PHP - Declare Variables In Php Class

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.

I'm looking for a more efficient way of declaring variables within a class. What I normally use is a class which is actually a database object. Every time I make a new table in my database I make a new class and new attributes to match the fields in the db table. Looks something like this:

    Code: [Select]
protected static $table_name="myTable";
protected static $db_fields=array('id', 'name', 'address', 'tel_number', 'fax_number');

public $name;
public $address;
public $tel_number;
public $fax_number;

//etc. etc.
At the moment I am manually adding the attribute, everytime I add a field to the db table. I'm guessing there should be a way to loop through the $db_fields array and add an attribute in the loop? Can anyone help me with the syntax for this. Is there also a way that I don't have to list the fields everytime in $db_fields....can $db_fields not just look at the relevant db table and pull out the field names in some kind of clever method?

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.

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!

Howdy colleagues,   I have noticed some programmers re-declare their variables before using them. Like so:

$name = '';
$name = 'Elizabeth';

First of all, why do they do that? Variables are being re-written with each "=" anyways. Secondly, do you believe this is better than just doing:

$name = 'Elizabeth';

Thank you

hi, cane somebody please explain how to use the declare contruct of PHP 
some code snippets may help..thanks in advance

Can you set a variable like so:

Function something(bob = true) {

}

hi good day, im a little bit confuse. what i want to do is instead of $username = $_POST['username']; is to transform it into OOP?

please help me. thanks.

I'm started learn PHP about 7 days.I want to know>>is this possible to declare a Variable like $password="Phpfreaks"??? 

Hi, I have these variables for pages I navigate to because I pass them in the query string. However, I need a variable for the homepage (index.php), before any query string is created. I cant declare a vari

$_GET['intro'] ;
$_GET['about'] ;
$_GET['contact'] ;



However, I need a variable for the homepage (index.php), before any query string is created. I cant declare a variable in index.php because it will be used throughout the entire website. I also cant declare the variable in home.php (the bulk content of the homepage) because I need to use the variable before home.php is included. Is their a trick for this?

Thanks!

According to woorank.com my page shows the following.


Language
    Declared: Missing
    Detected: en

I have used Code: [Select]
header('content-type: text/html; charset=utf-8');
but do not know how I declare the language.

also how do i specify Language/character encoding

how is this done ?

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 am running through a tutorial and I am getting an error based on a the concatication operator on my output. Below is my code.

As you can see I am echoing $display_block .= "<p>$title<br>$rec_label<br>....

If I send this as-is I get this error: Notice: Undefined variable: display_block in C:\wamp\www\php\php_mysql\sel_byid.php on line 36

I can resolve the error by placing this before the while loop: $display_block = "";

Is there a better way to output the concatenation.= so I don't need to do this weird fix?



while ($row = mysql_fetch_array($result))
{
$id = $row['id'];
$format = $row['format'];
$title = stripslashes($row['title']);
$artist_fn = stripslashes($row['artist_fn']);
$artist_ln = stripslashes($row['artist_ln']);
$rec_label = stripslashes($row['rec_label']);
$my_notes = stripslashes($row['my_notes']);
$date_acq = $row['date_acq'];

if ($artist_fn != "")
{
$artist_fullname = trim("$artist_fn $artist_ln");
}
else
{
$artist_fullname = trim("$artist_ln");
}

if ($date_acq == "0000-00-00")
{
$date_acq = "[unknown]";
}

$display_block .= "<p>$title<br>$rec_label<br>$artist_fullname<br>$my_notes<br>$date_acq<br>$format</p>";