Description:
------------
Posted to php.general. Posted here on behalf of original bug discoverer, as I wrote a large test case for it.

PHP 5.0.2 CLI
Windows XP SP 2 with DEP excepted for PHP-CLI
  (DEP *was* a problem early, but I excepted it for php.exe)

socket_select() will fail when managing a large number of sockets. The sockets extension itself can manage a bunch, but when socket_select() is attempted with a 'read' array larger than exactly 64 sockets, it prints out the following message and dies:

Warning: socket_select(): unable to select [0]: An operation was attempted on something that is not a socket.                                                   

PHP's problem? My problem? A print_r of the array before feeding it to socket_select shows this:

Array                    
(                        
    [1] => Resource id #4
    [2] => Resource id #5
    [3] => Resource id #6
    (...)
    [64] => Resource id #67
    [65] => Resource id #68
)                          

Valid resources, I'd assume. Zero-basing the array causes the same problem. If there are more than exactly 64 sockets in the array fed to socket_select for the read parameter socket_select() will fail.

Due to lack of time I'll only submit the test case for read, but write and except might be prone to the same problem. Let's tackle one at a time.

Latest CVS was unusable as the sockets extension currently doesn't link correctly (numerous PHP startup warnings were encountered when starting php just for php -v)... The snaps I used to obtain this result were

    5.0.x-dev 200411201730 ("5.0.3-dev")
    5.1.x-dev 200411201930

Might have been misconfiguration on my end, because 5.0.x popped up a box reporting a mismatch between extensions even after I changed extension_dir to the snapshot package's extensions.

Reproduce code:
---------------
The Server
   http://labs.jed.bz/HCJ/server.php.txt

The Load Client
   http://labs.jed.bz/HCJ/load.php.txt

When executing, make sure $max_connections in the server is exactly equal to $connections in the load tester (or, if you prefer, make it one under, and telnet in to the server to make the last one).

Expected result:
----------------
...
connecting #65 of 65 ... ok
                         
waiting for spew         
Array                    
(                        
    ...
)                        
spew!                    
                         
done!                    

Actual result:
--------------
    [63] => Resource id #67                                                     
    [64] => Resource id #68                                                     
)                                                                               
                                                                                
Warning: socket_select(): unable to select [0]: An operation was attempted on something that is not a socket.                                                   
 in F:\Projects\HCJ\load.php on line 39                                         
spew!                                                                           
                                                                                
done!                          

----------------

This appeared in my debugger output while I was messing with getting a backtrace (possible in VS?). Interest you?

First-chance exception at 0x7c81eb33 in php.exe: 0x000006A6: The binding handle is invalid.

----------------

I can't recompile with debug symbols at this point, I'm unfortunately pressed for time. Perhaps someone can run it through VS and see what comes up.