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Date: Sun, 10 Sep 2006 16:44:20 +0200
To: "=?ISO-8859-1?Q?Terje_Sletteb=F8?=" <tslettebo@broadpark.no>
Cc: internals@lists.php.net
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Subject: Re: __autoloading and functions
From: hannes.magnusson@gmail.com ("Hannes Magnusson")

Hello Terje

What are you talking about?
--class.php--
<?php
class foo {
}

function bar() {
    print "Hello World\n";
}

--foo.php--
<?php
function __autoload($class) {
    include "class.php";
}

new foo();
bar();

print "hello world";...

-Hannes

On 9/10/06, Terje Sletteb=F8 <tslettebo@broadpark.no> wrote:
> Hi all.
>
> I don't know if this has been discussed before (I've not found it from do=
ing
> a search), but if it has, please provide me with a link to the discussion=
.
>
> __autoload() is very convenient, but it has one problem: While classes
> defined in the __autoload() function (via an include) are accessible
> globally, any functions being included are not accessible outside the
> __autoload() function, making them completely inaccessible to the rest of
> the system. This means that if you have a file containing a class, as wel=
l
> as one or more associated functions, you won't be able to use the functio=
ns,
> if the file containing the class and functions is loaded using
> autoloading...
>
> I've not found a workaround for this (except reintroducing
> include_once/require_once, which defeats the whole purpose of
> autoloading...), are others also experiencing problems with this, and if
> not, do you a) not use any functions, or b) manage some other way?
>
> Has there been considerations for solving this in some way?
>
> Example:
>
> --- email_address.php ---
>
> class EmailAddress
> {
>   public function __construct($address) { ... } // Check if string contai=
ns
> a valid email address
> ....
>   private $address;
> }
>
> function email_address($address)
> {
>   return new EmailAddress($address);
> }
>
> ---------------------------------
>
> You may then use this like:
>
> $address=3Demail_address(<some string expression>);
>
> to make the conversion to EmailAddress less "obtrusive" (simulating impli=
cit
> conversion to user-defined type).
>
> However, this doesn't work with autoloading, so you have to either manual=
ly
> include the above file, or use "new" directly:
>
> $address=3Dnew EmailAddress(<some string expression>);
>
> In other words, this function is not a candidate for making it a method.
>
> The problem in this particular example would go away if there was a way t=
o
> implicitly convert from fundamental types to user-defined types, but that=
's
> another discussion...
>
> Regards,
>
> Terje
>
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