Converts the pair to an array.
Note:
Casting to an array is not supported yet.
此函数没有参数。
An array containing all the values in the same order as the pair.
Example #1 Ds\Pair::toArray() example
<?php
$pair = new \Ds\Pair("a", 1);
var_dump($pair->toArray());
?>
以上例程的输出类似于：
array(2) {
["key"]=>
string(1) "a"
["value"]=>
int(1)
}