Not sure what the point of the "Count array size" benchmark is. count() and sizeof() are exactly the same thing; one is just an alias for the other; so naturally there is won't be any significant difference. He should have compared "for($i=0;$i<sizeof($arr);$i++)" with "for($i=0, $n=sizeof($arr);$i<$n;$i++)"
Not sure the point of the "Create object by Ref". PHP 5 always creates objects by reference.
Not sure the point of the "Random number generator". There has been no need to seed the random number generator with srand() or mt_rand() since PHP 4.2. It is done automatically.
PHP 5.0.5? WTF!? If you're going to bench PHP 5, you have to use at least 5.1