collection-multisort.php

<?php

// Requires Laravel

$json = <<<JSON
[{"name": "Taylor Otwell",
  "country": {
    "name": "United States"
  }
 },
 {"name": "Paulo Freitas",
  "country": {
    "name": "Brazil"
  }
 },
 {"name": "Taylor Otwell",
  "country": {
    "name": "Brazil"
  }
 }
]
JSON;

$users = collect(json_decode($json))->sort(function ($leftUser, $rightUser) {
    // Using PHP 7 spaceship operator
    return $leftUser->name <=> $rightUser->name
        ?: $leftUser->country->name <=> $rightUser->country->name;

    // Compatible with older PHP
    return strcmp($leftUser->name, $rightUser->name)
        ?: strcmp($leftUser->country->name, $rightUser->country->name);
});

var_dump($users->toArray());