public function execute($url, $postString = '', array $headers = [])
    {
        return $this
            ->init($url, $postString, $headers)
            ->callCurl();
    }
public function execute($url, $postString = '', array $headers = [])
    {
        return $this
            ->init($url, $postString, $headers)
            ->callCurl();
    }
public function execute ( $ url , $ postString = '' , array $ headers = [ ] ) { return $ this -> init ( $ url , $ postString , $ headers ) -> callCurl ( ) ; }
Executes curl request.

@param string $url
@param string $postString
@param array $headers
@return string
Executes curl request .