PHP Constructor And Destructor

PHP constructor automatically calls whenever a new object is created while the PHP destructor (php __destruct()) function executes automatically when the object is destroyed. The constructor in PHP is called when the object is created.

The magic method __construct() is known as a constructor that is automatically called whenever a new object is created.

Please keep in mind that the construct function starts with two underscores (__).

The __construct() method should always have public visibility.

When you don't have a constructor (or you have a constructor without arguments), you can create the object from the class without parentheses.

       
    class House{}
    $house = new House;//object

Source Code

          <?php
class Fruit {
  public $name;
  public $color;

  function __construct($name) {
    $this->name = $name;
  }
  function get_name() {
    return $this->name;
  }
}
$apple = new Fruit("Apple");
echo $apple->get_name();
?>

Try it now

But, if you have a constructor with arguments, you should send the values for those arguments when you create them.

Source Code

          <?php
class Fruit {
  public $name;
  public $color;

  function __construct($name, $color) {
    $this->name = $name;
    $this->color = $color;
  }
  function get_name() {
    return $this->name;
  }
  function get_color() {
    return $this->color;
  }
}

$apple = new Fruit("Apple", "red");
echo $apple->get_name();
echo "<br>";
echo $apple->get_color();
?>

Try it now

PHP Destructor Function

The destructor in php (__destruct()) is executed automatically when the object is destroyed. Keep in mind that the destructor function starts with two underscores (__).

Source Code

          <?php
class House {
	public $name;
	public $color;
	public function __construct($name, $color) {
		$this -> name = $name;
		$this -> color = $color;
	}
	public function __destruct() {
		echo "The color of the {$this -> name} is {$this -> color}";
	}
}
$blackHouse = new House("John's House", "black");
?>

Try it now

In the above example, the __destruct() method will be called at the end of the execution of the script.

Conclusion

I hope that you have understood the PHP class constructor as well as the PHP class destructor. Basically, it comes into action when a new object is created or destroyed, respectively. It is widely used during web development. Therefore, you must understand the constructor and the destructor.

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