PHP | ReflectionClass getConstant() Function

0 0 1 minute read

The ReflectionClass::getConstant() function is an inbuilt function in PHP which is used to return the value of the defined constant.

Syntax:

mixed ReflectionClass::getConstant( string $name )

Parameters: This function accepts a parameter Name which is the name of the defined constant.

Return Value: This function returns the value of the defined constant.

Below programs illustrate the ReflectionClass::getConstant() function in PHP:

Program 1:

<?php 
  
// Declaring a class named as Department 
class Department { 
      
    // Defining a constant 
    const First = "CSE"; 
      
} 
  
// Using the ReflectionClass() function  
// over the Department class 
$A = new ReflectionClass('Department'); 
  
// Calling the getConstant() function over 
// First constant 
$a = $A->getConstant('First'); 
  
// Getting the value of the defined constant 
print_r($a); 
?> 

Output:

CSE

Program 2:

<?php 
    
// Declaring a class named as Company 
class Company { 
        
    // Defining a constant 
    const First = "zambiatek"; 
    const Second = "GFG"; 
    const Third = "gfg"; 
        
} 
    
// Using the ReflectionClass() function  
// over the Company class 
$A = new ReflectionClass('Company'); 
    
// Calling the getConstant() function over 
// the defined constants and 
// getting the value of the defined constants 
print_r($A->getConstant('First')); 
echo("\n"); 
print_r($A->getConstant('Second')); 
echo("\n"); 
print_r($A->getConstant('Third')); 
?> 