Using the official Parse PHP SDK v1.0

parse.php

<?php

// define location of Parse PHP SDK, e.g. location in "Parse" folder
// Defaults to ./Parse/ folder. Add trailing slash
define( 'PARSE_SDK_DIR', './Parse/' );

// include Parse SDK autoloader
require_once( 'autoload.php' );

// Add the "use" declarations where you'll be using the classes
use Parse\ParseClient;
use Parse\ParseObject;
use Parse\ParseQuery;
use Parse\ParseACL;
use Parse\ParsePush;
use Parse\ParseUser;
use Parse\ParseInstallation;
use Parse\ParseException;
use Parse\ParseAnalytics;
use Parse\ParseFile;
use Parse\ParseCloud;

// Init parse: app_id, rest_key, master_key
ParseClient::initialize('xxx', 'yyy', 'zzz');

// save something to class TestObject
$testObject = ParseObject::create("TestObject");
$testObject->set("foo", "bar");
$testObject->save();

// get the object ID
echo $testObject->getObjectId();

echo '<h1>Users</h1>';

// get the first 10 users from built-in User class
$query = new ParseQuery("_User");
$query->limit(10);
$results = $query->find();

foreach ( $results as $result ) {
  // echo user Usernames
  echo $result->get('username') . '<br/>';
}