Show the number of followers of a Twitter account.

twitter-followers-count

<?php 

/* 
 * Requires the "Twitter API" wrapper by James Mallison 
 * to be found at https://github.com/J7mbo/twitter-api-php
 *
 * The way how to get a follower count was posted by Amal Murali
 * on http://stackoverflow.com/questions/17409227/follower-count-number-in-twitter
 */

require_once('TwitterAPIExchange.php'); 				// adjust server path accordingly

// GET YOUR TOKENS AND KEYS at https://dev.twitter.com/apps/
$settings = array(
'oauth_access_token' => "YOUR_ACCESS_TOKEN",				// enter your data here
'oauth_access_token_secret' => "YOUR_ACCESS_TOKEN_SECRET",		// enter your data here
'consumer_key' => "YOUR_CONSUMER_KEY",					// enter your data here
'consumer_secret' => "YOUR_CONSUMER_KEY_SECRET"				// enter your data here
);

$ta_url = 'https://api.twitter.com/1.1/statuses/user_timeline.json';
$getfield = '?screen_name=YOURNAME';					// enter your twitter name without the "@" here
$requestMethod = 'GET';
$twitter = new TwitterAPIExchange($settings);
$follow_count=$twitter->setGetfield($getfield)
->buildOauth($ta_url, $requestMethod)
->performRequest();
$data = json_decode($follow_count, true);
$followers_count = $data[0]['user']['followers_count'];

?>

<?php echo $followers_count; ?>

but it returns me error like this

Fatal error: Uncaught exception 'Exception' with message 'SSL certificate problem: unable to get local issuer certificate' in C:\wamp\www\hy\TwitterAPIExchange.php on line 305