Different Scopes for reading and writing properties

example1.php

<?php

class Foo 
{
    // when there are two visibility declarations following one another
    // the first one describes reading, the second one writing.
    // If it's only one declaration it is used for reading *and* writing
    // So this can be read publicly but only this class can write to the property.
    public private int $int;
    
    public function __construct(int $int)
    {
        $this->int = $int;
    }
}

$foo = new Foo(12);
echo $foo->int // 12

$foo->int = 13 // Fatal Error or Exception

example2.php

<?php

class Bar
{
    private public int $int;
    
    public function setValue(int $int) : void
    {
        $this->int = $int;
    }
    
    public function getValue() : int
    {
        return $this->int;
    }
}

$bar = new Bar();

$bar->setValue(13);

$bar->getValue(); // 12

$bar->int = 12;

echo $bar->int // Fatal Error or Exception as reading is only possible from within the instance

echo $bar->getValue() // 12
  
// Should it be possible to allow reading or writing only from the outside but *not* from the inside?