Function overloading and Overriding in PHP

<?php
// PHP program to explain function 
// overloading in PHP

// Creating a class of type shape
class shape {
    
    // __call is magic function which accepts 
    // function name and arguments
    function __call($name_of_function, $arguments) {
            
        // It will match the function name
        if($name_of_function == 'area') {
            
            switch (count($arguments)) {
                    
                // If there is only one argument
                // area of circle
                case 1:
                    return 3.14 * $arguments[0];
                        
                // IF two arguments then area is rectangle;
                case 2:
                    return $arguments[0]*$arguments[1];
            }
        }
    }
}
    
// Declaring a shape type object
$s = new Shape;
    
// Function call 
echo($s->area(2));
echo "\n";
    
// calling area method for rectangle
echo ($s->area(4, 2));
?>

<?php
// PHP program to implement 
// function overriding

// This is parent class
class P {
    
    // Function geeks of parent class
    function geeks() {
        echo "Parent";
    }
}

// This is child class
class C extends P {
    
    // Overriding geeks method
    function geeks() {
        echo "\nChild";
    }
}

// Reference type of parent
$p = new P;

// Reference type of child
$c= new C;

// print Parent
$p->geeks();

// Print child
$c->geeks();
?>