapsulation, the law of demeter. Don't change the state of objects directly. Use messages (method calls).
3) these pandemoniums with the dynamic creation of variable names are meaningless
4) the names of classes, properties, methods, and in general should be meaningful. You should be able to, I don't know, read the code out loud! and to make it clear to everyone around.

class T{
    private $b;
    private $s;

    public function __construct() 
    {
         $this->b = mt_rand(0, 1000);
         $this->s = 'foo';
    }
}

class G
{
    public function __construct(array $t) 
    {
          // ...
    }
}

$g = new G(array_map(function () {
    return new T();
}, range(1, 4));