php - An object that can be used as an array as well -

all on place have array few elements, example:

$myitem = [ 'a' => 10, 'b' => 20 ] 

but replace class

$myclass = new myownclass( 10, 20 );

$a = $myclass->getsomevalue(); // old 'a' $b = $myclass->getsomeothervalue(); // old 'b' 

but practical reasons still want able call

$a = $myclass['a']; $b = $myclass['b']; 

is possible in php?

therefore, there interface named arrayaccess. have implement class.

class myownclass implements arrayaccess {     private $arr = null;      public function __construct($arr = null) {         if(is_array($arr))             $this->arr = $arr;         else             $this->arr = [];     }          public function offsetexists ($offset) {         if($this->arr !== null && isset($this->arr[$offset]))             return true;         return false;     }      public function offsetget ($offset) {         if($this->arr !== null && isset($this->arr[$offset]))             return $this->arr[$offset];         return false;     }      public function offsetset ($offset, $value) {         $this->arr[$offset] = $value;     }      public function offsetunset ($offset) {         unset($this->arr[$offset]);     } } 

use:

$arr = ["a" => 20, "b" => 30]; $obj = new myownclass($arr);  $obj->offsetget("a"); // gives 20 $obj->offsetset("b", 10); $obj->offsetget("b"); // gives 10