I keep on stumbling on this PHP quirk and can't seem to explain myself why it's happening.
Why does this
new MyClass()->doSomething();
Trigger an error, while
(new MyClass())->doSomething();
and
$myObject = new MyClass();
$myObject->doSomething();
work as expected?
Is there a valid reason for needing the brackets around the constructor?
I found this RFC explaining that it was a conscious choice, but I still can't seem to understand the reason for it.
It seems just a design decision: https://wiki.php.net/rfc/instance-method-call
Moreover works well with function call chaining (https://wiki.php.net/rfc/fcallfcall) and dereferencing
Here the full discussion on PHP Internals ML: https://www.mail-archive.com/[email protected]/msg48787.html
MyClass() could be a function call which returns an object whose doSomething method returns a string which refers to a class which you're then trying to instantiate with new, i.e.:
$className = MyClass()->doSomething();
new $className;
The added () are for syntactical disambiguation.
new MyClass
returns a pointer on MyClass object then you can access your method like that
(new MyClass())->func();
because of the pointer
here
new MyClass()->func();
you don't access the pointer, then can't use your function and that's why you get an error
