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PHP5 - Including php script within class function

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  #1  
Old September 3rd, 2007, 07:42 PM
topgear24 topgear24 is offline
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PHP5 - Including php script within class function
This isn't so much a question of why something doesn't work, but rather a question of why it does work. Using PHP you can include scripts from within class functions and access the included functions globally. This surprises me, it seems to go against what I feel should occur. If someone has a sound reason why this occurs, I would appreciate it.

temp_include.php:
PHP Code:
<?php

function test_funct() {
    echo "function called";
}

?>


main script:
PHP Code:
<?php

Class ABC {
    public function __construct() {
        require_once 'temp_include.php';
    }
}

$o = new ABC();

test_funct();

?>
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  #2  
Old September 3rd, 2007, 07:59 PM
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maybe you can, but the concept is incorrect.. meaning it was not created to work this way.. and things that have not been created to work away... leads to vulnerabilities sometimes.
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Old September 3rd, 2007, 08:00 PM
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http://us2.php.net/manual/en/language.functions.php
Quote:
Originally Posted by PHP Manual
All functions and classes in PHP have the global scope - they can be called outside a function even if they were defined inside and vice versa.

All you're doing is defining a function inside a function: the fact that it's inside a class too doesn't matter.
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Old September 3rd, 2007, 08:06 PM
topgear24 topgear24 is offline
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Yeah, it seems to be somewhat common practice to include this way anyways. I took a look at the source for Smarty and their Smarty_compiler.class.php includes plugins and other files from functions of that class this way.
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Old September 3rd, 2007, 08:30 PM
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Quote:
maybe you can, but the concept is incorrect.. meaning it was not created to work this way.. and things that have not been created to work away... leads to vulnerabilities sometimes.

According to the manual it was created to work that way. If it didn't work that way it would be possible to dynamically add functions to an object; I don't know for sure but I'm pretty sure that doing something like that would requires pretty extensive design changes to the zend engine. Not that it would be a bad thing (javascript supports it and imo javascript's class system is one of the best with the exception of a few small parts of it), but I don't think PHP even could support something like that in its current state.
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Old September 3rd, 2007, 08:34 PM
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Ok, off topic question is now: Do you really need to use a class for this or are you just curious?

Chad
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Old September 3rd, 2007, 08:43 PM
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You don't need to use a class for this. The OP was commenting it was was odd that when you include a file within the scope of a class the functions in the included file are added to the global scope rather than the class scope (as they would if the methods had been hard coded into the class).
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Old September 3rd, 2007, 08:53 PM
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Quote:
Originally Posted by chadsmith729
Ok, off topic question is now: Do you really need to use a class for this or are you just curious?

Chad


For reasons I won't get into, I'm considering of setting up a plugin system into my application. So yeah, this wasn't just something that popped in my head while watching the Jays getting killed.
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Old September 3rd, 2007, 09:04 PM
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Quote:
You don't need to use a class for this. The OP was commenting it was was odd that when you include a file within the scope of a class the functions in the included file are added to the global scope rather than the class scope (as they would if the methods had been hard coded into the class).


Sorry I misunderstood chadsmith's question, I thought he was asking if you needed a class to use include ><
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Old September 3rd, 2007, 09:19 PM
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Quote:
Originally Posted by E-Oreo
According to the manual it was created to work that way. If it didn't work that way it would be possible to dynamically add functions to an object; I don't know for sure but I'm pretty sure that doing something like that would requires pretty extensive design changes to the zend engine. Not that it would be a bad thing (javascript supports it and imo javascript's class system is one of the best with the exception of a few small parts of it), but I don't think PHP even could support something like that in its current state.
hmm like I said before.. you probably can (as it looks like you can) but.. It does not sound like something I would prefer doing.. in other words.. I my self would not trust calling a function in that manner.. now using $var -> classconstfunc this way I would.
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Old September 4th, 2007, 06:53 AM
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Topgear:

Ok that's fine, I just had to question that. Because maybe there was another way that you could be doing the project that might be easier and better to maintain.

Great, have a good time and hope you find an answer.
Chad
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