ID: 6333
Comment by: jon at fuck dot org
Reported By: ewdafa at ewdafa dot b0rk dot co dot uk
Status: Closed
Bug Type: Performance problem
Operating System: linux-2.2.16
PHP Version: 4.0.1pl2
New Comment:
create_function() is operating as it should, yes, but there is still no
way to delete a function during the execution of a script. for silly
things like irc bots it gets handy to be able to rehash your function
set on the fly, which is possible, but you lose track of the functions
you have created thus far when you redefine your array of hashes.
i suggest a delete_function($foo) that removes the created function
from memory and renders the hash in $foo useless.
another useful one would be redefine_function(&$foo,
create_function(...)) that shortcuts the delete/create step for us.
this comes in handy for silly things like irc bots, when you have a
large set of functions to be rehashed without losing your connection to
the server by terminating the script.
Previous Comments:
------------------------------------------------------------------------
[2003-12-26 18:27:54] josh at mykoala dot com
It's been said that this is just how the function works,
but it seems as though destroying allocations for an
anonymous function when redefining to the same variable
would be the way to handle it. Example:
for ($i=0; $i<10; $i++) {
$echoit = create_function('$wha', 'echo $wha;');
echo memory_get_usage();
$echoit(" on iteration: #$i\n");
}
How else can you dynamically modify function or code
without reloading a script?
------------------------------------------------------------------------
[2000-09-07 11:43:23] [EMAIL PROTECTED]
This isn't a bug but how it works. Each create_function() call creates
a new unique function. So obviously if you define zillions in an
infinite loop you'll run out of memory.
------------------------------------------------------------------------
[2000-08-24 09:57:38] ewdafa at ewdafa dot b0rk dot co dot uk
the following code causes PHP to continually eat more and more memory
where it should be destroying the old reference for $func.
while(1) {
$array = array();
$func = create_function('', "return 0;");
$array[] = $func;
$func = 0;
echo "sleeping for a second.\n";
sleep(1);
}
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=6333&edit=1
