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Date: Mon, 12 Apr 2004 18:29:29 -0400
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Subject: Possible resource leak?
From: sean@caedmon.net (Sean Coates)

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Hello,

I don't believe this to be a php-general question, and seems more like a 
bug, but I'm soliciting opinions before posting it as such. It _DOES_ 
seem like an internals problem, but I could be wrong, and if I am, 
please explain why.

See the attached code; it has been isolated from PEAR (core) and 
PEAR::Net_Socket.

Basically, after a certain number of iterations (Linux, PHP4.3.4 and 
4.3.6RC3, maybe others), PHP runs out of file resources.

Warning: fsockopen(): unable to connect to 192.168.100.51:80 in 
/home/sean/www/dev3/crashing_resources.php on line 51
ERROR: 24 - Too many open files

This SEEMS to be a leak (file handles are never closed?) in 
method_exists, get_classname or get_parent_classname, because if I 
remove the ShrunkenPEAR constructor (OR, the _ShrunkenPEAR method), the 
code does not fail.

Additionally, if I instanciate ShrunkenSocket as $sock = new 
ShrunkenSocket() (value instead of reference), the error is also absent. 
  The reason I'm using a reference: PEAR::HTTP_Request instanciates 
Net_Socket as such.

Also, as mentioned in a comment in the code, if I change the die to an 
echo, the script segfaults after ~65535 iterations (which seems like an 
overflow problem).

Any insight? I'm happy to post this as a bug (or move this to the PEAR 
list) if it is such.

S

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