function follow($id)
{
$postfields = array('access_token' => $_SESSION['token'], 'action' => 'follow');
$url = "https://api.instagram.com/v1/users/" . $id . "/relationship";
$sig = generate_sig("/users/" . $id . "/relationship", $postfields, $secret);
$postfields["sig"] = $sig;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
$server_output = curl_exec($ch);
curl_close($ch);
return json_decode($server_output);
}
public function post_request($method, $params)
{
$params['method'] = $method;
$params['session_key'] = $this->session_key;
$params['api_key'] = $this->api_key;
$params['call_id'] = microtime(true);
if (!isset($params['v'])) {
$params['v'] = '1.0';
}
$post_params = array();
foreach ($params as $key => &$val) {
if (is_array($val)) {
$val = implode(',', $val);
}
$post_params[] = $key . '=' . urlencode($val);
}
if ($this->desktop && $method != 'facebook.auth.getSession' && $method != 'facebook.auth.createToken') {
$secret = $this->session_secret;
} else {
$secret = $this->secret;
}
$post_params[] = 'sig=' . generate_sig($params, $secret);
$post_string = implode('&', $post_params);
// Use CURL if installed
if (function_exists('curl_init')) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->server_addr);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, 'Facebook API PHP5 Client 1.0 (curl) ' . phpversion());
$result = curl_exec($ch);
curl_close($ch);
} else {
// non-curl based version...
// Using fopen with ssl transport requires OpenSSL to be installed.
if (strncmp($this->server_addr, 'https', 5) == 0 && function_exists('openssl_open')) {
$protocol = 'https';
} else {
// switch back to http
$protocol = 'http';
$this->server_addr = str_replace('https://', 'http://', $this->server_addr);
}
$context = array($protocol => array('method' => 'POST', 'header' => 'Content-type: application/x-www-form-urlencoded' . "\r\n" . 'User-Agent: Facebook API PHP5 Client 1.0 (non-curl) ' . phpversion() . "\r\n" . 'Content-length: ' . strlen($post_string), 'content' => $post_string));
$contextid = stream_context_create($context);
$sock = fopen($this->server_addr, 'r', false, $contextid);
if ($sock) {
$result = '';
while (!feof($sock)) {
$result .= fgets($sock, 4096);
}
fclose($sock);
}
}
return $result;
}