PHP | ReflectionParameter isCallable() Function
Last Updated :
23 Dec, 2019
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The ReflectionParameter::isCallable() function is an inbuilt function in PHP which is used to return TRUE if the specified parameter is callable, FALSE otherwise.
Syntax:
php
php
bool ReflectionParameter::isCallable ( void )Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if the specified parameter is callable, FALSE otherwise. Below programs illustrate the ReflectionParameter::isCallable() function in PHP: Program 1:
<?php
// Initializing a user-defined class Company1
class Company1
{
public function GFG( callable $Parameter){}
}
// Initializing a subclass Company2
class Company2 extends Company1
{
}
// Using the ReflectionParameter over the above class
$A = new ReflectionParameter(['Company2', 'GFG'], 0);
// Calling the isCallable() function
$B = $A->isCallable();
// Getting TRUE if the specified parameter
// is callable, FALSE otherwise.
var_dump($B);
?>
<?php// Initializing a user-defined class Company1class Company1{ public function GFG( callable $Parameter){}} // Initializing a subclass Company2class Company2 extends Company1{} // Using the ReflectionParameter over the above class$A = new ReflectionParameter(['Company2', 'GFG'], 0); // Calling the isCallable() function$B = $A->isCallable(); // Getting TRUE if the specified parameter// is callable, FALSE otherwise.var_dump($B);?>
Output:
Program 2:
bool(true)
<?php
// Initializing some user-defined classes
class Department1
{
protected function HR( callable $Parameter1){}
}
class Department2
{
final function Coding( $Parameter2, $Parameter3){}
}
class Department3
{
function Marketing( sting $Parameter4,
string $Parameter5, string $Parameter6){}
}
// Using the ReflectionParameter over the above classes
$A = new ReflectionParameter(['Department1', 'HR'], 0);
$B = new ReflectionParameter(['Department2', 'Coding'], 1);
$C = new ReflectionParameter(['Department3', 'Marketing'], 2);
// Calling the isCallable() function and
// getting TRUE if the specified parameter
// is callable, FALSE otherwise.
var_dump($A->isCallable());
var_dump($B->isCallable());
var_dump($C->isCallable());
?>
<?php// Initializing some user-defined classesclass Department1{ protected function HR( callable $Parameter1){}}class Department2{ final function Coding( $Parameter2, $Parameter3){}}class Department3{ function Marketing( sting $Parameter4, string $Parameter5, string $Parameter6){}}// Using the ReflectionParameter over the above classes$A = new ReflectionParameter(['Department1', 'HR'], 0);$B = new ReflectionParameter(['Department2', 'Coding'], 1);$C = new ReflectionParameter(['Department3', 'Marketing'], 2);// Calling the isCallable() function and // getting TRUE if the specified parameter // is callable, FALSE otherwise.var_dump($A->isCallable());var_dump($B->isCallable());var_dump($C->isCallable());?>
Output:
Reference: https://www.php.net/manual/en/reflectionparameter.iscallable.php
bool(true) bool(false) bool(false)
