PHP - New Instance Of Class Rewriting Other Instance?

Hello,

I'm attempting to build a Model View Controller and I've run into some issues with inheriting objects / extending classes. The application is focused around a "SuperObject", which contain instantiated libraries, helpers, controllers, models and views.

I current have a Base class, which is effectively the "SuperObject". Previously I called the function GetInstance() within my model to get an instance of the SuperObject and assign it to a variable. So, $this->Instance->(The Object)->(The Method)();

However, I want to remove the need for that variable $this->Instance and just have $this->(The Object)->(TheMethod)();

And so, If you see my Controller class, libraries are instantiated as $this->Object which works perfectly. If from, within my controller I was to load the Model class. For example, $this->Loader->Library('Model'); when that model becomes instantiated, even though an extension of the Base class, I cannot use the libraries I instantiated in my controller.

And of course there is a Fatal Error: Fatal error: Call to a member function UserAgent() on a non-object

Code: [Select]
<?php

class Base
{
private static $Instance;

public function Base()
{
self::$Instance =& $this;
}

public static function &GetInstance()
{
return self::$Instance;
}
}

function &GetInstance()
{
return Base::GetInstance();
}

Code: [Select]
<?php

class Controller extends Base
{
function Controller()
{
parent::Base();
$this->Initialize();
}

function Initialize()
{
$Array = array(
'Uri',
'Loader',
'Router',
'Database',
);

foreach($Array as $Object)
{
$this->$Object = loadClass($Object);
}

}
}
Code: [Select]
<?php

class Model extends Base
{
function Model()
{
parent::Base();
echo $this->Input->UserAgent();
}

    }

Code: [Select]
<?php

class Home extends Controller
{
function Home()
{
parent::Controller();
}

function index()
{
$this->Loader->Library('Session');
$this->Loader->Library('Model');

$Data = array(

'Controller' => $this->Router->FetchClass(),
'Title' => ucfirst($this->Router->FetchClass())

);

$this->Loader->View('meta',$Data);
$this->Loader->View('header',$Data);
$this->Loader->View('home');
$this->Loader->View('footer');
}
}

Any input would be appreciated!

So, I have what I think is an odd question.  I have a function that contains a for loop.  Within that for loop, it checks for a new condition and if it is true, it calls the very function it's already in.  So, within the for loop inside of function "a", it can call function "a" with new arguments which will then start a new for loop to be "nested" to the previous for loop, in a way.  My problem is trying to keep the values of the variables so that once the new for loop (or loops) finish, the previous for loop won't be stopped up by the new variable values that have since changed.  Make sense?  So, two questions:

1. How do I lock in values that make them unique to that very call of that function and keep them unique through further iterated versions?

2. I imagine, in theory, that for loops stay in memory in state as a new "instance" of that same for loop runs through, right?  Basically, is what I'm doing possible in that a for loop calls itself, in essence, to create a new "instance" of that for loop, then when it finishes, have the previous loop continue iterating?

For question #1, I've already thought about using variable variables, but that doesn't work because every time the function is called, the variable variable will change to new values based on the new arguments and instantiating the function again.  I'm kind of looking for a way to make unique "instances" of a method that don't mess with future calls to that method and where future calls don't mess with currently iterating loops in that method.

Phew, I think I confused myself.  Thanks for any help.

Hello,

I need to find the target html address within some raw html. I know it lies between Needle 1 and Needle 2 below.

Needle 1:
</span></a>&nbsp;&nbsp; <a href="

Needle 2:
" rel="nofollow"><span class=pn><span class=np>Next&nbsp;&raquo;</span></span></a></div>

Nornally I would just use the explode() function but my headache is that there are many instances of Needle 1 in the raw html code and I want my output array always have the same number of elements. However I do know that my target html address is directly after the last instance of Needle 1.

How should I go about splitting the html code into an array that always has 3 elements? I'd like the first element to include code up to and including the last instance of Needle 2, the 2nd element to have the target html address, and the 3rd element to have Needle 2 and any following code.

Thanks for any pointers (my main struggle is identifying the last instance of needle 1),

Thanks,

Stu

Hope someone can help, I am trying to add up all the values of a variable in a PHP while loop and have tried several approaches but none seem to work. Hopefully someone can point out what the correct method is.

I've set up some code to pull the pay rate from a MySQL table, and then calculate that person's earnings based on the amount of time they spend on a particular job. That works fine:

           while ($row = $getrate->fetch_assoc()) {

              $staffrate = $row["Rate"];

              $earnings = ($staffrate/3600) * $jobeventtimeseconds;

              $earningsformatted = number_format($earnings, 2);

           }

However there may be a number of jobs for different people with different rates, so I want to add all of these up and output the total. So for example if I had values of 125.00, 35.50 and 22.75 I want to show 183.25 as the total.

So I tried a few things I found on forums on the subject:

$totalearnings = 0;

foreach($earningsformatted as $key => $value) {

   $totalearnings += $value;

}

echo $totalearnings;

That didn't work so I tried another method that someone suggested:

$total=array($earningsformatted);

echo array_sum($total);

The 2nd method outputted just the last individual value, the 1st method didn't work at all. Does anyone have a working method that can be used to do this?

Thanks

Hey,

I'm trying to save a MySQL-Link source as an instance variable in my query class.
The problem is that MySQL sees it as an invalid MySQL-Link (supplied argument is not a valid MySQL-Link resource).
What I'm I doing wrong?

//Walle

Code: [Select]
private $connection;
//Construct
public function __construct(&$connection)
{
  $this->connection = $connection;
}

//Where the error occurs
public function exe_query($sql)
 {
  $result = mysql_query($sql, $this->connection);
  if(!$result) {
  throw new Exception(mysql_error());
 }
 return $result;
}

Hi, I have an output of print_r he

Google_Service_Calendar_Acl_Resource Object
(
    [stackParameters:Google_Service_Resource:private] => Array
        (
            [alt] => Array
                (
                    [type] => string
                    [location] => query
                )

            [fields] => Array
                (
                    [type] => string
                    [location] => query
                )

            [trace] => Array

I am wondering what is the right syntax to create the instance and set the variables? Thanks, Ted

I know you can use str_replace to replace a value with another value, or an array of values with an array of other values. What I'd like to do is replace each instance of a single value with an array of values which get iterated through for each instance found. Think prepared statements that you don't have to call setString or setInt on. Here's a made up example.
Code: [Select]
$db->query = 'SELECT * FROM users WHERE user_name = ? AND user_role = ?;
$db->params = array('hopelessX','admin');
$db->executeQuery(); //this contains a call to a private function that does the replace

I have everything else working except this. It works if I specify an array of values to replace and do something like below, but I was hoping to not have to support that method of replace if I didn't need to.
Code: [Select]
$db->query = 'SELECT * FROM users WHERE user_name = :name AND user_role = :role;
$db->replace = array(':name',':role');
$db->params = array('hopelessX','admin');
$db->executeQuery(); //this contains a call to a private function that does the replace

I can do it that way if I need to or I could make some overly complicated thing that finds each instance of the question mark, replaces it with a unique value and then adds that unique value to a replace array similarly to the method in code block two but that defeats to the purpose of making this simple database adapter in the first place (although it was mostly just for fun anyway).

Anyway, if anyone has any advice and knows of a simple means to achieve this goal that would be much appreciated.
Thanks in advance

Hi, I'm just wondering if there's any way to use the Limit to limit a search to the first instance of multiple items in one column?

Eg, in a table called news I might have:

subject          content
general          general news1
general          generalnews2
faq                 faq1
faq                 faq2
general          generalnew3


When I do

Code: [Select]
SELECT * FROM news ORDER BY content DESC LIMIT 0,1(same if I substitute the word subject for content in the line above)

...I get just the first item.
Ie:
subject       content
general       generalnews1

How would I go about getting the first instance of each subject and its contents to appear?

Ie:
subject    content     
general   generalnews1
faq           faq1



Thanks,

Dave

I have a table that contains the schools in my system:

schools
id
name
location
...

Then, I have three tables that use the id of this table:

schoolAdmins
schoolID

schoolContests
schoolID

students
schoolID

When I go to delete a school from my system, I want to check to see if that school is connected to any of these three other tables first.  This is what I tried (but obviously failed because I'm here) where I'm passing the query the $studentID in question:

SELECT * FROM schoolAdmins, schoolContests, students WHERE (schoolAdmins.schoolID = $schoolID) OR (schoolContests.schoolID = $schoolID) OR (students.schoolID = $schoolID)

I'm really new to the concept of querying multiple tables in a single statement, so I'm just kind of guessing at this point.  Thanks in advance.

I have a scenario in PHP, i need a smart way:
1. I run one process on background forever, scheduler.php - done
2. User on the web submit their task in DB to be processed by the above process(scheduler.php) - done
3. scheduler.php read the db after every 1 sec, looking for user's task.

Problem:
Ideally, if it founds like 10 or more tasks it should process them concurently(in parallel)..i.e it should not wait one task to be fully executed so as to run the next one as one task might take a very long time to be fullu executed.
I would do like exec("nohup php <path>/file_name.php >> /dev/null 2>&1 &"), but if i have alot of tasks this will create zombie processes.

Any smart way to do this will be highly appreciated!

Hi all,

I have a security problem with my website who is a social network (like facebook).
Let's me Explain :

You can execute this page on my website.
www.SocialNetWork.com/ChangeStatus.php?param=Hello
So your status become "Hello".

On your profile, you can create a link to a picture on the web, for example : <img src='http://www.hacking.com/pic.jpg'>

The problem is that a "hacker" create several russian girl profile and made links to pic.jpg on his server, and this .jpg file rewrite URL to : www.SocialNetWork.com/ChangeStatus.php?param=Suck.
So when you visite his profil, the php code is launched, and the status OF THE VISITOR is changed !

I have no idea of how to stop this ?
If i check the variable : $_SERVER['HTTP_REFERER']
The value is empty or www.SocialNetWork.com, but never www.hacking.com ...

How can i stop the fact that a foreign picture could launch a php page on my website ?

thanks for help !
ps: sorry for my english

I would like to better understand relative and absolute paths when rewriting URLs.  My virtual host configuration is shown below.

I wish the server to see something like:

https://example.com?page=page1&controller=controller1&data1=123&data2=321

Given the rewrites as shown in my virtual host, what would be the proper URL in the browser?  One of these (note the ? and &), or something different?

https://example.com/page1/controller1?data1=123&data2=321
https://example.com/page1/controller1&data1=123&data2=321

Next, if I enter one of the URLs, how do relative paths to images, etc work?  Would the browser think it is in the root directory, or in /page1/controller1?  I had problems with relative paths, and changed to absolute paths, and it fixed the problem, but I wish to better understand what is happening.   On a side note, I would appreciate any critique of my virtual host configuration.  My goal is for all requests to example.com to redirect to https://example.com, for only https://example.com (no subdomain) to redirect to https://www.example.com, and do the rewriting of page and controller.   Thank you

# Note that if a virtual ServerName is not found (i.e. IP 192.168.1.200), Apache defaults to first virtual host.
# Note that if ServerName is set to one of the virtual host ServerName's in the Second Section, it doesn't work (why?)

# Handle just example.com to http
<VirtualHost *:80>
    ServerName example.com
    ServerAlias *.example.com
    Redirect / https://www.example.com/
</VirtualHost>

# Handle just example.com without subdomains
<VirtualHost *:443>
    ServerName example.com
    # ServerAlias example.com
    SSLEngine on
    SSLCipherSuite SSLv3:TLSv1:+HIGH:!SSLv2:!MD5:!MEDIUM:!LOW:!EXP:!ADH:!eNULL:!aNULL
    SSLCertificateKeyFile /etc/pki/tls/private/example_key.pem
    SSLCertificateFile /etc/pki/tls/certs/example_startssl.crt
    SSLCertificateChainFile /etc/pki/tls/certs/sub.class1.server.ca.pem
    Redirect / https://www.example.com/
</VirtualHost>

<VirtualHost *:443>
    ServerName example.com
    ServerAlias *.example.com
    DocumentRoot /var/www/example/html

    SSLEngine on
    SSLCipherSuite SSLv3:TLSv1:+HIGH:!SSLv2:!MD5:!MEDIUM:!LOW:!EXP:!ADH:!eNULL:!aNULL
    SSLCertificateKeyFile /etc/pki/tls/private/example_key.pem
    SSLCertificateFile /etc/pki/tls/certs/example_startssl.crt
    SSLCertificateChainFile /etc/pki/tls/certs/sub.class1.server.ca.pem

    <Directory "/var/www/example/html">

        allow from all
        Options +Indexes

        <IfModule mod_rewrite.c>

            RewriteEngine On

            RewriteBase /

            # Are these lines necessary, or should I create a virtual host for http on port 80 instead?
            RewriteCond %{HTTPS} !=on
            RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [NE,R,L]

            ## If the request is for a valid directory, file, or link, don't do anything
            RewriteCond %{REQUEST_FILENAME} -d [OR]
            RewriteCond %{REQUEST_FILENAME} -f [OR]
            RewriteCond %{REQUEST_FILENAME} -l
            RewriteRule ^ - [L]

            #remove the trailing slash
            RewriteRule (.+)/$ $1

            # If you add this first rule to support views, be sure to remove the QSA flag from the second rule (maybe not required since the first rule has the L flag)
            #replace mypage/mycontroller with index.php?page=mypage&controller=mycontroller
            RewriteRule ^([^/]+)/([^/]+)/?$ index.php?page=$1&controller=$2 [L,QSA]
            #replace mypage with index.php?page=mypage
            RewriteRule ^([^/]+)/?$ index.php?page=$1 [L,QSA]

        </IfModule>
    </Directory>
</VirtualHost>

It has been brought to my attention that $_SERVER['PHP_SELF']; can be easily hacked.

In this code...
Code: [Select]
<form id="login" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">


Do I even need anything in the Action attribute if I am redirecting the form to itself?!

Please advise...



Debbie

This topic has been moved to mod_rewrite.

http://www.phpfreaks.com/forums/index.php?topic=359560.0

I have mysqli object in Database class base:

[color=]database class:[/color]

class Database {
  private $dbLink = null;
  
  public function __construct() {
    if (is_null($this->dbLink)) {
      // load db information  to connect
      $init_array = parse_ini_file("../init.ini.inc", true);
      $this->dbLink = new mysqli($init_array['database']['host'],
                           $init_array['database']['usr'],
                           $init_array['database']['pwd'],
                           $init_array['database']['db']);
  
      if (mysqli_connect_errno()) {
        $this->dbLink = null;
      }
    }
  }

  public function __destruct() {
    $this->dbLink->close();
  }
}


Class derived is Articles where I use object dBLink in base (or parent) class and I can't access to mysqli methods (dbLink member of base class):

Articles class:

require_once ('./includes/db.inc');

class Articles extends Database{
  private $id,
              ....
              ....
             $visible = null;
  
  public function __construct() {
    // Set date as 2009-07-08 07:35:00
    $this->lastUpdDate = date('Y-m-d H:i:s');
    $this->creationDate = date('Y-m-d H:i:s');
  }
  
  // Setter
  ....
  ....

  // Getter
  ....
  ....

  public function getArticlesByPosition($numArticles) {
    if ($result = $this->dbLink->query('SELECT * FROM articles ORDER BY position LIMIT '.$numArticles)) {
      $i = 0;
      while ($ret = $result->fetch_array(MYSQLI_ASSOC)) {
        $arts[$i] = $ret;
      }
      $result->close();
      return $arts;
    }
  }
}


In my front page php I use article class:


include_once('./includes/articles.inc');
$articlesObj = new articles();
$articles = $articlesObj->getArticlesByPosition(1);
var_dump($articles);


[color=]Error that go out is follow[/color]

Notice: Undefined property: Articles::$dbLink in articles.inc  on line 89

Fatal error: Call to a member function query() on a non-object in articles.inc on line 89

If I remove constructor on derived class Articles result don't change 
Please help me