PHP使用CURL发起请求

curl.php

    <?php
    
    /**
     * 发起一个自定义请求
     * @param string $url
     * @param string $method
     * @param array $options
     * @param array $headers
     * @param array $vars
     * @return HttpResponse|string
     */
    public static function send($url,$method = 'get' ,$headers = array(),$vars = array(),$options = array())
    {
        $request = curl_init();

        if (is_array($vars)) $vars = http_build_query($vars, '', '&');
        //http://www.php.net/manual/zh/function.curl-setopt.php
        switch (strtoupper($method)) {
            case 'HEAD':
                curl_setopt($request, CURLOPT_NOBODY, true);
                break;
            case 'GET':
                curl_setopt($request, CURLOPT_HTTPGET, true);
                break;
            case 'POST':
                curl_setopt($request, CURLOPT_POST, true);
                break;
            default:
                curl_setopt($request, CURLOPT_CUSTOMREQUEST, $method);
        }

        curl_setopt($request, CURLOPT_URL, $url);

        if (!empty($vars)) {
            curl_setopt($request, CURLOPT_POSTFIELDS, $vars);
        }

        # Set some default CURL options
        curl_setopt($request, CURLOPT_HEADER, true);
        curl_setopt($request, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($request, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($request, CURLOPT_SSL_VERIFYHOST, false);

        curl_setopt($request, CURLOPT_AUTOREFERER, true);

        if(is_array($options) && empty($options) === false) {
            # Set any custom CURL options
            foreach ($options as $name => $value) {
                curl_setopt($request, $name, $value);
            }
        }

        if(is_array($headers) &&  empty($headers) === false) {

            if (isset($headers['User-Agent'])) {
                curl_setopt($request, CURLOPT_USERAGENT, $headers['User-Agent']);
            }
            if (isset($headers['Cookie'])) {
                curl_setopt($request, CURLOPT_COOKIEFILE, $headers['Cookie']);
            }
            if (isset($headers['Referer'])) {
                curl_setopt($request, CURLOPT_REFERER, $headers['Referer']);
            }
            if(isset($headers['Accept-Encoding'])){
                curl_setopt($request,CURLOPT_ENCODING,$headers['Accept-Encoding']);
            }

            $header = array();

            foreach ($headers as $key => $value) {
                $header[] = $key . ': ' . $value;
            }
            curl_setopt($request, CURLOPT_HTTPHEADER, $header);
        }

        $response = curl_exec($request);

        if($response){
            $response = new HttpResponse($response);
            curl_close($request);
            return $response;
        }else {
            $error = curl_errno($request).' - '.curl_error($request);
            return $error;
        }
    }