Php/docs/class.arrayaccess
(PHP 5, PHP 7, PHP 8)
Introduction
Interface to provide accessing objects as arrays.
Interface synopsis
ArrayAccess {
abstract public offsetExists
( mixed $offset
) : bool
abstract public offsetUnset
( mixed $offset
) : void
}
Example #1 Basic usage
<?phpclass Obj implements ArrayAccess { private $container = array(); public function __construct() { $this->container = array( "one" => 1, "two" => 2, "three" => 3, ); } public function offsetSet($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 above example will output something similar to:
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
)
)
Table of Contents
- ArrayAccess::offsetExists — Whether an offset exists
- ArrayAccess::offsetGet — Offset to retrieve
- ArrayAccess::offsetSet — Assign a value to the specified offset
- ArrayAccess::offsetUnset — Unset an offset
/* Methods */