How to add methods dynamically

Question

I\'m trying to add methods dynamically from external files. Right now I have __call method in my class so when i call the method I want, __call inc

Answer 1

You can dynamically add attributes and methods providing it is done through the constructor in the same way you can pass a function as argument of another function.

class Example {
    function __construct($f)
    {
       $this->action=$f;
    }
}

function fun() {
   echo "hello\n";
}

$ex1 = new class('fun');

You can not call directlry $ex1->action(), it must be assigned to a variable and then you can call this variable like a function.

Answer 2

Is this what you need?

$methodOne = function ()
{
    echo "I am  doing one.".PHP_EOL;
};

$methodTwo = function ()
{
    echo "I am doing two.".PHP_EOL;
};

class Composite
{
    function addMethod($name, $method)
    {
        $this->{$name} = $method;
    }

    public function __call($name, $arguments)
    {
        return call_user_func($this->{$name}, $arguments);
    }
}


$one = new Composite();
$one -> addMethod("method1", $methodOne);
$one -> method1();
$one -> addMethod("method2", $methodTwo);
$one -> method2();

Answer 3

I've worked up the following code example and a helper method which works with __call which may prove useful. https://github.com/permanenttourist/helpers/tree/master/PHP/php_append_methods

Answer 4

if i read the manual right, the __call get called insted of the function, if the function dosn't exist so you probely need to call it after you created it

Class myClass
{
    function __call($name, $args)
    {
        require_once($name.".php");
        $this->$name($args);
    }
}

Answer 5

You can create an attribute in your class : methods=[]
and use create_function for create lambda function.
Stock it in the methods attribute, at index of the name of method you want.
use :

function __call($method, $arguments)
{
   if(method_exists($this, $method))
      $this->$method($arguments);
   else
      $this->methods[$method]($arguments);
}

to find and call good method.

Answer 6

/**
 * @method Talk hello(string $name)
 * @method Talk goodbye(string $name)
 */
class Talk {
    private $methods = [];
    
    public function __construct(array $methods) {
        $this->methods = $methods;
    }
    
    public function __call(string $method, array $arguments): Talk {
        if ($func = $this->methods[$method] ?? false) {
            $func(...$arguments);
            
            return $this;
        }
        
        throw new \RuntimeException(sprintf('Missing %s method.'));
    }
}

$howdy = new Talk([
    'hello' => function(string $name) {
        echo sprintf('Hello %s!%s', $name, PHP_EOL);
    },
    'goodbye' => function(string $name) {
        echo sprintf('Goodbye %s!%s', $name, PHP_EOL);
    },
]);

$howdy
    ->hello('Jim')
    ->goodbye('Joe');

https://3v4l.org/iIhph