PHP - Converting Collection Of Objects To Json

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']);
    }

}

 

Hi I am new to PHP and I need to create an array and add both books to the array and than loop through the array this is where I am having trouble if the price of a book is less than $20.00 output the book’s name and price if the book’s title comes after the letter R in the alphabet output the book’s title.

I am getting these error:

Notice: Trying to get property 'price' of non-object in C:\xampp\htdocs\PHP objects\books.php on line 45

Notice: Trying to get property 'title' of non-object in C:\xampp\htdocs\PHP objects\books.php on line 49

Notice: Trying to get property 'price' of non-object in C:\xampp\htdocs\PHP objects\books.php on line 50

Fatal error: Uncaught Error: Call to a member function get_first_char() on string in C:\xampp\htdocs\PHP objects\books.php:52 Stack trace: #0 {main} thrown in C:\xampp\htdocs\PHP objects\books.php on line 52

My code is:

<?php
class Book {
  // Properties
  public $price;
  public $title;
  public function get_first_char() {
    $titleArray = str_split($this->title);
    return reset($titleArray);
}

  // Methods
  function set_price($price) {
    $this->price = $price;
  }
  function get_price() {
    return $this->price;
  }
  function set_title($title) {
    $this->title = $title;
  }
  function get_title() {
    return $this->title;
  }
  
}

$first_book = new Book();
$first_book->set_price('$13.95');
$first_book->set_title('Moby Dick');
echo "Price: " . $first_book->get_price();
echo "<br>";
echo "Title: " .  $first_book->get_title();
echo "<br>";
$second_book = new Book();
$second_book->set_price('$23.99');
$second_book->set_title('Wuthering Heights');
echo "Price: " . $second_book->get_price();
echo "<br>";
echo "Title: " .  $second_book->get_title();
echo "<br>";
$book = array("Moby Dick", "Wuthering Heights");
echo "Book Titles: " . $book[0] . ", "  . " and " . $book[1] . ".";

foreach ($book as $bookItem) {
    $price = $bookItem->price;
    // Right now $price is a string ('$xx.xx'), we need it to be numeric
    $price = (float) substr($price, 1);
    if ($price < 20) {
        echo $bookItem->title;
        echo $bookItem->price;
    }
    if (ord(strtoupper($bookItem->get_first_char())) > ord('R')) {
        echo $bookItem->title;
    }
}
 ?>

Any help will be very much appreciated

Thank you

In a relational database, you "link" tables together.  For example, Customer (parent) ---> Product (child)

How do you do that with Objects?

I have a "User" class and an "AddressBook" class.  A User can have zero or more Addresses (in their AddressBook).

If I create a User object and an AddressBook object, I need a way to link them up similar to how they are linked up in the database.

Make sense?!


TomTees

I took an object, and saved it into a database serialized.

Code: [Select]
$object_here = serialize($theobject);
Then later on, I go and I get that data from a database, and try to unserialize it..

Code: [Select]
$objecthere = unserialize($row->theobject)

And it throws the following error...any advice?
Quote

Warning: unserialize() [function.unserialize]: Node no longer exists in /path/to/file on line 20

I found it helpful to configure all my objects in one or several bootstrap scripts.  Before doing so, I would often find myself forgetting that I already had written some class which is located deep in some script and recreating it for some other need (granted, composer definitely helped in this regard, but using it wasn't always applicable).

<?php

$c=new Pimple\Container(getMySettings());

$c['pdo'] = function ($c) {
    $db = $c['settings']['mysql'];
    return new \PDO(bla);
};

$c['foo'] = function ($c) {
    return new Foo(
        $c->get('pdo')
    );
};

$c['bar'] = function ($c) {
    return new Bar(
        $c->get('foo')
    );
};

It is all good until I find myself needing to create some new instance of some class instead of just passing some common instance to whoever needs it.

class Foo
{
    private $pdo;

    public function __construct(\PDO $pdo)
    {
        $this->pdo=$pdo;
    }

    public function getSomething():SomeClass
    {
        return new SomeClass($this->getAllDataFromDB($GET['id']));
    }
}

class SomeClass
{
    private $arr;

    public function __construct(array $records)
    {
        foreach($records as $record) {
            $arr[]=new SomeOtherClass($record);
        }
    }
}

I've read that one shouldn't create new objects in a given class's constructor, and while I could instead do so in some class's method and pass the object to the given class's constructor, to me it seems to really be the same thing.  The three issues I have with this scenario a

Needing to remember that these classes exist as they are hidden deep in some classes. Makes it more difficult to replace one of the classes with some other class in the future. Some duplication of code.

Are there other compelling reasons not to do so?  Is it worth the effort to do differently?

If so, how would you recommend doing so?  My thoughts would either to use Pimple's factory() method are create my only factory which also relies on anonymous functions.  Maybe something else?

$c['someClass'] = $c->factory(function (array $record, Container $c) {
    return new SomeClass($record);
});

Thanks

I know it is often frivolous, but sometimes I can't help trying to optimize things, and use the following two methods to create either an object injected with a string or one of a set of objects.  For both cases, the class has no setters so there is no chance that the object will later be changed.  I first stated doing this in continuously running server applications which I believe makes sense, however, it has leaked over to standard HTTP requests.

Please commit good or bad on this approach. Thanks

 

    public static function create(string $unit):self
    {
        static $stack=[];
        if(!isset($stack[$unit])) {
            $stack[$unit] = new self($unit);
        }
        return $stack[$unit];
    }

    public static function create(string $class):FunctionInterface
    {
        static $stack=[];
        if(!isset($stack[$class])) {
            $stack[$class] = new $class;
        }
        return $stack[$class];
    }

 

Hi all,   I am working with the following 2 page script: https://github.com/k...hi/php-riot-api. All works well and the data is pulled via the API as intended. However, depending on the data I'm trying to display on screen, the object contains multiple values.   For example:

$r = $test->getSummoner($summoner_id,'name');
print_r($r);

outputs their ID and name: {"585897":"TheirName"}   Just as the following:

$r = $test->getSummonerByName($summoner_name);
print_r($r);

outputs username, ID, Name, profile icon ID, level, and timestamp: {"theirname":{"id":585897,"name":"TheirName","profileIconId":642,"summonerLevel":30,"revisionDate":1405652924000}}   Depending on which function I am calling (on example.php), I would like to be able to split the values so I can echo them throughout a page:   Name: <value> ID: <value> Level: <value> etc...   Any guidance would be appreciated.

Ever since I started using OOP this past week, I have not been able to go back to the old "procedural" methods. HOwever, I seem to be stuck on creating a mysql connection that I can reuse in all of my classes.

After I set up a connection to mysql using the mysqli object, I am unable to use the mysqli in other objects.

Code: [Select]
$mysqli = new mysqli(.....);

class new_class {

        function quickQuery () {
        $mysqli->query('some query')
    }
}
Obviously, this doesn't work, because $mysqli is not defined within that functions scope. One way, is to use global keyword.

Code: [Select]
global $mysqli
However, globals "are the root of all evil" and simply go against the idea of encapsulation in OOP.

What's a way around this? HOWEVER:

1) I still want to use the mysqli object
2) I don't want to reference the $link of the db each time I instantiate a new class

....
Maybe I'm asking too much? And I've google for the past hour or so. Singleton seems interesting but it requires the creation of a new db connection class. I want to use the mysqli object.

Hi all, I was just wondering is this possible what I'm trying to do? Models can only store one object at a time... I'm trying to access multiple objects via one model...

<?php

	class users extends Model {
		
		protected $username;
		protected $firstname;
		protected $secondname;
		protected $age;
		// There will be more here...
		
		public function __construct($id = NULL) {
			
			if($id != NULL) {
				
				$this->username = $sql->getUsername($id);
				$this->firstname = $sql->getFirstname($id);
				$this->secondname = $sql->getSecondname($id);
				$this->age = $sql->getAge($id);
				
			}
			
		}
		
		public function numOfUsers() {
			
			$num = $sql->countAllUsers($query);
			
			return $num;
			
		}
		
		public function getUsername() {
			
			return $this->username;
			
		}
		
		public function getFirstname() {
			
			return $this->firstname;
			
		}
		
		public function getSecondname() {
			
			return $this->secondname;
			
		}
		
		public function getAge() {
			
			return $this->age;
			
		}
		
	};
	
	class UsersView extends View {
		
		$users = new users();
		
		for($i = 0; $i < $users->numOfUsers(); $i++) {
		
			$user = new users($i);
			echo "Username: {$user->getUsername()}";
			echo "Username: {$user->getFirstname()}";
			echo "Username: {$user->getSecondname()}";
			echo "Username: {$user->getAge()}";
			
		}
		
	};

?>

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.

What is the better way, in terms of best practice and also speed of storing PHP objects in a database? Is it:

Serialize
Code: [Select]
$SQL = "INSERT INTO my_table (my_object) VALUES ('" . seralize($php_object). "')";

OR

JSON
Code: [Select]
$SQL = "INSERT INTO my_table (my_object) VALUES ('" . json_encode($php_object). "')";

Any idea which is faster serialize() / unserialize() or json_ecode() / json_decode()?

I have a function that receives two datetime values attached to the variables $start and $end.  These will be in the format 'Y-m-d H:i:s'.

For each of these values, I create a DateTime object to make the handling of them easier:
Code: [Select]
$startDT = DateTime::createFromFormat('Y-m-d H:i:s', $start);
$endDT = DateTime::createFromFormat('Y-m-d H:i:s', $end);

What I need to do now is ensure that the seconds of the $startDT value are always set to '00' and the seconds of the $endDT value are always set to '59'.

Is there an easy way to do this without having to extract the individual values for hours, minutes and seconds before reapplying them using the setTime function, adjusting the values accordingly?

I was told that using a Session will allow me to capture an Object and pass it between pages.

I tried following what I read online and what someone sugegsted but it is not working.

This is the error I get when running my test application...

Quote

Catchable fatal error: Argument 1 passed to Microwave::receiveItem() must be an instance of Bowl, instance of __PHP_Incomplete_Class given, called in /Users/user1/Documents/DEV/++htdocs/Soup/cook.php on line 13 and defined in /Users/user1/Documents/DEV/++htdocs/Soup/classes/Soup.class.php on line 31
Call Stack
#   Time   Memory   Function   Location
1   0.0095   56412   {main}( )   ../cook.php:0
2   0.0101   68272   Microwave->receiveItem( )   ../cook.php:13


I would really appreciate it if someone could look at my code and see where the problem is at.

My guess is that it is in cook.php, but who knows?!

Attached is a ZIP of my entire directory structure.

Thanks,


TomTees

I have a page in which the print_r ($session) displays the following:

Array
(
    [securityToken] => 23b1f22bffd9f5097878618da57b14a2
    [cartID] => 
    [cart] => shoppingCart Object
        (
            [contents] => Array
                (
                )

            [total] => 0
            [weight] => 0
            [cartID] => 
            [content_type] => 
            [free_shipping_item] => 0
            [free_shipping_weight] => 0
            [free_shipping_price] => 0
        )

    [navigation] => navigationHistory Object
        (
            [path] => Array
                (
                    [0] => Array
                        (
                            [page] => index
                            [mode] => NONSSL
                            [get] => Array
                                (
                                    [cPath] => 2_9_843_845_852_856_858_863
                                )

                            [post] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [page] => product_info
                            [mode] => NONSSL
                            [get] => Array
                                (
                                    [cPath] => 2_9_843_845_852_856_858_863
                                    [products_id] => 2299
                                    [action] => add_product
                                )

                            [post] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [page] => shopping_cart
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [page] => checkout_shipping
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                    [4] => Array
                        (
                            [page] => checkout_payment
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                    [5] => Array
                        (
                            [page] => checkout_confirmation
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                    [6] => Array
                        (
                            [page] => checkout_process
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                    [7] => Array
                        (
                            [page] => checkout_success
                            [mode] => NONSSL
                            [get] => 
                            [post] => Array
                                (
                                )

                        )

                )

            [snapshot] => Array
                (
                )

        )

    [check_valid] => true
    [language] => english
    [languages_id] => 1
    [languages_code] => en
    [currency] => USD
    [today_is] => 2010-11-26
    [updateExpirations] => 1
    [session_counter] => 1
    [new_products_id_in_cart] => 2299
    [valid_to_checkout] => 1
    [cart_errors] => 
    [customer_id] => 2
    [customer_first_name] => test
    [customer_default_address_id] => 2
    [customer_country_id] => 223
    [customer_zone_id] => 2
    [customers_authorization] => 0
    [messageToStack] => 
    [payment_attempt] => 1
)
What I need to do is loop through the navigationHistory Object , grab the product id, and then get the cPath for that particular product id.  I have worked with sessions a lot, but I cannot seem to ever get the session object and loop thing down.  At this point I am ripping out my hair trying to figure out what is most likely a simple solution to this - can anyone help me?

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