(PHP 7) Gets the message abstract public string

(PHP 5 >= 5.5.0, PHP 7) Check if the iterator has been closed

(PHP 5 >= 5.1.0, PHP 7) String representation of object

(PHP 7) Gets the exception code abstract public

(PHP 5 >= 5.5.0, PHP 7) Get the yielded key

(PHP 5 >= 5.5.0, PHP 7) Rewind the iterator

(PHP 5 >= 5.5.0, PHP 7) Serialize callback

(PHP 5 >= 5.0.0, PHP 7) Unset an offset abstract

(PHP 5 >= 5.0.0, PHP 7) Whether an offset exists

(PHP 7) Gets the line on which the object was instantiated