Tag: constructor

Can you return another instance of the same class from the constructor function (Singleton Pattern)?

I just came across an answer to another question, https://stackoverflow.com/a/32954854/1682790 In that answer, they use the following: But everything else I’ve seen seems to contradict this section of code, namely that in PHP a constructor always returns the object that’s been instantiated, and ignores the return statement altogether. If that’s actually the case, then this isn’t actually creating a singleton,

PHP Class for adding two numbers

addition class constructor object php

I am doing a challenge in PHP with OOP/classes and I am not sure why I am not passing the test case for two random numbers being added together. My syntax must be off somewhere, but I am very new to PHP so I am having trouble figuring it out. Here are the instructions for my challenge: Write a class

static property not initialised when constructor is called php

constructor inheritance order-of-execution php properties

I have a parent class like so: abstract class UiElement { protected static ?string $template_name = null; public function __construct() { if(static::$template_name == null) { …

how to use function from another class in flight php

constructor php

I am new in flight php. I need some help, I create two classes client.class.php and deliveryServiceConnector.class.php and i have index.php. I want to use function from deliveryServiceConnector.class.php in client.class.php so I write this code: I got this error: Undefined variable: connector (8) Any idea how can i fix my error, Thanks Answer You’re not using the same thing for

How do I pass specific optional arguments?

class constructor optional-arguments php

I have 2 cases. Case 1: pass the name and age. Case 2: pass name and gender. How can I do this? class User { function __construct($name=NULL, $gender=NULL, $age=NULL) { … } } //…

PHP – constructor with SQL query [closed]

constructor mysql oop php

Option 1: query the data first and then pass the data to the constructor Option 2: use the constructor to query the data and then fill the properties Option 1 Example $val1 = 1; $query = mysql_query(&…

What am I doing wrong with my optional PHP arguments?

class constructor php

I have a the following class: So from my interpretation I should be able to pass either $id or $humanIdentifier to that constructor, neither or both if I wanted. However, when I call the code below I am finding that its the $id in the constructor args being set to hello world and not the $humanIdentifier, despite me specifying the

PHP Traits: How to circumvenient constructors or force them to be called?

constructor inheritance php traits

Have a look at the following trait: As you can see the trait makes sure that the using class holds a certain model instance and it implements certain methods. This works as long as the implementing class does not override the constructor. So here is my question: I want to make sure that either the constructor is called or a

Any way to simplify PHP constructor arguments?

constructor php simplify variable-assignment

When I want to pass values into a PHP constructor I have to go: class Rump { private $var1; private $var2; private $var3; public function __construct($var1, $var2, $var3) { $…

Codeigniter variables from constructor are undefined

codeigniter constructor function global php

I’m using CI’s Auth Tank library to query records for certain users. The variable $user_id = tank_auth->get_user_id(); grabs the user id from the session. I want to pull records where user_id = $user_id. From what I understood, constructors can load variables each time a class is initiated. Sort of like global variables. So I figured I’ll set my $user_id in