PHP - Calling Class Properties / Methods From A Different Class' Method?

If a class has a constructor but also has a static method, if I call the static method does the constructor run so that I can use an output from the constructor in my static method?

--Kenoli

Hi,

I need to be able to call a class based on variables.  E.G.

I would normally do:
Code: [Select]
$action = new pattern1()
but i would like to be able to do it dynamicaly:
Code: [Select]
$patNum = 1;
$action = new pattern.$patNum.()
Im wondering if that's possible?  If so what would the correct syntax be?

Many Thanks.

Hi people!

class FirstOne{

public function FunctionOne($FirstInput){
//do stuff and output value
return $value1;
}

}


Then:-


class SecondOne{

public function FunctionTwo($AnotherInput){
//do stuff and output value
return $value2;
}

}


What I want to know is this, if I want to use FunctionOne() in Class SecondOne do I do it like this:-

(Assume as I have instantiated the first class using $Test = new FirstOne(); )


class SecondOne{

function SecondedFunction(){
global $Test;
return $Test->FunctionOne();
}

public function FunctionTwo($AnotherInput){
//do stuff and output value
return $value2;
}

public function FunctionThree(){

//some code here
$this->Test->SecondedFunction();<--I think as I can omit the $this-> reference
}
}


My point is: Do I have to do it this way or is there way of having this done through __construct() that would negate the need for a third party function?

I have a version working, I just think that it is a little convoluted in the way as I have done it, so I thought I would ask you guys.

Any help/advice is appreciated.

Cheers
Rw

I have two classes:

## Admin.php

<?php
class Admin
{
public function __construct()
{
include("Config.php");
}

/**
* deletes a client
* @returns true or false
*/
function deleteClient($id)
{
return mysql_query("DELETE FROM usernames WHERE id = '$id'");
}
}
?>


## Projects.php

<?php
class Projects
{
public function __construct()
{
include("Config.php");
$this->admin = $admin;
$this->dataFolder = $dataFolder;
}

/**
* Deletes a project
* @returns true or false
*/
function deleteProject($id)
{
$root  = $_SERVER['DOCUMENT_ROOT'];
$theDir  = $root . $this->dataFolder;
$sql  = mysql_query("SELECT * FROM projectData WHERE proj_id = '$id'");
while ($row = mysql_fetch_array($sql))
{
$mainFile = $row['path'];
$thumb = $row['thumbnail'];
if ($thumb != 'null')
{
unlink($theDir . "/" . substr($thumb,13));
}
unlink($theDir . "/" . substr($mainFile,13));
}
$delete = mysql_query("DELETE FROM projectData WHERE proj_id = '$id'");
$getDir = mysql_query("SELECT proj_path FROM projects WHERE id = '$id'");
$res = mysql_fetch_array($getDir);
rmdir($theDir . "/" . $res['proj_path']);
return mysql_query("DELETE FROM projects WHERE id = '$id'");
}
}
?>


How can I call deleteProject() from within Admin.php?

I can't find an explicit answer on this anywhere, but when you create a child class from an abstract class must you use ALL of the methods that are inside the abstract class in the new child class? Or are these methods just available to the child class to pick and choose?

Hi all,

I have two classes. Registration and Connection.

Inside a registration.php I include my header.php, which then includes my connection.php...

So all the classes should be declared when the page is loaded.

This is my code:


registration.php:

<?php include ('assets/header.php'); ?> 
        
    <?php
        class registration{                    
            public $fields = array("username", "email", "password");
            public $data = array();
            public $table = "users";
            public $dateTime = "";
            public $datePos = 0;
            public $dateEntryName = "date";
            
            function timeStamp(){
                return($this->dateTime = date("Y-m-d H:i:s"));
            }
            
            function insertRow($data, $table){      
                    
                    foreach($this->fields as $key => $value){
                        mysql_query("INSERT INTO graphs ($this->fields)
                        VALUES ('$data[$key]')");
                    }
                    
                    mysql_close($connection->connect);
            }
            
            function validateFields(){
            
                $connection = new connection(); 
                $connection->connect();
                        
                foreach($this->fields as $key => $value){
                    array_push($this->data, $_POST[$this->fields[$key]]);
                }
                $this->dateTime = $this->timeStamp();
                array_unshift($this->data, $this->dateTime);                
                array_unshift($this->fields, $this->dateEntryName);   
                
                foreach($this->data as $value){
                    echo "$value";
                }
                
                $this->insertRow($this->data, $this->table);
            }
        }
        
        $registration = new registration();
        $registration->validateFields();
    ?>

<?php include ('assets/footer.php'); ?>



At this point I cannot find my connection class defined on another included/included page.



                $connection = new connection(); 
                $connection->connect;





config.php (included within header.php)

<?
    class connection{ 
        public $dbname = '**';   
        public $dbHost = '**';
        public $dbUser = '**';
        public $dbPass = '**';
        public $connect;
        
        function connect(){
            $this->connect = mysql_connect($this->dbHost, $this->dbUser, $this->dbPass) or die ('Error connecting to mysql');
            mysql_select_db($this->dbname, $this->connect);
        }
    }
?>



Any ideas how to call it properly?

I have a class in which I have a function called connection. I am now trying to call this function from another class, but it will not work. It works if I put the code in from the other function rather than calling it but that defeats the purpous.

class locationbox

{
   function location()
   {
   
   
   $databaseconnect = new databaseconnect();
         $databaseconnect -> connection();{

$result = mysql_query("SELECT * FROM locations");

while($row = mysql_fetch_array($result)) // line that now gets the error, mysql_fetch_array() expects parameter 1 to be resource, boolean given //in
  {
  echo "<option>" . $row['location'] . "</option>";
    }
   
}
}}

I'm doing some basic object coding to get my head around OOP PHP, but I've come across something I can't get to work.

I've got two identical peices of code, MyClass is defined, MyClass2 is then defined as an extension of MyClass.  MyClass has three properties Public, Private and Protected.

In my first example I can access Public and Protected via a method in MyClass2, this class does NOT have a constructor.  The second example has a constructor but I cannot access Public:

Code: [Select]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<body>
<?php
ECHO "MyClass2 does not have a constructor, Public & Protected both echo correctly from MyClass2->printHello!!!<BR>";
/**
 * Define MyClass
 */
class MyClass
{
    public $public;
    protected $protected;
    private $private;
protected $varXXX;

function __construct() {
$this->public = "Public";
        $this->protected = "Protected";
        $this->private = "Private";
//$this->printHello();
}


    function printHello()
    {
echo $this->public . "!!!<BR>";
        echo $this->protected . "!!!<BR>";
        echo $this->private . "!!!<BR>";
    }
}




/**
 * Define MyClass2
 */
class MyClass2 extends MyClass
{
    // We can redeclare the public and protected method, but not private
    protected $protected = 'Protected2';
/*
function __construct() {
        echo $this->public . "#<BR>";
        echo $this->protected . "#<BR><BR>";
        //echo $this->private . "???<BR>";
}
*/
    function printHello()
    {
        echo $this->public . "???<BR>";
        echo $this->protected . "???<BR><BR>";
        //echo $this->private . "???<BR>";
    }
}

$obj = new MyClass();
//echo $obj->public . "<BR>"; // Works
//echo $obj->protected; // Fatal Error
//echo $obj->private; // Fatal Error
//$obj->printHello(); // Shows Public, Protected and Private

$obj2 = new MyClass2();
//echo $obj2->public; // Works
//echo $obj2->private; // Undefined
//echo $obj2->protected; // Fatal Error
$obj2->printHello(); // Shows Public, Protected2, Undefined
?>
</body>
</html>
RESULTS IN:
Public???
Protected???

Code: [Select]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<body>
<?php
ECHO "MyClass2 DOES have a constructor, Public does not work from MyClass2->printHello!!!<BR>";
/**
 * Define MyClass
 */
class MyClass
{
    public $public;
    protected $protected;
    private $private;
protected $varXXX;

function __construct() {
$this->public = "Public";
        $this->protected = "Protected";
        $this->private = "Private";
//$this->printHello();
}


    function printHello()
    {
echo $this->public . "!!!<BR>";
        echo $this->protected . "!!!<BR>";
        echo $this->private . "!!!<BR>";
    }
}




/**
 * Define MyClass2
 */
class MyClass2 extends MyClass
{
    // We can redeclare the public and protected method, but not private
    protected $protected = 'Protected2';

function __construct() {
        echo $this->public . "#<BR>";
        echo $this->protected . "#<BR><BR>";
        //echo $this->private . "???<BR>";
}

    function printHello()
    {
        echo $this->public . "???<BR>";
        echo $this->protected . "???<BR><BR>";
        //echo $this->private . "???<BR>";
    }
}

$obj = new MyClass();
//echo $obj->public . "<BR>"; // Works
//echo $obj->protected; // Fatal Error
//echo $obj->private; // Fatal Error
//$obj->printHello(); // Shows Public, Protected and Private

$obj2 = new MyClass2();
//echo $obj2->public; // Works
//echo $obj2->private; // Undefined
//echo $obj2->protected; // Fatal Error
$obj2->printHello(); // Shows Public, Protected2, Undefined
?>
</body>
</html>
RESULTS IN:
#  << Missing the property's contents
Protected2#

??? << Missing the property's contents
Protected2???



Any ideas why I cannot access the property's contents in the second example when the only difference is that it has a constructor?

Hi there,
I am just wondering which way is the correct one if you want to create object properties/attribute dynamically at run time

using magic method __set(), __get(), for example:

class Foo{
    
        public $data = array();
      
        public function __set($name,$value){
              $this->data[$name] = $value;
        }

        public function __get($name){
              if ( isset($this->data[$name]) ){
                    return $this->data[$name];
              }
        }
}


Or using the below way


class Foo{

          public function assign(array $data){
                     foreach($data as $key => $value){
                                $this->$key = $value;
                     }
          }

}


I just encountered the second way in many places and I am totally confused  . Is the __set() method called implicitly by the PHP engine in the second way or what? how come this is considered as a valid code  ?

your usual help is appreciated

This is probably a quick one. I am pretty new to OOP, in fact somewhat a novice. I am working a lot more with objects lately as my previous "flat" php experience doesn't allow me to create clean and expandable applications. Of course though, questions will always pop up (that's what you guys are for?)

One concept I am having trouble understanding, is the method to call a class.

What is the difference between?:

Code: [Select]
<?php $cat = new class(); ?>
and just simply:

Code: [Select]
<?php  new class(); ?>
Both appear to have the same output from my small amount of practice, but the first way seems strange to me. Being that I am very new to OO PHP, the first way looks like it is just defining a var. But in reality it is calling the class and running it? This seems very backwards to me and I am having a hell of a time understanding it. I am aware that the first way seems to be the "proper" way, but just can't fathom it.

Could someone explain this to me a little further?
thanks much,

I have a PHP config file called config.php.

inside the file is simular to this:

Quote

<?php
class JConfig {
   var $offline = '0';
   var $editor = 'tinymce';
   var $list_limit = '20';
}
?>


From another file, i have included config.php, but how do I call $editor to get "tinymce"?

Thanks

I found class on the net, and i am having a bit of a problem to understand how does update method works. Here is the code:
Code: [Select]
public function update() {
  global $database;
// Don't forget your SQL syntax and good habits:
// - UPDATE table SET key='value', key='value' WHERE condition
// - single-quotes around all values
// - escape all values to prevent SQL injection
$attributes = $this->sanitized_attributes();
$attribute_pairs = array();
foreach($attributes as $key => $value) {
  $attribute_pairs[] = "{$key}='{$value}'";
}
$sql = "UPDATE ".self::$table_name." SET ";
$sql .= join(", ", $attribute_pairs);
$sql .= " WHERE id=". $database->escape_value($this->id);
  $database->query($sql);
  return ($database->affected_rows() == 1) ? true : false;
}

I have form like this to deal with update:
Code: [Select]
<form action="index.php?page=languages" enctype="multipart/form-data" method="POST">
    <?php foreach($language as $lang){ ?>
    <input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size; ?>" />
    <label>Jezik</label><input type="text" size="50" name="language" value="<?php  echo $lang->lang; ?>" /><br>
    <input type="hidden" name="id_lang" value="<?php echo $lang->id_lang; ?>"  />
<label>Slika</label><input type="file" name="image"><?php 
echo "<img src=\"../images/";
echo $lang->image;
echo "\">";
?> <br>
    <label>Pozicija</label><input type="text" name="pozicija" value="<?php echo $lang->pozicija; ?>" size="2" /></p> <br>
<input type="submit" name="submit_update" value="Unesi">
    <?php } ?> 
    </form>
and code to start the function:
Code: [Select]
if(isset($_POST['submit_update'])) {
$language = new Jezik();
$language->update();
}
What next???

can someone help me I am trying to call a class function using a varible.... example
say i go to index.php?page=contact i want to pull that class with out doing a switch statement can someone help me
Code: [Select]
<?php
$Site = page;
$Site->getPage($_GET['page']);
?>
Code: [Select]
<?php
class page extends site {

function getPage($page) {
return $this->$page;
}
function Contact() {
echo '<h2>Contact test</h2>';
echo '<form>

</form>';
}

}
?>

I am calling an object from another class in the constructor of first class but when I call it in another function it does not access it's object. Here is the code.
Code: [Select]
<?php
/* This is controller.php used to control the flow of data between view.php and 
model.php. This file cotains all the controlling mechanism of the data 
It was created on 11th Feb 2011 By Narjis Fatima for an Open Source Project and
contains all the includes to the database etc.
*/
include ("view.php");
include ("functions.php");


$name = stripslashes($_GET['username']);
$email = stripslashes($_GET['email']);
//echo "in controller.php";
check_validate_input($name, $email);
$newUser = new controller($name, $email);
$action=$_GET['t'];
$newUser->display_view($action);


class controller
{
public $my_model;    //is an object of model class
public $user_info;//=array('id' , 'username' ,'role','email','interests','location', 'homepage');
    function __construct($name,$email)
    {
  
    $my_model = new model();
    $user_info =  $my_model->check_members($name,$email); echo "<pre>";
    print_r  ($user_info);

    }
    function __destruct()
    {
    }
    function display_view($token)
    {
    echo "In display function";
    echo "<pre>";
    print_r  ($user_info);
    if ($this->user_info == NULL)
    {
        if (($token=="register"))
        {
          show_registration_form();
        } 
        else{   
          show_mailing_form();  
        }
    }
    if ($this->user_info['role'] == "admin")
    {
         $myView = new view();
         $myView->view_admin_menu();
    }
     if ($this->user_info['role'] == "user")
    {
         $myView = new view();
         $myView->view_user_menu() ;
    }
    }//close of function display_view()
} 



/* name and email cominfg from index.php would be checked by the controoler class 
to be checked if it a vaild name and email. The database would be connected n the 
model.php*/
  
?>

The code for model.php is as follows
Code: [Select]
<?php
//This is model.php created on 10th Feb 2011  .It deals with daytabase connection
//
//By NArjis Fatima
//For the project of EDUForge an Open Source Software 
//include ("register.php");
class model{
public $dbh;
public $user_arr=array('username','password','email','location','interest','homepage');
//cunstructor of model class

//function to connect to database
function __construct(){
          try{
    $this->dbh = new PDO("mysql:host=localhost;dbname=phpfaqproject",'root','');
//echo "connected";
      }
  catch(PDOException $e){
  echo $e-> getMessage();
} 
}
public function check_members($username,$email)
{
   //get_connected();
   
   
   $sql = "SELECT * FROM account WHERE (username='" .$username ."' AND email='"
      .$email."')";
       $sth = $this->dbh->prepare($sql);
      $sth->execute();
  
    
    $result = $sth->fetch();
   /* echo('<pre>');        
    print_r($result);*/
    return ($result);
      
}
 public function insert_data($user_info)
 {
 //$user_info = $user_in;
 //$dbh;
 try{
$dbh = new PDO("mysql:host=localhost;dbname=phpfaqproject",'root','');
//echo "connected";
}
catch(PDOException $e){
echo $e-> getMessage();
} 
         $dbh->exec("INSERT INTO account (username, userpassword, email, role, location, interest, homepage)
       VALUES ('" .$user_info['username']."','".$user_info['password'] 
      ."','".$user_info['email']."', 'user','".$user_info['location']."','".$user_info['interests']
      ."','".$user_info['homepage']."')");
}
 
}
?>


Please somebody help me. I am really stuck.
I am also sending my attachment.

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?