PHP json_encode-创建JSON数组

Question

I've used the json_encode function in the past to create simply JSON objects like this:

$payload =  array ("user" => $username, "password" => $password, "group" => $group);
$payload = json_encode ($payload);

which creates this:

{"user":"john smith","password":"abc12345","group":"sales"}

I now need to generate a JSON array like this:

{
  "query": [
    {
      "Date": "11/01/2017...12/31/2017"
    }
  ]
}

but I can't find the correct syntax.

Answer 1

You can simply create a 2d array in php.

$payload =  array (
    "query" => array(
         array(
             "date" => "11/01/2017...12/31/2017",
             "other sub key" => "other sub value"
         )
    ),
    "other main key" => array(
         array(
             "other sub key" => "other sub value",
             etc...
         )
    )
);

Answer 2

That would be something like this

$array = array(
    'query' => array(
        array('Date' => '11-01-2017')
        )
    );


echo '<pre>';
print_r(json_encode($array, JSON_PRETTY_PRINT));

Result

{
    "query": [
        {
            "Date": "11-01-2017"
        }
    ]
}

Answer 3

$payload = json_encode($payload, JSON_PRETTY_PRINT);

参考： http : //php.net/manual/en/function.json-encode.php