How to traverse an array of objects by accessing each array element with PHP

PHP provides a way to define objects so that it can be iterated through a list of items, such as the foreach . By default, all visible properties will be used for iteration.

Example # 1 Simple Object Iteration

<?php
class MyClass
{
    public $var1 = 'value 1';
    public $var2 = 'value 2';
    public $var3 = 'value 3';

    protected $protected = 'protected var';
    private   $private   = 'private var';

    function iterateVisible() {
       echo "MyClass::iterateVisible:\n";
       foreach ($this as $key => $value) {
           print "$key => $value\n";
       }
    }
}

$class = new MyClass();

foreach($class as $key => $value) {
    print "$key => $value\n";
}
echo "\n";


$class->iterateVisible();

?>

The above example will print:

var1 => value 1
var2 => value 2
var3 => value 3

MyClass::iterateVisible:
var1 => value 1
var2 => value 2
var3 => value 3
protected => protected var
private => private var

As the output shows, the foreach passed through each of the visible variables that can be accessed.

Source: link

You can use foreach it works only on arrays and objetos , and will throw an error when trying to use it on a variable with a different data type or on an uninitialized variable.

foreach ($meu_array as $chave => $item_objeto){
    echo "Chave do Array: ".$chave."<br>";
    echo "id: ".$item_objeto->id;
    echo "first_name: ".$item_objeto->first_name;
    // Assim por diante ...
}

Documentation foreach