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:
?php
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:
?php
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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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:
?php
class Foo
{
static $instances = 0;
function __construct()
{
Foo::$instances++;
}
function __destruct()
{
Foo::$instances--;
}
And:
function __clone()
{
Foo::$instances++;
}
Curt
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you've been hearing about. No, sir. Our model is the trapezoid!
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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] 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
[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
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:
?php
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;
--
..
| InterJinn Application Framework - http://www.interjinn.com |
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| 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
* 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:
?php
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!
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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:
?php
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.
--
..
| 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. |
`'
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
