The ReflectionParameter::getDefaultValueConstantName() function is an inbuilt function in PHP which is used to return the default value’s constant name if default value is constant or null.
Syntax:
string ReflectionParameter::getDefaultValueConstantName ( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns the default value’s constant name if default value is constant or null.
Below programs illustrate the ReflectionParameter::getDefaultValueConstantName() function in PHP:
Program 1:
<?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 getDefaultValueConstantName() function $B = $A ->getDefaultValueConstantName();
// Getting the default value's constant name // if default value is constant or null var_dump( $B );
?> |
Output:
string(13) "GeeksforGeeks"
Program 2:
<?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 getDefaultValueConstantName() function and // getting the default value's constant name if // default value is constant or null var_dump( $A ->getDefaultValueConstantName());
var_dump( $B ->getDefaultValueConstantName());
var_dump( $C ->getDefaultValueConstantName());
?> |
Output:
string(14) "Human_Resource" string(10) "Parameter3" string(17) "Digital_Marketing"
Reference: https://www.php.net/manual/en/reflectionparameter.getdefaultvalueconstantname.php