Php-ArrayAccess interface

The pre-defined PHP interface-ArrayAccess interface provides interfaces that can access objects just like an array.

Interface abstract

ArrayAccess {/* method */abstract public boolean offsetExists (mixed $ offset) abstract public mixed offsetGet (mixed $ offset) abstract public void offsetSet (mixed $ offset, mixed $ value) abstract public void offsetUnset (mixed $ offset )}

Example #1 Example

 container = array(                "one" => 1,                "two" => 2,                "three" => 3,            );        }        public function offsetSet($offset, $value) {            if (is_null($offset)) {                $this->container[] = $value;            } else {                $this->container[$offset] = $value;            }        }        public function offsetExists($offset) {            return isset($this->container[$offset]);        }        public function offsetUnset($offset) {            unset($this->container[$offset]);        }        public function offsetGet($offset) {            return isset($this->container[$offset]) ? $this->container[$offset] : null;        }    }    $obj = new obj;    var_dump(isset($obj["two"]));    var_dump($obj["two"]);    unset($obj["two"]);    var_dump(isset($obj["two"]));    $obj["two"] = "A value";    var_dump($obj["two"]);    $obj[] = 'Append 1';    $obj[] = 'Append 2';    $obj[] = 'Append 3';    print_r($obj);?>

The output of the preceding routine is similar:

bool(true)int(2)bool(false)string(7) "A value"obj Object(    [container:obj:private] => Array        (            [one] => 1            [three] => 3            [two] => A value            [0] => Append 1            [1] => Append 2            [2] => Append 3        ))

Method list

ArrayAccess: offsetExists-check whether an offset exists.

ArrayAccess: offsetGet-obtains the value of an offset.

ArrayAccess: offsetSet-set the value of an offset.

ArrayAccess: offsetUnset-reset the value of an offset.