HTTP API

get-followers.php

$token = get_transient( 'twitter_access_token' );
$token = ( empty( $token ) ) ? get_twitter_access_token() : $token;
$request = wp_remote_get('https://api.twitter.com/1.1/followers/ids.json?screen_name=danielpataki&count=5', array(
	'headers' => array(
		'Authorization' => 'Bearer ' . $token,
		'Content-Type' => 'application/x-www-form-urlencoded;charset=UTF-8'
	),
	'httpversion' => '1.1'
));
$token = json_decode( $request['body'] );

get-pins.php

$request = wp_remote_get( 'https://api.pinterest.com/v1/boards/marticz/home-office/pins/?access_token=<your access token>' );
$pins = json_decode( $request['body'], true );
if( !empty( $pins['data'] ) ) {
	echo '<ul>';
	foreach( $pins['data'] as $pin ) {
		echo '<li><a href="' . $pin['url'] . '">' . $pin['note']. '</a></li>';
	}
	echo '</ul>';
}

simple-get.php

$test = wp_remote_get( 'http://google.com' );
echo "<pre>"; 
var_dump($test); 
echo "</pre>";

twitter-auth.php

$key = base64_encode( urlencode( "n8KP16uvGZA6xvFTtb8IAA:i4pmOV0duXJv7TyF5IvyFdh5wDIqfJOovKjs92ei878" ) );
$request = wp_remote_post('https://api.twitter.com/oauth2/token', array(
	'headers' => array(
		'Authorization' => 'Basic ' . $key,
		'Content-Type' => 'application/x-www-form-urlencoded;charset=UTF-8'
	),
	'body' => 'grant_type=client_credentials',
	'httpversion' => '1.1'
));
$token = json_decode( $request['body'] );
echo "<pre>"; var_dump($token); echo "</pre>";