PHP Array to JSON

PhpArrayToJSON.php

<?php
$datos = [
    "title"=> "Property title",
    "category_id"=> "MLU1468",
    "price"=> 100000,
    "currency_id"=> "UYU",
    "available_quantity"=> 1,
    "buying_mode"=> "classified",
    "listing_type_id"=> "silver",
    "condition"=> "not_specified",
    "pictures"=> [
        [ "source" => "http=>//mla-d2-p.mlstatic.com/item-de-test-no-ofertar-543605-MLA25041518406_092016-O.jpg?square=false" ]
    ],
    "seller_contact" => [
        "contact"=> "Contact name",
        "other_info"=> "Additional contact info",
        "area_code"=> "011",
        "phone"=> "4444-5555",
        "area_code2"=> "",
        "phone2"=> "",
        "email"=> "contact-email@somedomain.com",
        "webmail"=> ""
    ],
    "location"=> [
        "address_line"=> "My property address 1234",
        "zip_code"=> "01234567",
        "neighborhood"=> [
            "id"=> "TUxBQlBBUzgyNjBa"
        ],
        "latitude"=> -34.48755,
        "longitude"=> -58.56987
    ],
    "attributes"=> [
        [ "id"=> "MLU1466-AMBIENTES", "value_name"=> "2" ]
    ],
    "description"=> "This is the real estate property descritpion."
];

print json_encode($datos);
?>