[PHP] static functions and array_map - why not allowed?
Why can't I use static functions in array_map?
Example:
?php
class Dummy
{
static public function T($a)
{
echo T called with $a\n;
return $a+2;
}
}
function t($a)
{
echo t called with $a\n;
return $a*2;
}
echo 'invoking Dummy::T works fine : ', Dummy::T(3),\n;
var_dump(array_map('t',array(1,2)));
var_dump(array_map('Dummy::T',array(1,2)));
?
Marc
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Re: [PHP] static functions and array_map - why not allowed?
Marc Weber wrote:
Why can't I use static functions in array_map?
Example:
?php
class Dummy
{
static public function T($a)
{
echo T called with $a\n;
return $a+2;
}
}
function t($a)
{
echo t called with $a\n;
return $a*2;
}
echo 'invoking Dummy::T works fine : ', Dummy::T(3),\n;
var_dump(array_map('t',array(1,2)));
var_dump(array_map('Dummy::T',array(1,2)));
do it like this:
var_dump(array_map(array(Dummy,T), array(1,2)));
?
Marc
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[PHP] static functions w/ PHP 4?
Is there any way to have static functions and members of an Object w/ PHP 4.3?
Like:
class Auth {
static var error;
static function authenticate() {
...
}
}
Auth::authenticate();
?
The documentation suggests this is possible but I can't seem to make it work.
Is this behavior specific to PHP 5?
Thanks,
Mike
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Re: [PHP] static functions w/ PHP 4?
On Fri, 2005-12-09 at 14:48, Michael B Allen wrote:
Is there any way to have static functions and members of an Object w/ PHP
4.3? Like:
class Auth {
static var error;
static function authenticate() {
...
}
}
Auth::authenticate();
?
The documentation suggests this is possible but I can't seem to make it work.
Is this behavior specific to PHP 5?
In PHP4 if you don't make use of $this in a class method then it can be
used as a static function.
PHP4 does not support static class vars, instead you need to use a
static function with a static variable.
?php
class Auth
{
function authenticate()
{
...
}
function staticVar( $setValue=null )
{
static $myStaticVar = null;
if( $setValue !== null )
{
$myStaticVar = $setValue;
}
return $myStaticVar;
}
}
?
Cheers,
Rob.
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[PHP] Static functions
Hi, I'm a bit of a newbie to PHP, I've done some stuff in Java/VB/C++
but I'm having a few problems finding info on this issue.
Does PHP support something like static functions in Java?
for example in Java I can write:
public class someClass {
public static void someMethod() {}
}
and then in another file:
import someClass;
public class anotherClass {
someClass.someMethod()
}
Is there some way to access methods of a class without creating an
object in PHP?
Right now I just include the file (not using a class) and then call
the function but I would like to have it more seperate.
Thanks,
Leo
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Re: [PHP] Static functions
At 22:18 9-2-2003, you wrote:
Hi, I'm a bit of a newbie to PHP, I've done some stuff in Java/VB/C++
but I'm having a few problems finding info on this issue.
Does PHP support something like static functions in Java?
afaik the answer is no, but please do not rely on my pitiful opinion. I
only use my classes with one single object, just to keep the code cleaner.
See one of the articles on objects, in no particular order:
PHP makers on OOP http://www.php.net/oop
Lotsotalk http://www.liquidpulse.net/articles/125
knowledgebase http://www.faqts.com/knowledge_base/view.phtml/aid/7569
ZEND Using objects to create an application 1
http://www.zend.com/zend/tut/tutorial-johnson.php
ZEND An Introduction to Classes http://www.zend.com/zend/tut/class-intro.php
ZEND Overusing
OO http://www.zend.com/zend/art/mistake1.php#Heading13
Devarticles http://www.devarticles.com/art/1/241
http://www.devarticles.com/art/1/245
http://www.devarticles.com/art/1/262
http://www.devarticles.com/art/1/285
Devshed Accessing Databases with Class
http://www.devshed.com/Server_Side/PHP/Class/
Back to Class
http://www.devshed.com/Server_Side/PHP/BackToClass
PHPBuilder Classes and PHP
http://www.phpbuilder.com/columns/rod19990601.php3
Vamsi: Object Oriented Programming in PHP http://php.vamsi.net/article/3/1
OOP Talk : A slide presentation http://www.sdphp.net/talks/talks/sdphp_class
for example in Java I can write:
public class someClass {
public static void someMethod() {}
PHP has no public or private methods
import someClass;
public class anotherClass {
someClass.someMethod()
}
Is there some way to access methods of a class without creating an
object in PHP?
afaik you do need to create an object.
You can override a function with class y extends (class) x, see the
articles for examples
Right now I just include the file (not using a class) and then call
the function but I would like to have it more seperate.
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