PHP | ReflectionMethod isAbstract() Function

The ReflectionMethod::isAbstract() function is an inbuilt function in PHP which is used to return TRUE if the specified method is abstract, otherwise FALSE.

Syntax:

bool ReflectionMethod::isAbstract ( void )

Parameters: This function does not accept any parameter.

Return Value: This function returns TRUE if the specified method is abstract, otherwise FALSE.

Below programs illustrate the ReflectionMethod::isAbstract() function in PHP:
Program_1:

<?php

// Initializing a user-defined abstract class
abstract class Company {

    abstract function GFG();
}

// Using ReflectionMethod() over the class Company
$A = new ReflectionMethod('Company', 'GFG');

// Calling the isAbstract() function
$B = $A->isAbstract();

// Getting the value TRUE if the specified
// method is abstract, otherwise FALSE.
var_dump($B);
?>

Output:

bool(true)

Program_2:

<?php

// Initializing some user-defined classes
class Department1 {

    public function hr($name) {
        return 'HR' . $name;
    }
}
class Department2 {

    public function coding($name) {
        return 'Coding' . $name;
    }
}
abstract class Department3 {

    abstract function marketing();
}

// Using ReflectionMethod() over the above classes
$A = new ReflectionMethod('Department1', 'hR');
$B = new ReflectionMethod('Department2', 'coding');
$C = new ReflectionMethod('Department3', 'marketing');

// Calling the isAbstract() function and
// getting the value TRUE if the specified
// method is abstract, otherwise FALSE.
var_dump($A->isAbstract());
var_dump($B->isAbstract());
var_dump($C->isAbstract());
?>

Output:

bool(false)
bool(false)
bool(true)

Reference: https://www.php.net/manual/en/reflectionmethod.isabstract.php