How to add a method inside the constructor class in PHP? - php

Question

I have a class A which needs a new method if one of its arguments is set up to true.
Class A
Class A{
private $is_new_method;
public function __construct( $is_new_method = false, $new_method_name = "" ){
$this->is_new_method = $is_new_method;
if( $this->is_new_method ){
//TODO : add new method in this class based on $new_method_name
}
}
}
I saw runkit_method_add but it needs (PECL runkit >= 0.7.0).
Notice: this function will be call inside a core of a framework like this :
$foo = new A();
$foo->myNewFunction();
So what is the best way to do this ?

Answer 1

$a = new Inflector([
'foo' => function($val){echo sprintf('%s calls foo()', $val[0] ?? 'none!').PHP_EOL;},
'bar' => function($val){echo sprintf('%s calls bar()', $val[0] ?? 'none!').PHP_EOL;},
'baz' => function($val){echo sprintf('%s calls baz()', $val[0] ?? 'none!').PHP_EOL;},
]);
$a->foo('Ahnold');
$a->bar('Elvis');
$a->baz('Lerhman');
$a->theBreaks('Who');
class Inflector
{
private $methods = [];
public function __construct(array $methods)
{
$this->methods = $methods;
//var_dump($this->methods);
}
public function __call(string $methodName, $params)
{
if (isset($this->methods[$methodName])) {
$this->methods[$methodName]($params);
}
throw new InflectionDeceptionException();
}
}
class InflectionDeceptionException extends \Exception
{
public function __construct($message = "Say what?")
{
return parent::__construct($message);
}
}
https://3v4l.org/kLdOp
Gives:
Ahnold calls foo()
Elvis calls bar()
Lerhman calls baz()

Answer 2

Thanks #Jared Farrish !
I found my solution based on your recommandation.
Class A{
private $is_new_method;
private $new_method;
public function __construct( $is_new_method = false, $new_method_name = "" ){
$this->is_new_method = $is_new_method;
if( $this->is_new_method ){
$new_method = $this->make_my_new_method( $new_method_name );
}
}
private function make_my_new_method( $method_name ){
$functionName = "foo_" . $method_name;
$$functionName = function ( $item ) {
print_r( $item );
}
return $$functionName;
}
public function __call( $method, $args){
if ( isset( $this->new_method ) ) {
$func = $this->new_method;
return call_user_func_array( $func, $args );
}
}
}