Mantis - Quercus
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ID: Category: Severity: Reproducibility: Date Submitted: Last Update:
3210 minor always 12-30-08 09:01 01-04-09 16:54
Reporter: ferg Platform:  
Assigned To: ferg OS:  
Priority: urgent OS Version:  
Status: closed Product Version: 4.0.0  
Product Build: Resolution: fixed  
Projection: none      
ETA: none Fixed in Version: 4.0.0  
Summary: 0003210: array reference issue
Description: (rep by koreth)

Code is something like the following, where $stack gets modified by the yystack assignment.

class A {
  public $yystack = array("a", "b");
  public $yyindex = 0;

  function bar()
  {
    $x =& $this->yystack;
  }

  function foo()
  {
    $stack = $this->yystack;

    $x = new C;
    $this->yystack[$this->yyindex++] = $x;

    return $stack;
  }
}
Steps To Reproduce:
Additional Information:
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Notes
(0003686)
ferg   
12-30-08 09:25   
php/04a8
(0003694)
ferg   
01-04-09 16:53   
php/34a9 for the specific code.

The general case is not solvable in Quercus, because PHP's references are implemented by reference count, which Quercus does not do. So there are situations where PHP will create a reference and remove it, and Quercus will create a reference, but not be able to remove the reference.

Since array copies behave differently for references vs array values, this difference between Apache PHP and Quercus will need to be resolved on a case-by-case basis.