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PHP | ReflectionParameter getDefaultValue() Function

Last Updated : 23 Dec, 2019
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The ReflectionParameter::getDefaultValue() function is an inbuilt function in PHP which is used to return the default value of the parameter for the specified user-defined function or method. Syntax:
 mixed ReflectionParameter::getDefaultValue ( void )
Parameters: This function does not accept any parameters. Return Value: This function returns the default value of the parameter for the specified user-defined function or method. Below programs illustrate the ReflectionParameter::getDefaultValue() function in PHP: Program 1: php
<?php

// Initializing a user-defined class Company1
class Company1
{
    function GFG($Full_Name = 'GeeksforGeeks'){}
}
 
// Initializing a subclass Company2
class Company2 extends Company1
{
}
 
// Using the ReflectionParameter over the above class
$A = new ReflectionParameter(['Company2', 'GFG'], 0); 
 
// Calling the getDefaultValue() function
$B = $A->getDefaultValue();
 
// Getting the default value of the parameter
var_dump($B);
?>
Output:
string(13) "GeeksforGeeks"
Program 2: php
<?php
 
// Initializing some user-defined classes
class Department1
{
    function HR( $Full_Name = 'Human Resource'){}
}
class Department2
{
    function Coding( $Parameter2, $Par3 = 'Parameter3'){}
}
class Department3
{
    function Marketing( $Parameter4 = 'Digital Marketing', $Parameter5){}
}
 
// Using the ReflectionParameter over the above classes
$A = new ReflectionParameter(['Department1', 'HR'], 0);
$B = new ReflectionParameter(['Department2', 'Coding'], 1);
$C = new ReflectionParameter(['Department3', 'Marketing'], 0);
 
// Calling the getDefaultValue() function and 
// getting the default value of the parameter
var_dump($A->getDefaultValue());
var_dump($B->getDefaultValue());
var_dump($C->getDefaultValue());
?>
Output:
string(14) "Human Resource"
string(10) "Parameter3"
string(17) "Digital Marketing"
Reference: https://www.php.net/manual/en/reflectionparameter.getdefaultvalue.php

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