[PHP-DEV] Function/Constant autoloading
Hi, Maybe this topic occured already, then sorry when I'm wasting your time, but I'm wondering, why there is no autoloading for functions and (namespace)constants. When a class is not found, then an userland function is called. Thus I don't see a reason, why something like this doesn't exists for functions and (namespace)constants too, because using them is quite uncomfortable right now compared to classes and the decision _how_ to load them would be on the developers-side anyway. Sebastian Krebs -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Function/Constant autoloading
Hi: maybe Yaf_Loader can be used for meet this requirement. it's a internal autoload function: Each namespace separator is converted to a DIRECTORY_SEPARATOR when loading from the file system. Each _ character in the CLASS NAME is converted to a DIRECTORY_SEPARATOR. The _ character has no special meaning in the namespace. The fully-qualified namespace and class is suffixed with .php when loading from the file system. As examples: \Doctrine\Common\IsolatedClassLoader = /path/to/project/lib/vendor/Doctrine/Common/IsolatedClassLoader.php \namespace\package\Class_Name = /path/to/project/lib/vendor/namespace/package/Class/Name.php \namespace\package_name\Class_Name = /path/to/project/lib/vendor/namespace/package_name/Class/Name.php http://pecl.php.net/package/Yaf thanks 2011/7/26 Sebastian Krebs sebastian.krebs.ber...@googlemail.com: Hi, Maybe this topic occured already, then sorry when I'm wasting your time, but I'm wondering, why there is no autoloading for functions and (namespace)constants. When a class is not found, then an userland function is called. Thus I don't see a reason, why something like this doesn't exists for functions and (namespace)constants too, because using them is quite uncomfortable right now compared to classes and the decision _how_ to load them would be on the developers-side anyway. Sebastian Krebs -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php -- Laruence Xinchen Hui http://www.laruence.com/ -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Function/Constant autoloading
There is lazy loading for functions via apc.lazy_functions (although I've not properly tested this yet). That doesn't require any userspace code changes. For define() I'm not aware of anything allowing for lazy loading constants (define() is just a function call). However there are a few approaches for avoiding define(), you could look at apc_define_constants(), http://pecl.php.net/package/hidef and http://pecl.php.net/package/chdb, you could also switch to class constants and lazy load your classes. I haven't On Tue, Jul 26, 2011 at 5:18 PM, Sebastian Krebs sebastian.krebs.ber...@googlemail.com wrote: Hi, Maybe this topic occured already, then sorry when I'm wasting your time, but I'm wondering, why there is no autoloading for functions and (namespace)constants. When a class is not found, then an userland function is called. Thus I don't see a reason, why something like this doesn't exists for functions and (namespace)constants too, because using them is quite uncomfortable right now compared to classes and the decision _how_ to load them would be on the developers-side anyway. Sebastian Krebs -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Function/Constant autoloading
Hi,
thanks for your reply, but I'm not talking about class loading (because
thats already possible). I'm talking about autoloading of userspace
functions and constants
// /path/to/my/functions.php
namespace my\functions;
const THING = 'I am constant!';
function helloWorld () {
echo hello World;
}
// /path/to/some/other/file.php
namespace foo;
use my\functions;
functions\helloWorld(); // fail!
echo functions\THING;
Am 26.07.2011 10:27, schrieb Laruence:
Hi:
maybe Yaf_Loader can be used for meet this requirement.
it's a internal autoload function:
Each namespace separator is converted to a DIRECTORY_SEPARATOR when
loading from the file system.
Each _ character in the CLASS NAME is converted to a
DIRECTORY_SEPARATOR. The _ character has no special meaning in the
namespace.
The fully-qualified namespace and class is suffixed with .php when
loading from the file system.
As examples:
\Doctrine\Common\IsolatedClassLoader =
/path/to/project/lib/vendor/Doctrine/Common/IsolatedClassLoader.php
\namespace\package\Class_Name =
/path/to/project/lib/vendor/namespace/package/Class/Name.php
\namespace\package_name\Class_Name =
/path/to/project/lib/vendor/namespace/package_name/Class/Name.php
http://pecl.php.net/package/Yaf
thanks
2011/7/26 Sebastian Krebssebastian.krebs.ber...@googlemail.com:
Hi,
Maybe this topic occured already, then sorry when I'm wasting your time, but
I'm wondering, why there is no autoloading for functions and
(namespace)constants.
When a class is not found, then an userland function is called. Thus I don't
see a reason, why something like this doesn't exists for functions and
(namespace)constants too, because using them is quite uncomfortable right
now compared to classes and the decision _how_ to load them would be on the
developers-side anyway.
Sebastian Krebs
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Re: [PHP-DEV] Function/Constant autoloading
Hi, Thanks for your reply Am 26.07.2011 10:35, schrieb Nathaniel Catchpole: There is lazy loading for functions via apc.lazy_functions (although I've not properly tested this yet). That doesn't require any userspace code changes. As far as I can see this is for built-in functions only. The problem I see is, that APC cannot know, where my functions are located and therefore cannot load it without userspace help. For define() I'm not aware of anything allowing for lazy loading constants (define() is just a function call). However there are a few approaches for avoiding define(), you could look at apc_define_constants(), http://pecl.php.net/package/hidef and http://pecl.php.net/package/chdb, you could also switch to class constants and lazy load your classes. Maybe my description were a little bit misleading: I was talking about especially namespace constant like namespace my\ns; const FOO = 'BAR'; I know I can use class constants instead (as well as I can use static methods instead of functions), but that makes me feel, that functions and namespace constants are more or less useless now. I haven't On Tue, Jul 26, 2011 at 5:18 PM, Sebastian Krebs sebastian.krebs.ber...@googlemail.com wrote: Hi, Maybe this topic occured already, then sorry when I'm wasting your time, but I'm wondering, why there is no autoloading for functions and (namespace)constants. When a class is not found, then an userland function is called. Thus I don't see a reason, why something like this doesn't exists for functions and (namespace)constants too, because using them is quite uncomfortable right now compared to classes and the decision _how_ to load them would be on the developers-side anyway. Sebastian Krebs -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Function/Constant autoloading
On Tue, Jul 26, 2011 at 10:39 AM, Sebastian Krebs
sebastian.krebs.ber...@googlemail.com wrote:
Hi,
thanks for your reply, but I'm not talking about class loading (because
thats already possible). I'm talking about autoloading of userspace
functions and constants
// /path/to/my/functions.php
namespace my\functions;
const THING = 'I am constant!';
function helloWorld () {
echo hello World;
}
// /path/to/some/other/file.php
namespace foo;
use my\functions;
functions\helloWorld(); // fail!
echo functions\THING;
I think it's pretty clear what are you after.
autofunc with a patch:
http://www.mail-archive.com/internals@lists.php.net/msg43983.html
__autodefine proposal and rfc:
http://www.mail-archive.com/internals@lists.php.net/msg48986.html
https://wiki.php.net/rfc/autodefine?s[]=autodefine
from the replies I think that the idea didn't got traction from the core devs.
--
Ferenc Kovács
@Tyr43l - http://tyrael.hu
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Re: [PHP-DEV] Function/Constant autoloading
As far as I can see this is for built-in functions only. The problem I see is, that APC cannot know, where my functions are located and therefore cannot load it without userspace help. No it includes userspace functions. My knowledge of APC internals is very weak, but more or less when you load an opcode into APC, the function definitions have to be copied over. This setting changes that so the copying happens when the function is actually called. It should be easy enough to test by generating a file that has a few hundred or so functions defined, then profiling a require of the file before and after with xhprof or similar (should see a memory improvement - or at least, I can see more memory taken up the more functions are defined in the file without this setting, didn't try with it yet). I had missed the PHP 5.3 constant change so my mistake, although that's good to know. Nat
Re: [PHP-DEV] Function/Constant autoloading
Hi,
Thanks, that looks similar to what I'm looking for. It doesn't seem,
that any of the reply is really against autoloading of functions (and
maybe constants), but are against the given implementations (because
they are built on top of the outdated __autoload() function), what
brings me back to my overall question: Why it doesn't exists, but
autoloading of classes exists? That makes me feel, that, since classes
exists, functions (and the youngest children namespace constants) are
the unloved children of the multiparadigma approach.
Just to make an example, what goes on in my mind:
// register-autoload signature
spl_autoload_register($callback, $type = SPL_AUTOLOAD_CLASS);
// register an autoloader
spl_autoload_register(function ($name, $type) use ($myLoader) {
switch ($type) {
case SPL_AUTOLOAD_CLASS:
return $myLoader-loadClass($name);
break;
case SPL_AUTOLOAD_FUNCTION:
return $myLoader-loadFunction($name);
break;
case SPL_AUTOLOAD_CONSTANT:
return $myLoader-loadConstant($name);
break;
}
}, SPL_AUTOLOAD_CLASS | SPL_AUTOLOAD_FUNCTION | SPL_AUTOLOAD_CONSTANT);
class-only-autoloader can simply ignore the second argument `$type`,
thus I don't see any BC-break.
Am 26.07.2011 10:53, schrieb Ferenc Kovacs:
On Tue, Jul 26, 2011 at 10:39 AM, Sebastian Krebs
sebastian.krebs.ber...@googlemail.com wrote:
Hi,
thanks for your reply, but I'm not talking about class loading (because
thats already possible). I'm talking about autoloading of userspace
functions and constants
// /path/to/my/functions.php
namespace my\functions;
const THING = 'I am constant!';
function helloWorld () {
echo hello World;
}
// /path/to/some/other/file.php
namespace foo;
use my\functions;
functions\helloWorld(); // fail!
echo functions\THING;
I think it's pretty clear what are you after.
autofunc with a patch:
http://www.mail-archive.com/internals@lists.php.net/msg43983.html
__autodefine proposal and rfc:
http://www.mail-archive.com/internals@lists.php.net/msg48986.html
https://wiki.php.net/rfc/autodefine?s[]=autodefine
from the replies I think that the idea didn't got traction from the core devs.
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