PHP - Class Member Static Variable Can't Append

I am having problem with calling class member from with the function in that class.
<?php
class board
{


function __construct () 
{
$num_sheep_init=20;
  $num_lion_init=2;
$board_value=array(0=>'',
  1=>'',
  2=>'',
  3=>'',
  4=>'',
  5=>'',
  6=>'',
  7=>'',
  8=>'',
  9=>'',
  10=>'',
  11=>'',
  12=>'',
  13=>'',
  14=>'',
  15=>'',
  16=>'',
  17=>'',
  18=>'',
  19=>'',
  20=>'',
  21=>'',
  22=>'',
  23=>'',
  24=>'');
$random_array_value=array (0,1,2,3,4,5,7,9,10,11,13,14,15,17,19,20,21,22,23,24);
$selected_index=array();
$randd=array();
$countt=0;
}
function init_board ()
{
$this->board_value['6']="S";

Above is part of the code where i am having problem. It says that it can not access empty property //$this->board_value['6']="S";

I have 2 php files. I am unable to get B's global variable from A's static method:

A.php
Code: [Select]
class c_A
  { public static function f_A()
      { include_once( "B.php" ) ;
        print f_B() ;
      }
  }
c_A::f_A( ); // only prints "B : "

B.php
Code: [Select]
$gvs = "global variable from B" ;

function f_B()
  { return "B : " . $GLOBALS[ "gvs" ] ;
  }


any thoughts?


thanks,
Shannon

Hello, my first post here.

I created a Validation class that depends entirely on static methods. It appears to be working well, but perhaps I misunderstood exactly the purpose and the consequences of using static methods.

My class essentially looks like this:


class Validate
{
static public $errors  = array();
static public $valid   = array();

static public function Name($name)
{
if ($name != '')
{
self::$valid['name'] = $name;
return true;
}
                                else
                                {
                self::$errors['name'] = 'Name is empty';
                return false;
                                 }
}
}


Does this create any chance whatsoever for a collision of data from multiple users? I am beginning to think it does, simply because from what I have recently learned about static methods, theyr'e essentially global variables because they are not instantiated. If that's the case, then it would seem possible that during times of heavy use, any application depending on this class would confuse submitted data.

Any thoughts?

Thanks in advance.

Was just wondering why some people choose NOT to make use of static functions when initializing objects via Factory Classes/Containers.

What are the benefits of initializing the Factory class when for all intensive purposes, it's only used to initialize new classes, etc? 
Does this have any impact on Dependency Injection?  I'm assuming that it doesn't since that would defeat the purpose.

---------

Also, I've noticed that there seems to be an intense stigma within the development community in regard to singletons. 
Are singletons necessarily a bad thing? 

What about database objects? 

One argument I've heard is that this can often impact the flexibility of your application in the event that a new instance of said class needs to be initialized(a second completely separate connection).

However, I was thinking that you could simply store these objects within a static member variable in the factory class; leaving the Database Class' __construct public in the event that you need to create that second/third/fourth connection.

Wouldn't this resolve the issue? 

Hi guys, I am trying something fairly simple but I'm not sure if this would be a good practice. Basically I am using a big class called CommonLibrary that holds common functions as methods and common variables as static variables. But I have some variables here and there like $allAlphabet = range ('a' , 'z'), that cannot be declared as a property because it gives me a parse error.

I don't want to call an object for this class because instancing it is of no use. Values will never change with regards to instances. So the next best thing that I tried was declaring all static variables first, and then changing thei property values inside the class __construct with self::$variable = 'somevalue', and then using this code below to assign values to the empty static variables.


$dummyObject = new CommonLibrary;
unset($dummyObject);
echo CommonLibrary::$staticVariable; // This property is NULL before the constructer is triggered.


Anyone recommend any better ways of doing this?

Thanks in advance!

Is it possible to have a static variable in php?  I want the value of a variable to remain unchanged the next time a function is called.

I have a class which pulls settings from the database. These settings are needed for the application to be run. Currently it queries the database on each page load and adds the information to a static variable.

What I'm after is a way to store this information in the variable so it can be accessed on each page without having to query the database. Memcache is an option but it can be disabled in my application so I am after another if possible.

Thanks

so my situation is something like this , i'm trying to fetch user details based on `id` that isset is getting, but some how the `variable that contains the $_GET value doesn't work` in query but when i put an static value to pdo query then it works and show the result. i have checked by doing `var_dump` of variable `$user` before query and it shows the correct value but not working in query. Below is the code i'm working with:

Hello,
   I have the situation shown below in the code:

if(//condition is met)
{ $val = new Val();
  $valon = $val->check($_POST, array(.........));
}
if($valon->passes())
{ $use = new Use();
  ........
}
//check() and passes() both belong to class Val
public function check($source, $items = array())
{ ......................
  return $this;
}

I get the following warning and error:

Notice: Undefined variable: valon
and
Fatal error: Call to a member function passes() on a non-object

I can't see anything wrong with the code. check() returns an object of class Val which is assigned to $valon, $valon then calls a member function of class Val. Could you please help. Please let me know whether to include further code.

I have a class that creates a grid from an xml feed. 

The class file is attached.

The grid displays on a page which is defined within the class as follows:

Code: [Select]
private $results_page = '/foobar.php';
I'm including the same class in multiple folders (the folders are addon domains) so I can have just one copy of the class so it is easy to modify.

The problem is that I need to add a variable containing the folder name to the $results_page path, so that when the class executes within each folder, the $results_page is 'FOLDER//foobar.php'

I have a file with defines in each folder, and I have tried including that file in the class and using the defined var in the construct, but I can't get it to work.

What am I missing?

I have a method that is returning a funny variable, it should be returning what is below and when I echo the return from inside the method it is right.
Code: [Select]
Software/Section

but when I goto echo the from outside the class I get the following. It adds a back slash
Code: [Select]
Software//Section


this is the method code and it works fine when I echo the returnValue the value is right
Code: [Select]
    // Creates a  dymamic case statement for making a the choice
    // inside and array
        foreach (scandir($dir) as $folderItem) {
            if ($folderItem != "." AND $folderItem != "..") {
                if (is_dir($dir.$folderItem.DIRECTORY_SEPARATOR)) {

                    $folderItem = $folderItem  ; // this allows the the dir to be placed if statements below
                    $folderContents = $this->showPage( $dir.$folderItem ,$getPageGlobal  , $subdir);
                    $subdir = ""; // this resets so that ithe value does not get added to main links;
                }
                else {
                // put into if into array
                    if($getPageGlobal== $folderItem) {
                        $pageReturn = $dir . $folderItem;
                       
                    }
                }
            }
        }
        echo $pageReturn.'<br>';
        return $pageReturn;

This is the way I am echoing the class. This is when it decides to add the back slash
Code: [Select]
echo $dynamicMenu->getShowPage();

I am working on a site that was made a while ago and on a custom page I am making I am needing to call up variables and my brain is too fried to think up the solution for this.  The standing code is this:

class site{
var $name = 'Site';
var $data = 'on';
{

What I need to do is callup the variables, such as $name, as simple as possible.  How would I do this?

If i declare protected variable in a class how can i access those variable in other class inheriting that class?

Can anyone post example code?

Using this locally works fine:


$html = $name::add_content($name, $html);


but i get the double colon error whe using it live.
$name is a name of a valid class.

What could throw this error when it works locally?