There are no plans for this. Maybe in PHP 6.

The notices are also generated on comparison operator (==)

This code:
<?php

  class A {
    public $p;
    function __construct($ip) { $this->p = $ip; }
  }

  $x = new A(1);
  $y = $z = new A(2);

  echo '$x,$y is ' , ( ($x ==  $y) ? 'equal'            : 'not equal[right]'     ), '<br>';
  echo '$x,$y is ' , ( ($x === $y) ? 'identical'        : 'not identical[right]' ), '<br>';
  echo '$z,$y is ' , ( ($z ==  $y) ? 'equal[right]'     : 'not equal'            ), '<br>';
  echo '$z,$y is ' , ( ($z === $y) ? 'identical[right]' : 'not identical'        ), '<br>';

?>

Produces:

$x,$y is 
Notice: Object of class A could not be converted to integer in C:\www\default\test\index.php on line 11

Notice: Object of class A could not be converted to integer in C:\www\default\test\index.php on line 11
not equal[right]
$x,$y is not identical[right]
$z,$y is 
Notice: Object of class A could not be converted to integer in C:\www\default\test\index.php on line 13

Notice: Object of class A could not be converted to integer in C:\www\default\test\index.php on line 13
equal[right]
$z,$y is identical[right]


At least, please remove the notification and fix the in_array and also the array_search function (seems that both share the same algorithm - always two notices as two objects are compared) - the right solution would be to use the === operator in these functions when the needle is an object.

This bug is still about:

http://www.php.net/ChangeLog-5.php 
Changed array_search() to accept also objects as a needle. (Moriyoshi)

Using '===' instead of '==' will work, but is semantically different, right?

$a === $b : are object references the same? i.e. are $a and $b the same instance.

$a == $b : do the contents match? i.e. do all the variables in object $a have the same values as the vars in object $b.

If '==' is going to be changed to mean something else, then I think PHP5 needs an __equals() method so that object contents comparison can be accomplished.

OK, I have a "temporary" solution (because i wanted to compare the object references):

Instead of this:
  echo (in_array($x,$a)) ? 'There' : 'NOT there';

I must use this:
  echo (in_array($x,$a,TRUE)) ? 'There' : 'NOT there';

This way the PHP uses the '===' operator which is OK for me.

ad the '==' operator)
The notice of "Notice: Object of class A could not be converted to integer in..." is a bit ambiguous - I spent a day searching how to make an integer from an object. Anyway, the '==' works in PHP, but generates these notices - what if I really want to compare the objects by value?

I updated form 5.0.4 to 5.1.1 and encountered this problem.
I use == and try to compare a DOM node value with a class property.
What's the difference between these versions?

problem still evident in 5.2.1

<?php
$obj = new stdClass;
var_dump($obj == 1);
?>

correction to previous comment.. version 5.2.2