Re: PHP Memory issues

Hi, regarding my own experience, the base concept is to reuse you widgets the most as you can. You can use GLOBALS or even static variables inside functions but whenever it's possible tr to reuse the sames vars or objects. For example if you have a dialog window that you will display more than one time you'd better hide it and keep it somewhere (global or static vars) and show it again when needed instead or creating a new one each time. that's one of the most annoying things in php, perhaps we could dream of a memfree function in php6 (hope is life!) regards, nathan On 5/23/06, Brian A. Stumm <bs@bs-linux.com> wrote:

If you search the list archive for a post from me about memory you will find two sample scripts one with the memory leak and one without. The change to using global (reused) variables as opposed to creating new on the fly with each function call is exactly what fixed my problem. I dont *think* I have any memory issues at the moment. I've run my app for a few days at a time with my main routine being called once per second. I also stress tested the app by calling the main routine once each 50ms for 24 hour period. I noticed no increase in memory usage when testing on Linux. I've not done much memory testing on the windows side but the puter I'm using for windows would show it if it leaked. Its a celeron 333mhz with 96MB Ram running Win98SE. On Mon, 22 May 2006, Madeleine D. wrote: Andrew - I've been fighting this issue off and on for some time, w/o a lot of definitive conclusions. I am hoping for a better life in PHP-Gtk2. Something we have seen is that the leak behaves a lot differently depending on the OS. We've had minimal problems w/ any of the NT's, and a host of ones on Win98. Also, with a nod to Brian, all of our variables are global, and that doesn't appear to make much of a difference, maybe because of the size of our app. One thing I've come across recently was another developer's suggestion that setting a variable to NULL (as in: $somevar = NULL), actually released memory vs unset which, I agree, doesn't appear to do that at all. I haven't had a chance to play with this yet, so I can't say one way or the other if it works.... If you do try it, let us know if it makes a difference. Madeleine D. Andrew Buczacki wrote:

I'm working on an app and recently I've noticed that there are substantial memory leaks no matter how I maneuver in the program. It almost seems that the memory isn't being freed by PHP when variables are no longer referenced or moved out of scope. I included a sandbox program that mildly resembles my app and the problem remains. I was wondering if someone who has experience with PHP memory allocation/management could take a look at my dummy code and find a solution to this issue. I recently found out about unset() and have been fiddling around with it, but it doesn't seem to free up the memory. <?php if (!extension_loaded('gtk')) { dl( 'php_gtk.' . PHP_SHLIB_SUFFIX); } class Page1 extends GtkLabel{ var $ary; function Page1() { $this->ary = array(); for($i=0;$i<1000;$i++) $this->ary[$i]=4242424242; $this->GtkLabel("This is Page 1"); } } class Page0 extends GtkLabel{ var $ary; function Page0() { $this->ary = array(); for($i=0;$i<1000;$i++) $this->ary[$i]=4242424242; $this->GtkLabel("This is Page 0"); } } class stupidobject { var $currPage; var $win; var $box; var $button; function stupidobject() { $this->currPage=0; $this->win = &new GtkWindow(); $this->button = &new GtkButton("Toggle"); $this->box = &new GtkHBox(); $vbox = &new GtkVBox(); $vbox->pack_start($this->box); $vbox->pack_start($this->button); $startlabel = &new GtkLabel("Start"); $this->box->pack_start($startlabel); $this->button->connect("clicked", array($this, "toggle"));

//    $this->button->connect("clicked", "toggle", $this);

$this->win->add($vbox); $this->win->show_all(); } function toggle() { if($this->currPage == 1) $this->currPage = 0; else $this->currPage = 1; eval('$temp = &new Page'.$this->currPage.'();'); $child = $this->box->children(); //print_r($this->box); // print_r($child[0]); $this->box->remove($child[0]); unset($child[0]); // print_r($child[0]); //print_r($this->box); $this->box->pack_start($temp); $this->box->show_all(); } } $bob = &new stupidobject(); gtk::main(); ?>

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                                                       a8888b.
Brian A. Stumm                                        d888888b.
bs@bs-linux.com                                       8P"YP"Y88
http://www.bs-linux.com                               8|o||o|88
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