RE: [PHP] Re: some kind of "library loader" - Thanks
Go wild Arpi! Maxim Maletsky Founder, Chief Developer PHPBeginner.com (Where PHP Begins) www.PHPBeginner.com [EMAIL PROTECTED] > -Original Message- > From: Arpad Tamas [mailto:[EMAIL PROTECTED]] > Sent: Thursday, April 04, 2002 10:34 AM > To: Miguel Cruz > Cc: Maxim Maletsky; [EMAIL PROTECTED] > Subject: Re: [PHP] Re: some kind of "library loader" - Thanks > > > Ok, Thank you for your help Miguel and Maxim, I'm trying to do it by > the help of your suggestions. > > Arpi > > > > >Also, you can find out if a class was defined by calling > > > >'class_exists()'. In this way you might save something. > > > >The best way thought is what Miguel was saying: load the files > > > >conditionally with a logic. > > > > > > That's what I'm trying to do, but still searching for the logic. > > > But as I see, there's no better way of doing this other than > > > checking if the needed classes are defined before every > > > instantiation. > > > > Perhaps you can conjure up some sort of namespace scheme, and then > > use a global array to track which class files have been loaded, or > > which classes have been instantiated, or whatever it is you need to > > keep track of. > > > > In your file with a dependency: > > > > global $LOAD_STATUS; > > if (!$LOAD_STATUS['classes-db-queryops']) > > include 'lib/classes/db/queryops.php'; > > > > In lib/classes/db/queryops.php: > > > > global $LOAD_STATUS; > > $LOAD_STATUS['class-db-queryops'] = 1; > > > > Seems fairly cheap to do. > > > > miguel -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: some kind of "library loader" - Thanks
Ok, Thank you for your help Miguel and Maxim, I'm trying to do it by the help of your suggestions. Arpi > > >Also, you can find out if a class was defined by calling > > >'class_exists()'. In this way you might save something. > > >The best way thought is what Miguel was saying: load the files > > >conditionally with a logic. > > > > That's what I'm trying to do, but still searching for the logic. > > But as I see, there's no better way of doing this other than > > checking if the needed classes are defined before every > > instantiation. > > Perhaps you can conjure up some sort of namespace scheme, and then > use a global array to track which class files have been loaded, or > which classes have been instantiated, or whatever it is you need to > keep track of. > > In your file with a dependency: > > global $LOAD_STATUS; > if (!$LOAD_STATUS['classes-db-queryops']) > include 'lib/classes/db/queryops.php'; > > In lib/classes/db/queryops.php: > > global $LOAD_STATUS; > $LOAD_STATUS['class-db-queryops'] = 1; > > Seems fairly cheap to do. > > miguel -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: some kind of "library loader"
On Wed, 3 Apr 2002, Tamás Árpád wrote: > >Also, you can find out if a class was defined by calling > >'class_exists()'. In this way you might save something. > >The best way thought is what Miguel was saying: load the files > >conditionally with a logic. > That's what I'm trying to do, but still searching for the logic. > But as I see, there's no better way of doing this other than checking if the > needed classes are defined before every instantiation. Perhaps you can conjure up some sort of namespace scheme, and then use a global array to track which class files have been loaded, or which classes have been instantiated, or whatever it is you need to keep track of. In your file with a dependency: global $LOAD_STATUS; if (!$LOAD_STATUS['classes-db-queryops']) include 'lib/classes/db/queryops.php'; In lib/classes/db/queryops.php: global $LOAD_STATUS; $LOAD_STATUS['class-db-queryops'] = 1; Seems fairly cheap to do. miguel -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: some kind of "library loader"
>Have you considered simply using require_once? Yes, actually I'm using it now, but it's not enough. >Also, you can find out if a class was defined by calling >'class_exists()'. In this way you might save something. >The best way thought is what Miguel was saying: load the files >conditionally with a logic. That's what I'm trying to do, but still searching for the logic. But as I see, there's no better way of doing this other than checking if the needed classes are defined before every instantiation. Thanks for your help, Arpi -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Re: some kind of "library loader"
Have you considered simply using require_once? Also, you can find out if a class was defined by calling 'class_exists()'. In this way you might save something. The best way thought is what Miguel was saying: load the files conditionally with a logic. Sincerely, Maxim Maletsky Founder, Chief Developer PHPBeginner.com (Where PHP Begins) [EMAIL PROTECTED] www.phpbeginner.com > -Original Message- > From: Tamás Árpád [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 03, 2002 9:51 PM > To: Miguel Cruz; Maxim Maletsky > Cc: [EMAIL PROTECTED] > Subject: Re: [PHP] Re: some kind of "library loader" > > > On Thu, 4 Apr 2002, Maxim Maletsky wrote: > > > You can try to load all those classes as texts into a db and then to > execute > > > the needed ones as eval()ed strings. It could be easy for you to create > the > > > logic because the PHP code are stings and are never included but > SELECTed. > > > Not sure if this could be wise to do, just throwing out an idea. > > > > Offhand I'm guessing the payoff wouldn't be great, because you'd lose the > > benefit of PHP's own code caching. Depends on how much of this voluminous > > code actually gets used on any one run, I suppose. But why not do the same > > thing with conditional includes, and then at least let PHP cache it? > > Thanks for your suggestion Maxim and Miguel. > > Unfortunately storing code in db wouldn't solve my problem, becuse then I > still had to recognise when the classes are really needed. Now in the 52k > lines of code we just have > $x = new SomeClass(); > $y = new OtherClass(); or > $result = AnotherClass::staticMethod(); statements, and we have many of > them. > That's why I'm searching for a sollution that we can use without rewrite all > these calls with the extension of a test if the needed class's definition > was or wasn't loaded before. > So I'd like to use conditional includes, and my first thought was that > somehow I can make it with a custom error handler, but unfortunately I > realized quickly it's not that simple. > Maybe you or someone can help, If I explain my problem in a little more > detail. > We have a "portal-creator" system (like many of you, I guess), with an own > developed template system. Of course we sell it to customers who have their > own needs. They create the designs, or tell us how the site should look, and > the created templates determine what template classes are needed for > generating the pages. The template classes require other "base" classes that > are responsible for handling the db storage. > We have about 430 classes (I misscalculated it in my firts mail), and they > have many "cross reference" to each other. So it's hard to know explicitly > if a class definition is needed, except of course at every new operator, and > static method call, but there are plenty of them. > Parsing of (almost) all of the php code takes about 1,5secs on an athlon 800 > cpu, which is far from reasonable. I expect that with conditional includes > at least half of the code wouldn't get parsed on a normal site, and even > less on a smaller site. > I wrote that I tried many code caches (I sent the results in deatils in > December), but none of them - except Zend Cache - made significant speed-up > (PHP-Accelerator also gave good results for speed, but I got many errors). > Unfortunatelly Zend Cache isn't affordable for many of our client, > especially the smaller ones, who don't need many of the features of the > system, so they would benefit much from the conditional includes. > > I hope someone who had the same situation can help, or at least I get > reinforcement, that I can't by-pass the hard way (to write an if clause > before every use of a class wether it was loaded or not). > Thanks for your help, > Arpi > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: some kind of "library loader"
> On Thu, 4 Apr 2002, Maxim Maletsky wrote: > > You can try to load all those classes as texts into a db and then to execute > > the needed ones as eval()ed strings. It could be easy for you to create the > > logic because the PHP code are stings and are never included but SELECTed. > > Not sure if this could be wise to do, just throwing out an idea. > > Offhand I'm guessing the payoff wouldn't be great, because you'd lose the > benefit of PHP's own code caching. Depends on how much of this voluminous > code actually gets used on any one run, I suppose. But why not do the same > thing with conditional includes, and then at least let PHP cache it? Thanks for your suggestion Maxim and Miguel. Unfortunately storing code in db wouldn't solve my problem, becuse then I still had to recognise when the classes are really needed. Now in the 52k lines of code we just have $x = new SomeClass(); $y = new OtherClass(); or $result = AnotherClass::staticMethod(); statements, and we have many of them. That's why I'm searching for a sollution that we can use without rewrite all these calls with the extension of a test if the needed class's definition was or wasn't loaded before. So I'd like to use conditional includes, and my first thought was that somehow I can make it with a custom error handler, but unfortunately I realized quickly it's not that simple. Maybe you or someone can help, If I explain my problem in a little more detail. We have a "portal-creator" system (like many of you, I guess), with an own developed template system. Of course we sell it to customers who have their own needs. They create the designs, or tell us how the site should look, and the created templates determine what template classes are needed for generating the pages. The template classes require other "base" classes that are responsible for handling the db storage. We have about 430 classes (I misscalculated it in my firts mail), and they have many "cross reference" to each other. So it's hard to know explicitly if a class definition is needed, except of course at every new operator, and static method call, but there are plenty of them. Parsing of (almost) all of the php code takes about 1,5secs on an athlon 800 cpu, which is far from reasonable. I expect that with conditional includes at least half of the code wouldn't get parsed on a normal site, and even less on a smaller site. I wrote that I tried many code caches (I sent the results in deatils in December), but none of them - except Zend Cache - made significant speed-up (PHP-Accelerator also gave good results for speed, but I got many errors). Unfortunatelly Zend Cache isn't affordable for many of our client, especially the smaller ones, who don't need many of the features of the system, so they would benefit much from the conditional includes. I hope someone who had the same situation can help, or at least I get reinforcement, that I can't by-pass the hard way (to write an if clause before every use of a class wether it was loaded or not). Thanks for your help, Arpi -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: some kind of "library loader"
On Thu, 4 Apr 2002, Maxim Maletsky wrote: > You can try to load all those classes as texts into a db and then to execute > the needed ones as eval()ed strings. It could be easy for you to create the > logic because the PHP code are stings and are never included but SELECTed. > Not sure if this could be wise to do, just throwing out an idea. Offhand I'm guessing the payoff wouldn't be great, because you'd lose the benefit of PHP's own code caching. Depends on how much of this voluminous code actually gets used on any one run, I suppose. But why not do the same thing with conditional includes, and then at least let PHP cache it? miguel -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
