Usage of php constants. Note: Unlike other object-oriented programming languages, in php, classes cannot use final modifiers for an attribute variable. To declare an attribute as a constant, you can use the const keyword.
Note:Unlike other object-oriented programming languages, in php, classes cannot use final modifiers for an attribute variable.
If you want to declare an attribute as a constant, you can use the const keyword, without using the dollar symbol as the variable name prefix or access permission modifier. A constant means that although the variable can be accessed, the value of the variable cannot be modified. For example, the following code declares the constant attribute con_var:
The code is as follows:
Class Foo {
Const con_var = "The value of the constant attribute cannot be modified.
";
Public function method_a (){
Echo (self: con_var );
}
}
Echo (Foo: con_var );
$ MyFoo = new Foo ();
Echo ($ myFoo-> method_a ());
?>
Constant attributes cannot be accessed by objects. they can only be accessed by classes. in the class body, you can use "self: constant name" and use "class name :: constant name ".
Unlike other object-oriented programming languages, in php, classes cannot use final modifiers for an attribute variable. To declare an attribute as a constant, you can use the const keyword...
