PHP | ReflectionClass getReflectionConstants() Function

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The ReflectionClass::getReflectionConstants() function is an inbuilt function in PHP which is used to return an array of ReflectionClassConstant objects.

Syntax:

array ReflectionClass::getReflectionConstants( void )

Parameters: This function does not accept any parameters.

Return Value: This function returns an array of ReflectionClassConstant objects.

Below programs illustrate the ReflectionClass::getReflectionConstants() function in PHP:
Program 1:

<?php 
  
// Declaring a class named as Company 
class Company { 
      
    // Defining some constants 
    const First = "zambiatek"; 
    const Second = "GFG"; 
} 
  
// Using the ReflectionClass() function  
// over the Company class 
$A = new ReflectionClass('Company'); 
  
// Calling the getReflectionConstants() function 
$a = $A->getReflectionConstants(); 
  
// Getting an array of ReflectionClassConstant objects. 
print_r($a); 
?> 

Output:

Array
(
    [0] => ReflectionClassConstant Object
        (
            [name] => First
            [class] => Company
        )

    [1] => ReflectionClassConstant Object
        (
            [name] => Second
            [class] => Company
        )

)

Program 2:

<?php 
  
// Using the ReflectionClass() function  
$A = new ReflectionClass('ReflectionClass'); 
  
// Calling the getReflectionConstants() function 
$a = $A->getReflectionConstants(); 
  
// Getting an array of ReflectionClassConstant objects. 
print_r($a); 
?> 

Output:

Array
(
    [0] => ReflectionClassConstant Object
        (
            [name] => IS_IMPLICIT_ABSTRACT
            [class] => ReflectionClass
        )

    [1] => ReflectionClassConstant Object
        (
            [name] => IS_EXPLICIT_ABSTRACT
            [class] => ReflectionClass
        )

    [2] => ReflectionClassConstant Object
        (
            [name] => IS_FINAL
            [class] => ReflectionClass
        )

)

Reference: https://secure.php.net/manual/en/reflectionclass.getreflectionconstants.php