What is Parameterized constructor in PHP? Explain with Example

Parameterized constructor 

• Parameterized constructor is a constructor that accepts parameter and is normally used to initialize member variables at the time of object creation.
• The constructor of the class accepts arguments or parameters

Example:

<form action="" method="post">

Enter Code:<input type="text" name="code" value="" /><br />

Enter Name:<input type="text" name="name" value="">

<br />

<input type="submit" name="sb" value="Click" />

</form>

<?php

//Paramiterrized Constructor

$code = $_POST['code'];

$name = $_POST['name'];

class Employee

{

var $empcode;

var $empname;

function Employee($code,$name)

/*class name and function name are same but different variable passed as known as a parameterized constructor*/

{

$this->empcode = $code;

$this->empname = $name;

}

function display()

{

echo " <h1><br>";

echo "<br> Employee Code : " . $this->empcode;

echo "<br> Employee Name : " . $this->empname;

echo "</h1>";

}

};

$object = new Employee($code,$name);

$object -> display();

?>

What is destructor? explain with example in php

 DESTRUCTOR

• A destructor is called when the object is destroyed.
• A destructor is a special method called automatically during the destruction of an object. Actions executed in the destructor include the following
• Recovering the heap space allocated during the lifetime of an object
• Closing file or database connections
• Releasing network resources
• Releasing resource locks
• Other housekeeping tasks

Example of Constructor and Destructor:

<?php

class dclass

{

    public $name = "Youtube with Avadh Tutor";    

    public function __construct($name)

    {

        echo "<font color=blue>By default Constructor</font>";    

        $this->name = $name;

    }

    

    public function __destruct()

    {

        echo "<font color=orange>Class with destructor Call </font>";

//$this->name = $name; /*error*/

    }

}

$d = new dclass("Argument");

echo "<br><br>Name of the Channel: " . $d->name;

/* destruct call after object destroy*/

?>