PHP | ReflectionClass isInstantiable() Function

The ReflectionClass::isInstantiable() function is an inbuilt function in PHP which is used to check the specified class is instantiable or not.

Syntax:

bool ReflectionClass::isInstantiable( void )

Parameters: This function does not accept any parameters.

Return Value: This function returns TRUE if the specified class is instantiable, otherwise return FALSE.

Below programs illustrate the ReflectionClass::isInstantiable() function in PHP:

Program 1:

<?php

// Initializing a user-defined Class Departments
class Departments {
    public function CSE() { }
}

// Using ReflectionClass() over the
// user-defined class Departments
$class = new ReflectionClass('Departments');

// Calling the isInstantiable() function
$instance = $class->isInstantiable();

// Getting the value true or false
var_dump($instance);
?>

Output:

bool(true)

Program 2:

<?php

// Initializing a interface named as TestFunction
interface TestFunction {
    function F1();
    function F2();
}

// Using ReflectionClass() over the
// specified interface
$class = new ReflectionClass('TestFunction');

// Calling the isInstantiable() function and
// getting the value true or false
var_dump($class->isInstantiable());
?>

Output:

bool(false)

Reference: https://www.php.net/manual/en/reflectionclass.isinstantiable.php