The property stream cannot be accessed from this context as it is declared private in class Zend\Diactoros\MessageTrait.
This check looks for access to properties that are not accessible from the current context.
If you need to make a property accessible to another context you can either raise its
visibility level or provide an accessible getter in the defining class.
The return type of return $this; (PhpBootstrap\Services\Response) is incompatible with the return type declared by the interface PhpBootstrap\Contracts\Response::asJSON of type self.
If you return a value from a function or method, it should be a sub-type of the
type that is given by the parent type f.e. an interface, or abstract method.
This is more formally defined by the
Lizkov substitution principle,
and guarantees that classes that depend on the parent type can use any instance
of a child type interchangably. This principle also belongs to the
SOLID principles
for object oriented design.
Our function my_function expects a Post object, and outputs the author
of the post. The base class Post returns a simple string and outputting a
simple string will work just fine. However, the child class BlogPost which
is a sub-type of Post instead decided to return an object, and is
therefore violating the SOLID principles. If a BlogPost were passed to
my_function, PHP would not complain, but ultimately fail when executing the
strtoupper call in its body.
The return type of return $this; (PhpBootstrap\Services\Response) is incompatible with the return type declared by the interface PhpBootstrap\Contracts\Response::asHTML of type self.
If you return a value from a function or method, it should be a sub-type of the
type that is given by the parent type f.e. an interface, or abstract method.
This is more formally defined by the
Lizkov substitution principle,
and guarantees that classes that depend on the parent type can use any instance
of a child type interchangably. This principle also belongs to the
SOLID principles
for object oriented design.
Our function my_function expects a Post object, and outputs the author
of the post. The base class Post returns a simple string and outputting a
simple string will work just fine. However, the child class BlogPost which
is a sub-type of Post instead decided to return an object, and is
therefore violating the SOLID principles. If a BlogPost were passed to
my_function, PHP would not complain, but ultimately fail when executing the
strtoupper call in its body.
This check looks for access to methods that are not accessible from the current context.
If you need to make a method accessible to another context you can raise its visibility level in the defining class.