PHP - Php Class Variables

I'm confused as to why assigning these variables in the class causes the page not to load...


var $RootFolder = '/shyid/';
var $PagePath = str_replace($this->RootFolder, '', dirname($_SERVER['PHP_SELF']));
var $PageSections = explode('/', $this->PagePath);


but when i set them on the page, everything works correctly?


$head->RootFolder = '/shyid/';
$head->PagePath = str_replace($head->RootFolder, '', dirname($_SERVER['PHP_SELF']));
$head->PageSections = explode('/', $head->PagePath);


Insight? Thanks.

What would be the simplest way? Do you use a method in the child class?

Personally I use

Code: [Select]
parent::$this->whatever;

But I was wondering what you guys do.

All my code is returning is the username... Please help.   index.php

<?php

include('user.class');
$user = new user("Jbonnett", "0", "Admin", "Jamie", "Bonnett", "jbonnett@site.co.uk", "01/09/1992");

echo "username: " . $user->getUsername() . "<br/>";
echo "id: " . $user->getId() . "<br/>";
echo "level: " . $user->getLevel() . "<br/>";
echo "Forename: " . $user->getForename() . "<br/>";
echo "Surname: " . $user->getSurname() . "<br/>";
echo "Email: " . $user->getEmail() . "<br/>";
echo "Dob: " . $user->getDob() . "<br/>";


?> 

user.class 

<?php

class user {
	
	private $username;
	private $id;
	private $level;
	private $forename;
	private $surname;
	private $email;
	private $dob;
	
	public function user($username, $id, $level, $forname, $surname, $email, $dob) {
		$this->setUsername($username);
		$this->setId($id);
		$this->setLevel($level);
		$this->setForename($forename);
		$this->setSurname($surname);
		$this->setEmail($email);
		$this->setDob($dob);
	}
	
	public function destroy() {
		unset($this->username);
		unset($this->id);	
		unset($this->level);	
		unset($this->forename);	
		unset($this->surname);	
		unset($this->uemail);
		unset($this->dob);		
	}
	
	public function setUsername($username) {
		$this->username = $username;
	}
	
	public function getUsername() {
		return $this->username;
	}
	
	public function setId($id) {
		$this->id = $id;
	}
	
	public function getId() {
		return $this->$id;
	}
	
	public function setLevel($level) {
		$this->level = $level;
	}
	
	public function getLevel() {
		return $this->level;
	}
	
	public function setForename($forename) {
		$this->foreName = $forename;
	}
	
	public function getForename() {
		return $this->forename;
	}
	
	public function setSurname($surname) {
		$this->surName = $surname;
	}
	
	public function getSurname() {
		return $this->surname;
	}
	
	public function setEmail($email) {
		$this->email = $email;
	}
	
	public function getEmail() {
		return $this->email;
	}
	
	public function setDob($dob) {
		$this->dob = $dob;
	}
	
	public function getDob() {
		return $this->dob;
	}
	
};

?>

Hello there   After a few years of spending less and less time coding, I've got a lot of catching up to do. Back when I left I usually would run without classes. Now this is a big deal for me today.   I do understand the concept of classes and already did some working models, mostly from my learning process.   Now here is what is bothering me:

<?PHP

class database {
	// Variables
	public $test;
	
	// Constructor
	public function __construct()
	{
		$test = "4";
	}
	
	
	// Functions
	//
	public function test()
	{
		var_dump($this->test);
	}
	
}

$test = new database;

$test->test();

?>

Wether I run this script on itself, nor through another file, this does work. What i get is:   NULL   The constructor does run, I did an echo inside it. Also it does not matter if the variable is public, private or protected - it will be always NULL.   Error_reporting is on E_ALL, does not show any errors.   What have I overlooked?

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!

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

I have an existing instance of my class Database, now I want to call that instance in my Session class, how would I go about doing this?

Ok. I know you can pass the object of a class as an argument. Example:


class A {
    function test() {
        echo "This is TEST from class A";
    }
}


class B {
    function __construct( $obj ) {
        $this->a = $obj;
    }

    function test() {
       $this->a->test();
    }

}


Then you could do:

$a = new A();
$b = new B($a);


Ok so that's one way i know of.

I also thought that you could make a method static, and do this: (assuming class A's test is 'static')

class B {
    function test() {
       A::test(); 
   }
}


But that is not working.


I'd like to know all possible ways of accomplishing this. Any hints are appreciated. thanks

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

Can you call Class A's methods or properties from Class B's methods?

Thanks.

does anyone know how to decode this XML variable value into string values? I also need to know the oposite way: creating variable values into xml. I've tried several code examples but they did filter the requested data.

Code: [Select]
$xml='<?xml version="1.0" encoding="utf-8"?>
<elements>
<text identifier="ed9cdd4c-ae8b-4ecb-bca7-e12a5153bc02">
  <value/>
</text>
<textarea identifier="a77f06fc-1561-453c-a429-8dd05cdc29f5">
  <value><![CDATA[<p style="text-align: justify;">Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>]]></value>
</textarea>
<textarea identifier="1a85a7a6-2aba-4480-925b-6b97d311ee6c">
  <value><![CDATA[<p style="text-align: justify;">Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy  eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed  diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum.  Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor  sit amet.</p>]]></value>
</textarea>
<image identifier="ffcc1c50-8dbd-4115-b463-b43bdcd44a57">
  <file><![CDATA[images/stories/red/cars/autobedrijf.png]]></file>
  <title/>
  <link/>
  <target/>
  <rel/>
  <lightbox_image/>
  <width><![CDATA[250]]></width>
  <height><![CDATA[187]]></height>
</image>
<text identifier="4339a108-f907-4661-9aab-d6f3f00e736e">
  <value><![CDATA[Kramer 5]]></value>
</text>
<text identifier="ea0666d7-51e3-4e52-8617-25e3ad61f8b8">
  <value><![CDATA[6000 RS]]></value>
</text>
<text identifier="90a18889-884b-4d53-a302-4e6e4595efa0">
  <value><![CDATA[Eindhoven]]></value>
</text>
<text identifier="410d72e0-29b3-4a92-b7d7-f01e828b1586">
  <value><![CDATA[APK Pick up and return]]></value>
</text>
<text identifier="45b86f23-e656-4a81-bb8f-84e5ea76f71f">
  <value><![CDATA[15% korting op grote beurt]]></value>
</text>
<text identifier="3dbbe1c6-15d6-4375-9f2f-f0e7287e29f3">
  <value><![CDATA[Gratis opslag zomerbanden]]></value>
</text>
<text identifier="2e878db0-605d-4d58-9806-8e75bced67a4">
  <value><![CDATA[Gratis abonnement of grote beurt]]></value>
</text>
<text identifier="94e3e08f-e008-487b-9cbd-25d108a9705e">
  <value/>
</text>
<text identifier="73e74b73-f509-4de7-91cf-e919d14bdb0b">
  <value/>
</text>
<text identifier="b870164b-fe78-45b0-b840-8ebceb9b9cb6">
  <value><![CDATA[040 123 45 67]]></value>
</text>
<text identifier="8a91aab2-7862-4a04-bd28-07f1ff4acce5">
  <value/>
</text>
<email identifier="3f15b5e4-0dea-4114-a870-1106b85248de">
  <value/>
  <text/>
  <subject/>
  <body/>
</email>
<link identifier="0b3d983e-b2fa-4728-afa0-a0b640fa34dc">
  <value/>
  <text/>
  <target/>
  <custom_title/>
  <rel/>
</link>
<relateditems identifier="7056f1d2-5253-40b6-8efd-d289b10a8c69"/>
<rating identifier="cf6dd846-5774-47aa-8ca7-c1623c06e130">
  <votes><![CDATA[1]]></votes>
  <value><![CDATA[1.0000]]></value>
</rating>
<googlemaps identifier="160bd40a-3e0e-48de-b6cd-56cdcc9db892">
  <location><![CDATA[50.895711,5.955427]]></location>
</googlemaps>
</elements>';

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?

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 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 do know how to do this but I am curious about whether or not there is a "preferred" way to do this. I know there are a couple ways to use a class (I'll call Alpha_Class) within another class (I'll class Beta_Class)

Let's say we have this simple class (Beta_Class):

class beta {
    function foo(){
    
    }
}


If I wanted to use the Alpha Class within the Beta Class, I could any number of things. For example:

class beta {
    function foo(){
        $this->alpha = new alpha;
        //$this->alpha->bar();
    }
}


Or you could simply use the $GLOBALS array to store instantiated objects in:

$GLOBALS['alpha'] = new alpha;
class beta {
    function foo(){
        //GLOBALS['alpha']->bar();
    }
}


You could even declare Alpha_Class as a static class and thus would not need to be instantiated:

static class alpha {
    static function bar(){}
}

class beta {
    function foo(){
        //alpha::bar();
    }
}


Those are the only ways I can think of right now. Are there any other ways to accomplish this? I was wondering which way is the best in terms of readability and maintainability.