converting Your Classes to strings

[bertrc]

https://www.php.net/manual/en/function.var-export.php

class Printable1{
    public $testone;
    public $testtwo;
    public function __toString(){
        return(var_export($this,TRUE));
    }
}
$a = new Printable1;
$a->testone = 5;
$a->testtwo = 'foo';
var_dump($a);

the function __toString() it doesn't return anything I found some examples in the php documentation but I don't know how to use this function.
the var_export() function prints out all the attribute values in the class

   public function __toString(){
        return(var_export($this,TRUE));
    }

this code I found in php documention examples

 $a = new Printable1;
$a->testone = 5;
$a->testtwo = 'foo';
var_dump($a);

[bertrc]

<?php

class Printable{
    function __toString() :string {
     return 'String';
    }
}
$p = new Printable;
echo $p;
echo "<br>";

class Printable1{
    public $testone;
    public $testtwo;
    public function __toString(){
        return(var_export($this,TRUE));
    }
}
$a = new Printable1;
//$a->testone = 5;
//$a->testtwo = 'foo';
//var_dump($a);
echo $a;

I think the function __toStringg is working well I am new with oop and functions