Difference between define() and const

Syntax

// Using define() functiondefine("CONSTANT_NAME", value);// Using const keyword (outside of class)const CONSTANT_NAME = value;...

Important Points

Constants defined using define( ) are global and can be defined anywhere in the script, including within functions or conditionals. Constants defined using const Keywords are class constants and can only be defined within classes or interfaces. A define() method is evaluated at runtime, whereas const the keyword is evaluated at compile time. Constants defined using const keywords are case-sensitive, whereas those defined using define() are case-insensitive by default....

Difference between define() and const

define() const keyword Defines constants at runtime Defines class constants at compile time Can be defined anywhere in the script Can only be defined within classes or interfaces Case-insensitive by default Case-sensitive by default Global scope Class scope...

Usage

Dynamic vs. Static Definition: define() allows dynamic definition of constants at runtime, while const keyword allows static definition within class or interface definitions. Scope: Constants defined using define() are global and can be accessed from anywhere in the script, while constants defined using const keyword are scoped to the class or interface in which they are defined. Case Sensitivity: Constants defined using const keyword are case-sensitive by default, whereas those defined using define() are case-insensitive unless explicitly specified....