(PHP 7) Gets the stack trace as a string abstract

(PHP 5 >= 5.0.0, PHP 7) Offset to retrieve

(PHP 5 >= 5.0.0, PHP 7) Checks if current position is valid

(PHP 5 >= 5.4.0, PHP 7) Duplicates the closure with a new bound object and class scope

(PHP 7) Binds and calls the closure public mixed

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

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

(PHP 7) Get the return value of a generator public

(PHP 7) Gets the exception code abstract public

(PHP 7) Gets the message abstract public string