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Date: Tue, 05 Jun 2007 23:10:55 +0200
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Subject: Recursive classes ... possible bug?
From: mark@cyanox.nl ("mark@cyanox.nl")

Dear internals,

I stumbled upon the following odd error message from PHP which I was not 
expecting.

Here is a small example that triggered the error with 5.2.2, 5.2.3 and a 
php5.2-200706052030 snapshot.

<?php
class class1{
  public $c2;
  function __construct($c2){
    $this->c2 = $c2;
  }
}

class class2{
  public $c1;
  function setC1($c1){
    $this->c1 = $c1;
  }
  function test(){
    echo $this == $this->c1->c2?'equals':'not equals'; // Somehow this 
if statement triggers the error.
  }
}


$tt = new class2();
$t = new class1($tt);
$tt->setC1($t);
var_dump($t);
$tt->test();
?>

I get the error:

Fatal error: Nesting level too deep - recursive dependency? in 
/home/cyanox/DEV/test_object_recursion.php on line 15

Although it is obvious that there is a recursion I think this simple 
example should work without error.

Greetings,

Mark Sanders.