my curl method

curlfunction.php

public function runCurl($url, $post = null, $headers = null, $delete = null){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, $post == null ? 0 : 1);
        if($post != null) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        }
        if($delete != null) {
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "$delete");
        }
        curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        if($headers != null) {
            curl_setopt($ch, CURLOPT_HEADER, true);
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        }
        $response = curl_exec($ch);
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        if($http_code >= 400) {
            return $response;
        }
        return $response;

    }