Usage is super simple and well-documented. Here's a short example:
use Navarr\Minecraft\Profile;
$profile = Profile::fromUuid('bd95beec116b4d37826c373049d3538b');
$username = $profile->name;
$cape = $profile->capeUrl;
$skin = $profile->skinUrl;
MinecraftProfile uses Composer. For more information about composer, read the Getting Started document.
To install with composer:
composer install navarr/minecraft-profile