ArrayAccess::offsetGet
(PHP 5 >= 5.0.0)
ArrayAccess::offsetGet — Offset to retrieve
설명
abstract public mixed ArrayAccess::offsetGet
(
mixed $offset
)
This method is executed when checking if offset is empty().
인수
-
offset
-
The offset to retrieve.
주의
Note:
Starting with PHP 5.3.4, the prototype checks were relaxed and it's
possible for implementations of this method to return by reference.
This makes indirect modifications to the overloaded array dimensions of
ArrayAccess objects possible.
A direct modification is one that replaces completely the value of
the array dimension, as in $obj[6] = 7. An
indirect modification, on the other hand, only changes part of the
dimension, or attempts to assign the dimension by reference to
another variable, as in $obj[6][7] = 7 or
$var =& $obj[6]. Increments with
++ and decrements with --
are also implemented in a way that requires indirect modification.
While direct modification triggers a call to
ArrayAccess::offsetSet(), indirect modification
triggers a call to ArrayAccess::offsetGet().
In that case, the implementation of
ArrayAccess::offsetGet() must be able to return by
reference, otherwise an E_NOTICE message is raised.
반환값
Can return all value types.