php：array（）和{}之间的区别[关闭]

what's the different between

Array
    (
        [user_id] => 1
        [username] => user
        [first_name] => hello
        [last_name] => world
    )

and

{
    user_id: "1",
    username:"user",
    first_name:"hello",
    last_name:"world"
}

? and how to convert them in php?

Edit: add details

Actually i'm using redis zunionstore and zrevrange to combine user data. The result returns me something like :

Array
(
    [0] =>{"user_id":"1","username":"user","first_name:hello","last_name:world"}
    [1] => ...
)

Since i have to process the data, i want something like this:

Array
(
    [0] => Array
        (
            [user_id] => 1
            [username] => user
            [first_name] => hello
            [last_name] => world
        )
 ...
)

So is there any easy way to convert it instead of using for loop to json_decode each element? Thx

The first string is the output of the print_r function. Example:

$array=array('key'=>'value');
print_r($array);

Outputs:

Array
(
    [key] => value
)

Your second is JSON-like, alto it lacks of double-quotes for keys.
You can't convert them directly.

You could convert JSON to a PHP array with json_decode if your second string was something like this:

{
    "user_id": "1",
    "username":"user"
    ...
}

The first one, as stated is PHP and second one is a JavaScript array.

To convert array to JSON, use json_encode();

To convert JavaScript array to JSON text and later to PHP array(associative); use JSON.stringify() and json_decode().

For your task, the best bet would be array_walk function:

array_walk( "json_decode", $MyArry );