Call static method with class name stored as instance variable

Question

Consider this script

class B
{
    static public function hi() { echo \"hi\\n\"; }
}
class A
{
    private $name = \'B\';

    public function __construct()
             


        

Answer 1

The current implementation of Zend PHP parser supports only static method calls that are made directly on a class name or a variable. Here is the grammar:

%token T_PAAMAYIM_NEKUDOTAYIM ":: (T_PAAMAYIM_NEKUDOTAYIM)"

function_call:
    name argument_list
        { $$ = zend_ast_create(ZEND_AST_CALL, $1, $2); }
|   class_name T_PAAMAYIM_NEKUDOTAYIM member_name argument_list
        { $$ = zend_ast_create(ZEND_AST_STATIC_CALL, $1, $3, $4); }
|   variable_class_name T_PAAMAYIM_NEKUDOTAYIM member_name argument_list
        { $$ = zend_ast_create(ZEND_AST_STATIC_CALL, $1, $3, $4); }
|   callable_expr argument_list
        { $$ = zend_ast_create(ZEND_AST_CALL, $1, $2); }

Source: https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L890

Answer 2

Given that in your current circumstances you require a method of the class b within the class a, it seems pretty anti intuitive to approach it this way. Further, the the availability to call a method of another class is simply not there, you would need to use:

call_user_func(array($this->name, 'hi'));

one way is to simply require the B class as a depency of the constructor function of the A class:

class B
{
    static public function hi() { echo "hi\n"; }
}

class A
{
    private $b;

    public function __construct(B $b)
    {

        $b::hi();

    }
}
new A(new B);

This is probably as close to the one liner approach that you're looking for that you can get.