Curl initialize func

curl_helper.php

<?php

public function get_curl_instance($url, $headers, $fields = null, $is_post = false) {
  $curl = curl_init($url);
  curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );
  curl_setopt( $curl, CURLOPT_HEADER, true );
  curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, false );
  curl_setopt( $curl, CURLOPT_HTTPHEADER, $headers );
  if ( $fields )
    curl_setopt( $curl, CURL_POSTFIELDS, $fields );
  if ( $is_post )
    curl_setopt( $curl, CURLOPT_POST, true );

  return $curl;
}