In PHP, how do I iterate over objects with examples?

In PHP, you can iterate over objects using a variety of methods. The two most common approaches are using a foreach loop and implementing the Iterator interface. Below are examples illustrating both methods.

Example of iterating over an object using a foreach loop:


            <?php
            class Person {
                public $name;
                public $age;

                public function __construct($name, $age) {
                    $this->name = $name;
                    $this->age = $age;
                }
            }

            $person = new Person("John", 30);
            foreach ($person as $property => $value) {
                echo "$property: $value\n";
            }
            ?>

Example of iterating over an object using the Iterator interface:


            <?php
            class Person implements Iterator {
                private $people = [];
                private $position = 0;

                public function __construct() {
                    $this->people = [
                        "John" => 30,
                        "Jane" => 25,
                    ];
                }

                public function current() {
                    return $this->people[$this->key()];
                }

                public function key() {
                    return array_keys($this->people)[$this->position];
                }

                public function next() {
                    ++$this->position;
                }

                public function rewind() {
                    $this->position = 0;
                }

                public function valid() {
                    return isset($this->people[$this->key()]);
                }
            }

            $person = new Person();
            foreach ($person as $name => $age) {
                echo "$name: $age\n";
            }
            ?>

In PHP, how do I iterate over objects with examples?

Popular Topics

Recent Languages

In PHP, how do I iterate over objects with examples?

Related Questions

Popular Topics

Recent Languages