[PHP] how to count objects instances
hi, What is best method(if it's possible) to count how many times an object is instanced in one time script call? I means that if i have a class named "Test", i what to know how many times she's called, how many copies exists etc. The idea is for monitoring in the way to optimizing the code. The method get_declared_classes() only shows only the classes included/required. Tanks -- This mail sent through Horde-Toaster (http://qmailtoaster.clikka.com/) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to count objects instances
[EMAIL PROTECTED] wrote: hi, What is best method(if it's possible) to count how many times an object is instanced in one time script call? I means that if i have a class named "Test", i what to know how many times she's called, how many copies exists etc. The idea is for monitoring in the way to optimizing the code. The method get_declared_classes() only shows only the classes included/required. There's no predefined variable or method for determining this, that I'm aware of, short of counting how many "new Test" lines you have. You could write a wrapper class for Test that kept count of the instances and returned a new object upon request... -- ---John Holmes... Amazon Wishlist: www.amazon.com/o/registry/3BEXC84AB3A5E/ php|architect: The Magazine for PHP Professionals – www.phparch.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to count objects instances
On Mon, 2004-08-23 at 20:54, John Holmes wrote: > [EMAIL PROTECTED] wrote: > > hi, > > What is best method(if it's possible) to count how many times an object is > > instanced in one time script call? > > I means that if i have a class named "Test", i what to know how many times she's > > called, how many copies exists etc. The idea is for monitoring in the way to > > optimizing the code. > > > > The method get_declared_classes() only shows only the classes included/required. > > There's no predefined variable or method for determining this, that I'm > aware of, short of counting how many "new Test" lines you have. > > You could write a wrapper class for Test that kept count of the > instances and returned a new object upon request... In PHP5: http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to count objects instances
* Thus wrote Robert Cummings:
> On Mon, 2004-08-23 at 20:54, John Holmes wrote:
> > [EMAIL PROTECTED] wrote:
> >
> > You could write a wrapper class for Test that kept count of the
> > instances and returned a new object upon request...
>
> In PHP5:
>
>
> class Foo
> {
> static $instances = 0;
>
> function __construct()
> {
> Foo::$instances++;
> }
>
> function __destruct()
> {
> Foo::$instances--;
> }
And:
function __clone()
{
Foo::$instances++;
}
Curt
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Re: [PHP] how to count objects instances
On Mon, 2004-08-23 at 20:33, Curt Zirzow wrote:
> * Thus wrote Robert Cummings:
> > On Mon, 2004-08-23 at 20:54, John Holmes wrote:
> > > [EMAIL PROTECTED] wrote:
> > >
> > > You could write a wrapper class for Test that kept count of the
> > > instances and returned a new object upon request...
> >
> > In PHP5:
> >
> > >
> > class Foo
> > {
> > static $instances = 0;
> >
> > function __construct()
> > {
> > Foo::$instances++;
> > }
> >
> > function __destruct()
> > {
> > Foo::$instances--;
> > }
>
> And:
> function __clone()
> {
> Foo::$instances++;
> }
Perfect. I hadn't thought of that :)
Cheers,
Rob.
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..
| InterJinn Application Framework - http://www.interjinn.com |
::
| An application and templating framework for PHP. Boasting |
| a powerful, scalable system for accessing system services |
| such as forms, properties, sessions, and caches. InterJinn |
| also provides an extremely flexible architecture for |
| creating re-usable components quickly and easily. |
`'
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Re: [PHP] how to count objects instances
Robert Cummings wrote:
On Mon, 2004-08-23 at 20:54, John Holmes wrote:
[EMAIL PROTECTED] wrote:
hi,
What is best method(if it's possible) to count how many times an object is
instanced in one time script call?
I means that if i have a class named "Test", i what to know how many times she's
called, how many copies exists etc. The idea is for monitoring in the way to
optimizing the code.
The method get_declared_classes() only shows only the classes included/required.
There's no predefined variable or method for determining this, that I'm
aware of, short of counting how many "new Test" lines you have.
You could write a wrapper class for Test that kept count of the
instances and returned a new object upon request...
In PHP5:
class Foo
{
static $instances = 0;
function __construct()
{
Foo::$instances++;
}
function __destruct()
{
Foo::$instances--;
}
static function getNumInstances()
{
return Foo::$instances;
}
}
$foo = new Foo();
$fee = new Foo();
echo 'Count: '.Foo::getNumInstances()."\n";
unset( $foo );
echo 'Count: '.Foo::getNumInstances()."\n";
Add this to the class as well:
public function __clone ()
{
self::$instances++; // You might as well use the "self" operator
}
--
Daniel Schierbeck
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Re: [PHP] how to count objects instances
Curt Zirzow wrote:
* Thus wrote Robert Cummings:
On Mon, 2004-08-23 at 20:54, John Holmes wrote:
[EMAIL PROTECTED] wrote:
You could write a wrapper class for Test that kept count of the
instances and returned a new object upon request...
In PHP5:
class Foo
{
static $instances = 0;
function __construct()
{
Foo::$instances++;
}
function __destruct()
{
Foo::$instances--;
}
And:
function __clone()
{
Foo::$instances++;
}
Curt
Ooops, didn't see your post, hehe...
By the way, use "self" instead of "Foo", just in case you change the
class' name.
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Daniel Schierbeck
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Re: [PHP] how to count objects instances
Thanks,
But im using php 4.3.
Quoting Curt Zirzow <[EMAIL PROTECTED]>:
> * Thus wrote Robert Cummings:
> > On Mon, 2004-08-23 at 20:54, John Holmes wrote:
> > > [EMAIL PROTECTED] wrote:
> > >
> > > You could write a wrapper class for Test that kept count of the
> > > instances and returned a new object upon request...
> >
> > In PHP5:
> >
> > >
> > class Foo
> > {
> > static $instances = 0;
> >
> > function __construct()
> > {
> > Foo::$instances++;
> > }
> >
> > function __destruct()
> > {
> > Foo::$instances--;
> > }
>
> And:
> function __clone()
> {
> Foo::$instances++;
> }
>
>
> Curt
> --
> First, let me assure you that this is not one of those shady pyramid schemes
> you've been hearing about. No, sir. Our model is the trapezoid!
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
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Re: [PHP] how to count objects instances
* Thus wrote [EMAIL PROTECTED]:
> Thanks,
> But im using php 4.3.
Then you'll have to resort to some very unstandard methods:
class foo {
var $instance_manager;
function getInstanceNum() {
return $this->instance_manager->instancesOf(__CLASS__);
}
function getInstanceName() {
return __CLASS__;
}
}
class Factory {
var $instances;
function &create($name) {
$this->instances[$name]++; // keep track of instances.
$new = new $name(); // create object
$new->instance_manager = &this; // tell instance about me
return &$new;// return value.
}
function destroy(&$obj) {
$this->instances[$this->getInstanceName()]--;
unset($obj);
}
function instancesOf($name) {
return $this->instance[$name];
}
}
$Factory = new Factory();
$o = &$Factory->Crate('foo');
echo $o->getIntanceNum();
$Factory->destroy($o);
btw, totally untested.
Curt
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[PHP] PHP Runtime Debugger (Was: [PHP] how to count objects instances)
> There's no predefined variable or method for determining this, that I'm > aware of, short of counting how many "new Test" lines you have. > > You could write a wrapper class for Test that kept count of the > instances and returned a new object upon request... A slightly more general question: are there any PHP development environments that let you do something like a core dump, to see what kind of memory usage or variable allocation you have going on? Maybe a compilation option to PHP? A search of google turns up DBG and some commercial packages, but I lack the experience with such tools to evaluate them intelligently. I've done something like what the OP is asking about, by adding a log() feature and calling it when objects are instantiated or destroyed, but it sure would be nice to see something like this built-in. I'm a gdb beginner, but I'm willing to learn. I realize that this is a fairly complex problem compounded by the fact that PHP is generally a library used within an apache child process. Any thoughts? - michal migurski- contact info and pgp key: sf/cahttp://mike.teczno.com/contact.html -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
