PHP - Setting A Global Help

I use $db object to handle database function like $db->get_row for example. Is there any way that I don't need to put into every function global $db or do I actually need to repeat in every function global $db?

Code: [Select]
function example(){
   global $db //Do I need to repeat this in each function?
}

Just wanted to know if $_Session was a global thing or does php require cookies setup?   I assumed that I could do something like this:

PAGE: A.php
session_start();
$_Session['Cat'] = 'Meow';

// -----------------------

PAGE: B.php
if (isset($_Session['Cat']) && !empty($_Session['Cat'])){
echo $_Session['Cat'];
}
OUTPUT: Meow

// -----------------------
PAGE: C.php
if (isset($_Session['Cat']) && !empty($_Session['Cat'])){
echo $_Session['Cat'];
}

OUTPUT: Meow

I can't seem to get this to work.   Page: Handler.inc

	// ========================================================= Session Log in / out
	public function logon($username, $password){
		if ($username == "admin" && $password == "coffee"){
			
				session_start();
				$_SESSION['USER_STATUS'] = '1';
				
				echo 'IN SESSION LOGIN HANDLER';
				echo $_SESSION['UserLogged'];
			}
		}
		
	public function logout(){
				$_SESSION['USER_STATUS'] = '0';
				
				echo 'IN SESSION LOGOUT HANDLER';
				
				session_destroy();
				//session_unset();
		}

Page: index.php

if (!isset($_SESSION['USER_STATUS']) && empty($_SESSION['USER_STATUS']) || $_SESSION['USER_STATUS'] == 0){
		if (isset($_POST['username']) && !empty($_POST['username']) && isset($_POST['password']) && !empty($_POST['password'])){
			
			$username = $_POST['username'];
			$password = $_POST['password'];
			
			echo $handler->logon($username, $password); 
		
			}

<LOGIN FORM CODE>

}else{

		if (isset($_SESSION['USER_STATUS']) && !empty($_SESSION['USER_STATUS']) || $_SESSION['USER_STATUS'] == 1){
			echo 'Session name: '. $_SESSION['USER_STATUS'];
		}

	if (isset($_POST['btn_logout']) && !empty($_POST['btn_logout'])){

		$handler->logout();
		echo '<br />Logged out<br />';
		
		}

<LOGOUT FORM BUTTON CODE>

}

Could someone point me in the right direction please. It does not seem to hold its session.        

Hi there,

I am a highly concerned about ever using global variables (as many guides I have seen on security issues with PHP say you should avoid them, kind of understand why though to be fair), but I was wanting to really understand custom based session handlers in PHP and this first one he http://uk.php.net/manual/en/function.session-set-save-handler.php on the example: 'Example #1 session_set_save_handler() example' uses them.

Now would it be better to take the global variable in function: ''open()' and then return the variable $sess_save_path then pass it up to the next function that may need it perhaps?

I just don't want to use globals if I can avoid it, been working out a system that work use for some old solution we use and it uses globals and it really bugs the living life out of me, why people are so lazy they can't avoid them at all costs grrr.

Any advice generally speaking is of great appreciation,
Jeremy.

Hiya!

I was wondering if this is possible. Here is my example.

This is a example class;

<?php
class a {

public function __construct() {

}

public function returnValue() {
include 'files/lang.php';
$this->lang = new lang();
return $this->lang->displayLang('10');
}
}
?>


This is the second class file;

<?php
class b {

public function __construct() {

}

public function returnValue() {
include 'files/lang.php';
$this->lang = new lang();
return $this->lang->displayLang('10');
}
}
?>


This is the main file;

<?php
include 'test/a.php';
$test = new a();
$test->returnValue();

include 'test/a.php';
$test2 = new b();
$test2->returnValue();
?>


With this I'm getting an error stating I cannot redeclare the function lang. I have found a way around this by using require_once but I was wondering if remove the include and $this->lang var from class 2 and I put this as the $this->lang var declaration in class 1;


global $this->lang = new lang();


will class 1 and class 2 be able to use it from only the one declaration made in class 1. If so, would this be the way to do it or is there a better/working way to do it?

Many many thanks,

James.

I know there is a function for this, but for some reason my google-fu is off and I cannot remember it for the life of me.

What is the function to export an array into the global namespace? Such that:
$var=array('key'=>'val');
somefunc($var); 
echo $key;

Would work?

        $errors=0;

         //NEW USER NAME HAS BEEN SUBMITTED, CHECK IT OUT AND THEN ADD IF OKAY
$newuser=$_REQUEST['newuser'];

function TryAgain(){
global $errors;
$errors++;
echo '<br/><br/>Please try again <a href="index.php?locate=admin&sub=add_admin">here</a>';
echo "<br/>errors=[$errors]";
}



echo "<br/>Trying to add user: $newuser<br/><br/>";
if ($newuser){
}else{
// field was left blank, report this to user and give them option to try again
echo '<br/>Field was left empty, you must pick a username.';TryAgain();
}

if (strlen($newuser)<5){echo 'Username should be at least 5 characters.';TryAgain();}

if (!$errors){echo "continue to SQL [errors=$errors]";}



what is wrong with this code?
For some reason if I increment $errors with $errors++   within the function it doesn't increment outside the function's scope. even though I declare it as a global at the start of the function. I know I'm doing something stupid here but can somebody please tell me what it is?

Thanks

I need the following three variables to be available globally, that is to every page.
(An common header.html uses them at every page).
Please teach me how to initialize them.
(inside the header.html maybe?)

          
'U_M_CODE'   => append_sid("{$phpbb_root_path}faq.$phpEx", 'mode=bbcode'),
'U_M_TERMS'  => append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=terms'),
'U_M_PRV'    => append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=privacy'),        


Thank you.
   

If I want to load some user information from the database into an object/array and share it throughout my application, what's the best approach for this? Here is what I thought of doing:

- I can call a function (e.g user_info() ) that will return the user information whenever I need it , but It'll have to run a DB query each time I call it.

- Load user information once from the DB, assign it into a global array/object, then call that object whenever I need it.

A lot of people recommended against using global variables, but I think performance wise it's better than running a query each time.

Are there any better alternatives than the above approaches?

<?php


function getglobal() {

global $my_global;

echo "The value of \$foobar is '$foobar' <br />";


}

$my_global = 20;

getglobal();

?>

It's supposed to give the result,

Quote

'The value of $my_global is '20';



But instead when I try it, its giving me

Quote

Notice: Undefined variable: foobar in C:\wamper\www\php\index.php on line 17
The value of $foobar is ''



So I don't really understand what's happening and why it's not working.

Can someone tell me what some of the purposes of this would be?
global $PHP_SELF;

its defined right after a function like this

function myFunction(module =' '){
global $PHP_SELF;

....

}
Thanks

ok iv set up a simple demo

this is the code im running

include('simple_html_dom.php');
include('config.php');
include('connect.php');
include('functions.php');
include($_SERVER['DOCUMENT_ROOT'] . DIRECTORY_SEPARATOR . 'globalFunctions.php');

test();

echo "test variable = ".$test;

exit;

this is the function which is in globalFunctions.php which is two directories back ../../

function test() {
$test = 10;

global $test;
}

how come when i run script i am not getting variable echoed

Through out my program I have used
global $mysqli;
as a connection to my database - this has worked fine so far.

Now I have called
$sql_statement = "SELECT * FROM items WHERE name='$itemName'";
$itemStats = mysqli_fetch_array(mysqli_query($mysqli, $sql_statement), MYSQLI_ASSOC);
via a function and I get the following warnings -
Quote

Warning: mysqli_query() expects parameter 1 to be mysqli, null given in /functions/getdata.php on line 27
Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, null given in /functions/getdata.php on line 27

it still works though and returns the correct information.

If I take the code out of the function and use it normally then I get no Warnings - but this defeats the whole purpose of having functions!

How do I get rid of the warnings? (and no, I don't mean turn the warnings off  )

Hey,

I've been developing a browsergame. In this you are able to produce something ("weed"). Now I've got some kind of trouble with the function that is responsible for updating the "weed" on the user accounts.

Im going to explain, how my script is working

First step:

Loading the datas from "worlds". In this case id, weed_factor, weed_basis. What this is required for you will see in the next steps 


<?php

include 'includes/settings/mysql.php';
mysql_connect($dbhost, $dbuser, $dbpass);
mysql_select_db($dbbase);

$time = time();

$update_weed_world_data_sql = "SELECT id, weed_factor, weed_basis FROM worlds";
$update_weed_world_data_res = mysql_query($update_weed_world_data_sql) OR DIE (mysql_error());
while($update_weed_world_data_while = mysql_fetch_assoc($update_weed_world_data_res)){
$update_weed_world_id = $update_weed_world_data_while['id'];
$update_weed_world_basis[$update_weed_world_id] = $update_weed_world_data_while['weed_basis'];
$update_weed_world_factor[$update_weed_world_id] = $update_weed_world_data_while['weed_factor'];
global $update_weed_world_basis;
}


Second step:

This is the function which is editing each account by the data given as parameters.


function do_update_weed($profile_id,$world,$update,$level,$time){
$update_weed_period = $time - $update;
$update_weed_add = ($update_weed_period / 3600 * $update_weed_world_basis[$world] * pow($update_weed_world_factor[$world],$level)) +1;
echo $update_weed_world_basis[$world];
echo "<br>";
mysql_query("UPDATE profiles SET weed = weed +$update_weed_add, weed_update = $time WHERE id = $profile_id LIMIT 1");
}


Note:


echo $update_weed_world_basis[$world];


doesnt result an output.

In step three, the accounts are loaded:


function todo_update_weed($time){
$todo_update_weed_sql = "SELECT * FROM profiles WHERE weed_update < $time";
$todo_update_weed_res = mysql_query($todo_update_weed_sql) or die (mysql_error());
while($todo_update_weed_while = mysql_fetch_assoc($todo_update_weed_res)){
do_update_weed( $todo_update_weed_while['id'],
$todo_update_weed_while['world_id'],
$todo_update_weed_while['weed_update'],
$todo_update_weed_while['level_farm'],
$time
);
}
}


And the last step is calling function "todo_update_weed" with the time.


todo_update_weed($time);


I script calculate the time between the last update and the current time. This make a difference in time. With this value I calculate something else. And then the update time has to be saved.

The script has just working fine, when I set the variable "$update_weed_add" with a fix value. But by now the script doesn't work, because I don't know how to make the array available inside functions.

I considered whether I put the database-function for the world_data inside the function that updates the profiles. But if I do this, the database will be called thousands of times...

Hope anybody has a nice idea to fix the problem 

hello.

I have some oop code that pulls information about a page out of a mysql db but i dont want to put the code on every page. Instead in want to put it in the a function and pass it back to each page.

do i put it in a function in my functions.php file or can i put it into my includes/pages.php includes file ??

the code looks for the page name on the page and then pulls that pages info from the db.
this code works on the page - home.php

Code: [Select]
<?PHP
require_once("../includes/initialize.php");

$currentPages = Pages::find_all();

$pName = "adminHome";

$page_id = "";
$visible = "";
$pageZones = "";
$pageCRUD = "";
$pageTypes = "";
$module = "";
$title = "";
$sub_title = "";
$description = "";
$image = "";
$about = "";


foreach($currentPages as $currentPage){

$page_id = $currentPage->id;
$pageName = $currentPage->pageName;
$visible = $currentPage->visible;
$pageZone = $currentPage->pageZones_id;
$pageCRUD = $currentPage->pageCRUD_id;
$pageType = $currentPage->pageTypes_id;
$module = $currentPage->module_id;
$title = $currentPage->title;
$sub_title = $currentPage->sub_title;
$description = $currentPage->description;
$image = $currentPage->image;
$about = $currentPage->about;



if($pageName == $pName){

echo $pageName.'<br/>';
echo $page_id.'<br/>';
echo $visible.'<br/>';
echo $pageZone.'<br/>';
echo $pageCRUD.'<br/>';
echo $pageType.'<br/>';
echo $module.'<br/>';
echo $title.'<br/>';
echo $sub_title.'<br/>';
echo $description.'<br/>';
echo $image.'<br/>';
echo $about.'<br/>';
}
}
?>

i would like to be able to just put global $page or something like that to get all the db info for each page.


i tried this in my  includes/pages.php includes file but it cant get the page name.

Code: [Select]
public static function find_by_pageName(){
global $database;
global $pName;

$sql = "SELECT * FROM ".self::$table_name." WHERE pageName=".$pName."";
$result_array = self::find_by_sql($sql);
return !empty($result_array) ? array_shift($result_array) : false;
}



any suggestions ???? whats the best way to do this ?

thanks
ricky