You want to create a class Config with constants for environment settings. Which approach correctly defines and accesses a constant ENV with value 'production' from outside the class?

hard📝 Application Q8 of 15

PHP - Classes and Objects

You want to create a class Config with constants for environment settings. Which approach correctly defines and accesses a constant ENV with value 'production' from outside the class?

Aclass Config { const ENV = 'production'; } echo Config::ENV;

Bclass Config { public $ENV = 'production'; } echo Config::ENV;

Cclass Config { const ENV = 'production'; } echo Config->ENV;

Dclass Config { define('ENV', 'production'); } echo Config::ENV;

Step-by-Step Solution

Solution:

Step 1: Define constant correctly
Use const keyword inside class to define ENV constant.
Step 2: Access constant from outside class
Use ClassName::CONSTANT syntax to access it.
Final Answer:
class Config { const ENV = 'production'; } echo Config::ENV; -> Option A
Quick Check:
Define with const and access with :: [OK]

Quick Trick: Define with const, access with ClassName::CONST [OK]

Common Mistakes:

Using public property instead of constant
Using -> instead of :: to access constant
Using define() inside class

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You want to create a class Config with constants for environment settings. Which approach correctly defines and accesses a constant ENV with value 'production' from outside the class?

Step 1: Define constant correctly

Step 2: Access constant from outside class

Final Answer:

Quick Check:

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