The ReflectionParameter::isDefaultValueAvailable() function is an inbuilt function in PHP which is used to return TRUE if a default value is available, otherwise FALSE
Syntax:
bool ReflectionParameter::isDefaultValueAvailable ( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns TRUE if a default value is available, otherwise FALSE.
Below programs illustrate the ReflectionParameter::isDefaultValueAvailable() function in PHP:
Program 1:
<?php   // Initializing a user-defined class Company1 class Company1 {     function GFG($Full_Name = 'neveropen'){} }    // Initializing a subclass Company2 class Company2 extends Company1 { }    // Using the ReflectionParameter over the above class $A = new ReflectionParameter(['Company2', 'GFG'], 0);    // Calling the isDefaultValueAvailable() function $B = $A->isDefaultValueAvailable();    // Getting TRUE if a default value is available, // otherwise FALSE var_dump($B); ?> |
Output:
bool(true)
Program 2:
<?php    // Initializing some user-defined classes class Department1 {     function HR( $Full_Name = 'Human Resource'){} } class Department2 {     function Coding( $Parameter2, $Parameter3){} } class Department3 {     function Marketing( $Parameter4, $Parameter5, $Parameter6){} }    // Using the ReflectionParameter over the above classes $A = new ReflectionParameter(['Department1', 'HR'], 0); $B = new ReflectionParameter(['Department2', 'Coding'], 1); $C = new ReflectionParameter(['Department3', 'Marketing'], 2);    // Calling the isDefaultValueAvailable() function and // getting TRUE if a default value is available, // otherwise FALSE var_dump($A->isDefaultValueAvailable()); var_dump($B->isDefaultValueAvailable()); var_dump($C->isDefaultValueAvailable()); ?> |
Output:
bool(true) bool(false) bool(false)
Reference: https://www.php.net/manual/en/reflectionparameter.isdefaultvalueavailable.php
