PHP - Question About 'proper Way' To Use Objects, Methods, Classes

Hello,

Can anyone help me with this.
To put it simply.

Class foo {
protected $bar = new Moo();





How can i use this object (And it's methods) inside the methods of that class. So

function whatNot (){
$this->bar->Doesn't work.
}
}


I hope you can get my general meaning.

Hello, i been making a site to learn some PHP. I been always searching about what's the best way of using the PHP functions, classes and objects but i have a small question that i couldnt found the awnser by my self. so far i m inicializing an PHP class like this:

1st case
Code: [Select]
$themeobj = new theme();
Today i found an tuturial that used an other way of calling an function inside the class:

2nd case
Code: [Select]
theme::loadTheme;
I understand that the way i m doing, your iniciating the variable $themeobj as an object of the class theme and that the theme:loadTheme just calls the function loadTheme inside the theme class (please correct me if i m wrong), but here's where is where i need abit of enlightment. Using the 2nd case will "skip" the loading of the __construct function? when should you use the 1st case or the 2nd case? Every time i needed an function from theme i would use $themeobj->loadTheme($param) its safe to use theme::loadTheme($param)?

Thanks in advance

I am working on my Pool class (base) and my FootballPool class (derived). I have this as my constructor

Pool.php

protected $pid, $uid, $pkid, $name;
function __construct($pid, $uid){
$this->pid = $pid;
$this->uid = $uid;
$this->pkid = $this->pkid();
if(isset($_SESSION['picksInfo']['name']))
$this->name = $_SESSION['picksInfo']['name'];
else
$this->name = NULL;
}


Now a function in my FootballPool class needs to call $pid, $uid, and $pkid. How can I do that?
I have tried this: Pool::$pid, but then I get this error

Quote

Fatal error: Access to undeclared static property: Pool::$pid in /var/www/core/includes/FootballPool.php on line 31


I am confused, because in the parents constructor, it is set.

So basically, how can I call a variable set in the base class from a child or derived class?

Hi everyone,


Until now i didnt use classes and functions for sql related actions and now i would like to start.

I started out with this :

class.php
--------------------------------------------------- class db { 
    
    public function connect($database,$user,$password) { 
        $db = mysql_connect("localhost",$user,$password) or die (mysql_error());
        mysql_select_db($database);
    }
    
    
    static function fetch() {
    
         function getresults($query) { 

        $resultArray = array();
        $fetch = mysql_query($query) or die (mysql_error());
        
        while ($row = mysql_fetch_assoc($fetch)){
            $resultArray[] = $row;
          
            }
        
            return $resultArray;
    
        mysql_free_result($fetch);
                
        }
        

    }

        
}         and index.php
----------------------------

  <?php
require('class.php');

$connection = new db();
$connection->connect("testdb","root","root");

$connection->fetch()->getresults("SELECT * FROM users");

foreach (getresults() as $user) { 
    echo "<div>{$user['user_first_name']}</div>";
}

This may sound like a very stupid question, but I can't find a clear answer anywhere.

I'm making my first dive in OOP and all the tutorials only really show basic usage. They define a class, and show how to use it in a file.

My question is how does it work to use an object throughout a program? Is it available everywhere or do I store things in sessions and start a new object on each page?

For example: logging in a user. If I created an instance after confirming the credentials, would that same instance be available for use in say index.php, or would I just pass a session over and create a new instance on each page?

Again, sorry if this seems dumb to some people.

Hello, I'm new to the forum and I'm looking for advice.

I use a bunch of classes in namespaces that are I'm attempting to organize for autoloading. In other words, a class called \Foo\Package\Class is loaded from the file at Foo\Package\Class.php. I'm using spl_autoload for this. (If I were on 5.2 I could be using underscore-delimited pseudo-namespaces just as well; the implementation detail isn't important)

Now, I want to have multiple separate apps that use a single common library. Each app also has some classes that are local to it. How should I solve the autoloading problem?

I thought of the following approach. Is it any good?
Try autoloading from the common class library If it fails, try autoloading from the app's own local library
Part 2 of the question:

Within my apps, though, there are two types of classes: library ("vendor") classes that are only being used in that particular app so they don't need to be in the shared library, and app-specific classes that are the core of the app (so they, by definition, don't need to be in any shared library). I'd probably like to keep these two separate, so I'd need to add point #3 to the list above: search in the "core" class hierarchy of the local app. This gives 3 separate locations, and the problem is that they negate the advantages namespaces since there can be overlap. In which case one class will override the other during autoloading. So order of the above list would matter. And time would be wasted looking for a class in the first two places if it's more often in the third.

A solution I was considering is sticking to just one central library of classes (and dumping all app-local libraries there). Then, the core classes that belong to one app would be under an \AppName namespace.

I'm looking forward to some insights from the experts. How do you guys organize your class libraries?

I've been spending long hours learning about classes and their magic methods. I just came across a tutorial which showed a constructor like this:

class Device {
    //...
    public function  __construct(Battery $battery, $name) {
        // $battery can only be a valid Battery object
        $this->battery = $battery;
        $this->name = $name;
        // connect to the network
        $this->connect();
    }
    //...
}

the Battery part instantly caught my attention. Here had previously made a Battery class (and a more complete Device class) but the next thing he did really caught my interest:

$device = new Device(new Battery(), 'iMagic');
// iMagic connected
echo $device->name;
// iMagic

what the hell is going on here? Is this another way to include the methods and properties of one class into another class, in order words is this the same thing as:

class Device extends Battery

I don't think so because this new Battery() thing looks more like its creating an object inside the Device object. Previously the only way I could to that was to type $battery = new Battery() inside one of my methods. But this looks like hes doing something different. Can anyone explain whats going on here?   The whole tutorial is he http://code.tutsplus...-php--net-13085 in the main Device method he has a premade $battery variable to hold the Battery object. Sometimes I have multiple classes containing functions which I'd like to include in my main class. I can only extend one class, so I usually extent a class containing only properties, no methods. I still don't know what difference making that info class abstract is, I'd appreciate if anyone could tell me.   Also I'd love to know what the point in static methods is. I've never used them because I've never seen the point. Is it just to make it easier to call the methods because you don't need to create an object instance to call them? Sorry for the extra questions, the first one is what I'm really wondering about.    

Hello all!   I have this array of objects:

Array
(
    [0] => stdClass Object
        (
            [first_name] => test
            [last_name] => test
            [title] => test
            [id] => 34
            [type] => 4
            [manager] => 4
            [email] => p@yahoo.com
            [date] => 2014-09-21 07:23:12
            [status] => 2
            [approval_date] => 2014-09-21 07:31:10
            [assessment_id] => 1
            [supervisor_approval] => 1
            [manager_approval_date] => 2014-09-21 07:31:27
            [mainmanger] => 3
        )

    [1] => stdClass Object
        (
            [first_name] => test
            [last_name] => test
            [title] => test
            [id] => 34
            [type] => 4
            [manager] => 4
            [email] => p@yahoo.com
            [date] => 2014-09-20 07:39:55
            [status] => 2
            [approval_date] => 2014-09-20 07:40:41
            [assessment_id] => 3
            [supervisor_approval] => 1
            [manager_approval_date] => 2014-09-20 07:41:07
            [mainmanger] => 3
        )

    [2] => stdClass Object
        (
            [first_name] => jimmy john john
            [last_name] => john
            [title] => Lorad and Master
            [id] => 32
            [type] => 4
            [manager] => 3
            [email] => j@j.com
            [date] => 2014-09-21 07:38:50
            [status] => 2
            [approval_date] => 2014-09-19 07:39:25
            [assessment_id] => 2
            [supervisor_approval] => 1
            [manager_approval_date] => 2014-09-19 07:39:25
            [mainmanger] => 0
        )

)

Where "id" = the user ID.    If there are two or more entries for a user, I want to remove all but the most recent by the "approval_date",... So for the above example it would return:

Array
(
    [0] => stdClass Object
        (
            [first_name] => test
            [last_name] => test
            [title] => test
            [id] => 34
            [type] => 4
            [manager] => 4
            [email] => piznac@yahoo.com
            [date] => 2014-09-21 07:23:12
            [status] => 2
            [approval_date] => 2014-09-21 07:31:10
            [assessment_id] => 1
            [supervisor_approval] => 1
            [manager_approval_date] => 2014-09-21 07:31:27
            [mainmanger] => 3
        )

    [1] => stdClass Object
        (
            [first_name] => jimmy john john
            [last_name] => john
            [title] => Lorad and Master
            [id] => 32
            [type] => 4
            [manager] => 3
            [email] => j@j.com
            [date] => 2014-09-21 07:38:50
            [status] => 2
            [approval_date] => 2014-09-19 07:39:25
            [assessment_id] => 2
            [supervisor_approval] => 1
            [manager_approval_date] => 2014-09-19 07:39:25
            [mainmanger] => 0
        )

)

I'm having a hard time wrapping my head around this concept, so I don't have any example code. And I don't really need or expect someone to code this for me,. just a push in the right direction would be awesome.

Well the title may seem a bit confusing, but heres an example:

Code: [Select]
<?php
class User{
   public $uid;
   public $username;
   protected $password;
   protected $email;
   public $usergroup;
   public $profile;
   

  public function __construct($id){
      // constructor code inside
  }

  public function getemail(){
      return $this->email;
  } 
   
  public function getusergroup(){
      return $this->usergroup;
  }

  public function getprofile(){
      $this->profile = new UserProfile($this->uid);
  }
}

class UserProfile(){
   protected $avatar;
   protected $bio;
   protected $gender;
   protected $favcolor;
   

  public function __construct($id){
      // constructor code inside
  }

  public function formatavatar(){
      // avatar formatting code inside
  }

  public function formatusername(){
      // format username?
  } 
}
?>

As you can see, the User class(an outer class) has a property called Profile, which can be instantiated as a UserProfile object(an inner class). The two objects have distinct functionalities, but there are times when the UserProfile object needs to access property and methods from the user object. I know its easy for outer class to access methods from inner class by using the single arrow access operator twice, but how about the other way around?

Lets say from the above example the userprofile can format the username displayed to the screen by adding a sun to the left of the username if the usergroup is admin, a moon if the usergroup is mod, and nothing if its just a member. The usergroup property is stored in the outer class, and can be accessed with this $user->getusergroup() method only. I know I can always do the hard way by passing a user object to the method's argument, but is there an easier way for the inner class UserProfile to access properties/methods for outerclass User? If so, how can I achieve that?

I have the following three tables (and also delta_point and hist_point which are purposely left out and just mentioned for context).  Before going down the Doctrine ORM long curvy road, aggrType was just used to restrict possible values so that I didn't need to use MySQL's ENUM, but now I am thinking there may be value to making it an entity and include some methods (and a second reason because I still can't figure out how to make Doctrine create a FK constraint yet not populate the parent entity with a AggrType object).

point
-id (int PK)
-data
-dType /* descriminator.  Options are AggregatePoint, DeltaPoint, and HistoricPoint */

aggr_point
-id (int PK, FK to point)
-aggrType (char FK to aggrType)
-data

aggrType
-type (char PK) /* there are about five types */

I have a service to create a new point based on the provided desired type and user data.  I don't like the switch statement to determine which type of point to create, but don't know a better way.  Also my entity is responsible to provide the appropriate validation rules for the given point type which might not be considered proper but it seems to work for me.  Any constructive criticism is welcomed.

<?php
namespace NotionCommotion\PointMapper\Api\Point;
use NotionCommotion\PointMapper\Domain\Entity\Point;
class PointService
{
    public function create(string $type, array $params):integer {
        $class=[
            'aggr'=>'AggregatePoint',
            'delta'=>'DeltaPoint',
            'hist'=>'HistoricPoint',
        ][$type];
        //$class='Point\\'.$class;  //This doesn't seem to be possible and I needed to use the fully qualifed name without the short cut used namespace.
        $class='\\Greenbean\Datalogger\Domain\Entity\Point\\'.$class;
        $point=new $class();
        $validator=$this->getValidator($point);
        $params=$validator->sanitize($params);
        $validator->validate($params);
        $point->setAccount($this->account);
        $point->populate($params, $this->em); //Will be addressed later
        $this->em->persist($point);
        $this->em->flush();
        $point->setIdPublic($this->em->getRepository(Point\Point::class)->getPublicId($point->getId()));
        return $point->getIdPublic();
    }
}

Now, this is the part I am struggling with the most.  I only have one service to create any type of point, so I do wish to put a bunch of if/thens in it and instead move logic to the individual point type being created.  The AggrPoint in question requires a sub-point and I don't think it is appropriate to inject the entity manager into a point entity and as an alternative solution find an existing point which is associated with the account which resides in the new AggrPoint.  Maybe not appropriate, but it works.  This type of point also has a sub-object AggrType as discussed at the very beginning of this post, so I first attempt to create a new one from scratch, but that doesn't work and I need to set $aggrType with an existing one.  As an alternative, I passed the entity the entity manager, but as stated I think this is a bad idea.

Any recommendations where to go from here?  Thank you

namespace NotionCommotion\PointMapper\Domain\Entity\Point;
class AggregatePoint extends Point
{
    public function populate(array $params, \Doctrine\ORM\EntityManager $em):\NotionCommotion\PointMapper\Domain\Entity\Entity{
        $criteria = \Doctrine\Common\Collections\Criteria::create()
        ->where(\Doctrine\Common\Collections\Criteria::expr()->eq("id_public", $params['pointId']));
        if(!$subpoint = $this->getAccount()->getPoints()->matching($criteria)->current()){
            throw new \Exception("Invalid subpoint ID $params[pointId]");
        }
        $this->setSubpoint($subpoint);

        //This won't work since I must use an existing AggregateType and not create a new one
        $aggrType=new AggregateType();
        $aggrType->setType($params['aggrType']);

        //This just seems wrong and I shouldn't be passing the entity manager to an entity
        $aggrType=$em->getRepository(AggregateType::class)->findOneBy(['type'=>$params['aggrType']]);

        $this->setAggregateType($aggrType);

        unset($params['pointId'], $params['aggrType']);
        // parent::populate($params) not shown, but it basically calles appropriate setters based on the property name
        return parent::populate($params);
    }

    public function getValidatorRules():array
    {
        return $this->filesToArr(['/point/base.json', '/point/aggr.json']);
    }

}

 

Not sure how to describe what I'm trying to do here in the title, but here goes with what I am trying to accomplish.

I've got a few hundred lines of code in total so far, so I'll try to keep it as short as I can. I've got an application that I am programming using classes for each module and right now I am coding the base classes that I need in order for it to run (database, errors, logging, etc). What I'm doing for my database class is I have a query factory and it extends the MySQLi class so I can process, clean and code the rest of my app faster. I also have another, unrelated class "Error", which will be used for processing errors I might come across.

I'd rather do it this way instead of having to call trigger_error and error_log every time there is an error. I'd also not like to have to call a new instance of an object every time I need to use something from that class. Is there any way I can call a class within a class and return it as an object for all the methods within the class?

I've tried the methods below, but no luck I've tried others, but I'm trying to keep it brief and get what I'm trying to do across.

<?php

class QueryFactory extends MySQLi {

public  $err = new error(); //Doesn't work.
public  $err = error(); //Nope.

#This is the function that I need the $err object for.
function set($fields, $newvals) {

if ( is_array($fields) && is_array($newvals) ) {

if ( count($fields) != count($newvals) ) {
//Instead of below, I want to do something like $err->('Array lengths must match for method', 256, $islogged = 1);
                              trigger_error('Array lengths must match for method', 256);
}

}
}

}


The thing is, I have a "run.inc.php" which does include and create new objects for running just the basic app and if I try to redeclare the error class in query.class.php, it gives me an error saying I can't do that, but if i try to call $err from the page that has all the classes defined it throws an error saying that my method is undeclared. I'd like my error class be available to every other class I create so I can display and log errors as needed. Any suggestions or links to point me where I'd like to go?

what are magic methods? when do we need to use magic methods? what are the advantages of using magic methods? thanks in advanced.

I don't know if this belongs here; sorry if it doesn't.

I'm using a method=get on a form as I need to pass information through a URL once the form has been submitted.
But I also need to INSERT some data from that form to multiple tables.

- How can I stop the GET from passing my other variables into the URL?
- How do I make the form submit to itself? I need to use the 'index.php?p=checkout' as this matches with a switch statement, which matches to the checkout page. The function PHP_SELF will just refresh to the index.php page, which will not have any of this checkout's page validation.

Here's my code:
Code: [Select]
<h2>Please enter your details</h2>
<h3>All fields required</h3>
<div id="checkout">

<?php

if (isset($_GET['checkout'])){
require_once ('./includes/connectvars.php');

$title = $_GET['title'];
$fname = $_GET['fname'];
$sname = $_GET['sname'];
$ctype = $_GET['ctype'];
$cnumber = md5($_GET['cnumber']);
$syear = $_GET['smonth'] . $_GET['syear'];
$fyear = $_GET['fmonth'] . $_GET['fyear'];
$service = $_GET['cardAuth'];
$amount = $_REQUEST[$total];
$msg = rand(1000,9999);
$api = 'd41d8cd98f00b204e9800998ecf8427e';
$b_house = $_GET['b_house'];
$b_postcode = $_GET['b_postcode'];
$b_city = $_GET['b_city'];
$b_country = $_GET['b_country'];
$d_house = $_GET['d_house'];
$d_postcode = $_GET['d_postcode'];
$d_city = $_GET['d_city'];
$d_country = $_GET['d_country'];

$dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);

$query = "INSERT INTO customer
 (cust_id, first_name, last_name) VALUES ('', '$fname', '$sname')
  ";
$query = "INSERT INTO bill 
  (cust_id) VALUES ('')
  ";
$query = "INSERT INTO deliver
  (cust_id) VALUES ('')
  ";
  
 mysqli_query($dbc, $query);
}

//.'service='.$service.'msg_id='.$msg.'num_md5='.$cnumber.'amount='.$amount.'currency=GBP'.'api_key='.$api.

?>

<form method="get" action="index.php?p=checkout">

<table>
<tr>
<td><input type="hidden" name="cardAuth" /></td>
</tr>
<tr>
<td>
Title:
</td>
<td>
<select name="title" value="<?php if (!empty($title)) echo $title; ?>" >
<option></option>
<option>Mr</option>
<option>Sir</option>
<option>Ms</option>
<option>Miss</option>
<option>Mrs</option>
</select>
</td>
</tr>
<tr>
<td>
First Name:
</td>
<td>
<input type="text" name="fname" value="<?php if (!empty($fname)) echo $fname; ?>"/>
</td>
</tr>
<tr>
<td>
Surname:
</td>
<td>
<input type="text" name="sname" value="<?php if (!empty($sname)) echo $sname; ?>"/>
</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>
<tr>
<td>
Card Type:
</td>
<td>
<select name="ctype" value="<?php if (!empty($ctype)) echo $ctype; ?>">
<option>mastercard</option>
<option>visa</option>
<option>amex</option>
<option>solo</option>
<option>maestro</option>
<option>jcb</option>
<option>diners</option>
</select>
</td>
</tr>
<tr>
<td>
Card Number:
</td>
<td>
<input type="text" name="cnumber" value="<?php if (!empty($cnumber)) echo $cnumber; ?>"/>
</td>
</tr>
<tr>
<td>
Valid From:
</td>
<td>
<select name="smonth" value="<?php if (!empty($smonth)) echo $smonth; ?>">
<option>01</option>
<option>02</option>
<option>03</option>
<option>04</option>
<option>05</option>
<option>06</option>
<option>07</option>
<option>08</option>
<option>09</option>
<option>10</option>
<option>11</option>
<option>12</option>
</select>
<select name="syear" value="<?php if (!empty($syear)) echo $syear; ?>">
<option>07</option>
<option>08</option>
<option>09</option>
<option>10</option>
<option>11</option>
</select>
</td>
</tr>
<tr>
<td>
Expires End:
</td>
<td>
<select name="fmonth" value="<?php if (!empty($fmonth)) echo $fmonth; ?>">
<option>01</option>
<option>02</option>
<option>03</option>
<option>04</option>
<option>05</option>
<option>06</option>
<option>07</option>
<option>08</option>
<option>09</option>
<option>10</option>
<option>11</option>
<option>12</option>
</select>
<select name="fyear" value="<?php if (!empty($fyear)) echo $fyear; ?>">
<option>10</option>
<option>11</option>
<option>12</option>
<option>13</option>
<option>14</option>
</select>
</td>
</tr>
<tr>
<td><h4>Billing Address</h4></td>
</tr>
<tr>
<td>
House Name/ Number:
</td>
<td>
<input type="text" name="b_house" />
</td>
</tr>
<tr>
<td>
Postcode
</td>
<td>
<input type="text" name="b_postcode" />
</td>
</tr>
<tr>
<td>
City:
</td>
<td>
<input type="text" name="b_city" />
</td>
</tr>
<tr>
<td>
Country:
</td>
<td>
<input type="text" name="b_country" />
</td>
</tr>
<tr>
<td><h4>Delivery Address</h4></td>
</tr>
<tr>
<td>
House Name/ Number:
</td>
<td>
<input type="text" name="d_house" />
</td>
</tr>
<tr>
<td>
Postcode
</td>
<td>
<input type="text" name="d_postcode" />
</td>
</tr>
<tr>
<td>
City:
</td>
<td>
<input type="text" name="d_city" />
</td>
</tr>
<tr>
<td>
Country:
</td>
<td>
<input type="text" name="d_country" />
</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>
<tr>
<td>&nbsp;</td>
<td>
<input type="submit" name="checkout" value="Checkout"/>
</td>
</tr>
</table>

</form>
</div>

hey guys im wdondering if there's a magic method which works like  

__GET()

    but allows you to put a parameter in...thank you

<?php

class test
{
      public function run()
      {
              $this->object->('string');
              // __get with parameter?
       }

       public function __get($value)
       {
              return $this->{$value}
       }
}

?>

Should this be the proper way of adding the getUsername() text in the query below:

Code: [Select]
mysql_query("UPDATE posts SET content = '$content', lastedit = ". getUsername() .":NOW() WHERE id = '$pid'") or die(mysql_error());