foreach with php and poo

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foreach with php and poo

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#1 by (4 votes)

2

I'm learning PHP with POO and I wanted to print an array with foreach with an object and it worked for me:

class padre
{

    function __construct()
    {
        $nombres = ["Perengano", "sutano", "chilindrina"];
        foreach ($nombres as $name) {
            echo "$name <br>";
        }
    }
}
$a = new padre;

But now I want to do it calling the array from an attribute but it does not come out or I do not know if it can be done the way I look.

I hope your help and if you can, some advice to improve my learning in PHP, greetings and thanks in advance =)

php

asked by user23028 28.03.2018 в 07:13

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1 answer

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score 4 · Accepted Answer

You can do it this way, you declare the structure of the class, but instead of using a __construct method that seeks to give values to a default class you can use a named method; that is to say a function likewise to use a foreach is ideal better to declare an associative array that is to say of key-value

At the end when creating the instance of the class to the object named $ a we can in the last line give an echo to that object by accessing the print method that will return the results of said array

Look at the example

class Datos
{
    protected $nombres;

    function imprimir()
    {
        $this->nombres = array("valor1" => "Perengano","valor2" => "sutano","valor3" => "chilindrina");
        foreach ($this->nombres as $key => $value)
        {
            echo $value.PHP_EOL;
        }
    }
} 

$a = new Datos;
echo $a->imprimir();

The key and value details are for:

$ key returns for example $ value1, $ value2 and $ value3

$ value returns the values associated with the keys of point one

On the other hand, the names of the classes must be capitalized and have reference to the content of said class

On the other hand you should always indicate the scope of a property, within which you have public, private and protected; the ideal is that they are not public so that they are not modifiable outside the class that declared them

Now if you want to use the constructor to initialize a property at the time of creating the class it would be this way and it remains functional

class Datos
{
    protected $nombres;

    public function __construct()
    {
        $this->nombres = array("valor1" => "Perengano","valor2" => "sutano","valor3" => "chilindrina");
    }

    function imprimir()
    {
        foreach ($this->nombres as $key => $value)
        {
            echo $value.PHP_EOL;
        }
    }
} 

$a = new Datos();
echo $a->imprimir();