PHP. Yii. How to make one multidimensional array for two one-dimensional arrays?

Question

Yii

There are two arrays

array('0'=>'x', '1'=>'xx', '2'=>'xxx', '3'=>'xxxx',)

and

array('0'=>'y', '1'=>'yy', '2'=>'yyy', '3'=>'yyyy',)

How to make an array of the form:

array(
array('0'=>'x', '1'=>'xx', '2'=>'xxx', '3'=>'xxxx',),
array('0'=>'y', '1'=>'yy', '2'=>'yyy', '3'=>'yyyy',),
)

UPD:
All this is written in Yii. Controller:

$cars=AutoCars::model()->findAll();
$allCars=array();
foreach ($cars as $car) {
         $deCar=CJSON::decode($car->params, true);
         $allCars[]=$deCar; //на этом месте исключение
}

An exception is thrown:

htmlspecialchars() expects parameter 1 to be string, array given

It’s clear why the error is, but it’s not clear what place htmlspecialchars() got in here? And how do you make sure everyone is happy?

Answer 1

<?

$a = array();

$b = array("c" => "2");

$c = array("d" => "3");

$a[] = $b;
$a[] = $c;

the first thing that came to my mind) I'm sure that you can also merge with standard functions (array_push etc)
I didn’t work very tightly with yii (for which I am very glad): D
www.yiiframework.com/doc/api/1.1/CJSON
Uses json_decode / json_encode if they are, and accordingly a string is required for input, because if you pass an array, then there will be an error.
$car->params - an array, but it must be a string