1. Visit https://followerwonk.com/social-authority, log in with your Twitter account and click on "Get Access Credentials":
2. Use this PHP code, and replace the words in bold letters: 1) access ID, 2) secret key, 3) Twitter account.
$uri = 'https://api.followerwonk.com/social-authority';
$accessID = 'member-OTFjZTk0YzQtZTVmMC01NDJiLThjZjgtMjhlZTA4MjAzZGE1';
$secretKey = 'zhvfxoxxhkc9xiyobscugquskpvuffaf';
$time = time() + 500;
$signature = urlencode( base64_encode( hash_hmac( "sha1", "{$accessID}\n{$time}",
$secretKey, true ) ) );
$auth = "AccessID={$accessID};Timestamp={$time};Signature={$signature}";
$response = json_decode( file_get_contents( "{$uri}?screen_name=katyperry;{$auth}" ), true );
$social_authority = $response['_embedded'][0]['social_authority'];
echo $social_authority;