Re: note 26720 added to function.include

Done it. It is kind of long. I wonder whether others will bare with the note because it is also our policy not to get the articles in but little *notes*. Thanks for all, Bogdan -- Maxim Maletsky maxim@php.net On 10 Nov 2002 17:34:41 -0000 mgv@fx.ro wrote: > I'm trying to design an elegant include dependency structure for a large project. My idea was using return() in libraries if some dependency wasn't loaded, and have an include manager parse the result and first include the dependency and then *retry* loading the original file after including the dependencies. To my unpleasant surprise, class definitions below the return() statement were loaded by PHP even if the return() did execute above it! The code below the return statement didn't run though, but since the class definition was loaded, retrying to load the same file resulted in a PHP error saying that I'm trying to duplicate a class! > > For instance: > --- myFile.php --- > <? > include("myLib.php"); > if (class_exists("myclass")) { > echo("It's defined!"); > } > ?> > > --- myLib.php --- > <? > return(1); > echo("Whoaa! return() didn't do a thing!"); > class myClass > { > function myClass() {} > } > ?> > > Executing myFile.php *will* echo "It's defined!" but won't echo "Whoaa! return() didn't do a thing!" > > To further complicate things, functions will exhibit the same behaviour, and extending classes of previously defined classes will also be defined. Extending classes which haven't been previously defined however will not be defined. > > The explanation is simple: PHP 4 allows defining functions and classes *after* the code which uses them, so PHP must first read class and function definition in every script, and only then will it execute the code. > > Here's a page demonstrating this behaviour with a more extended version of the files listed above (actual sources also listed): https://bogdan.lanifex.com/PHP_include_test/myFile.php > -- > http://www.php.net/manual/en/function.include.php > http://master.php.net/manage/user-notes.php?action=edit+26720 > http://master.php.net/manage/user-notes.php?action=delete+26720 > http://master.php.net/manage/user-notes.php?action=reject+26720 > > > -- > PHP Notes Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php >