<?php
/**
 * 
 * @brief http請(qǐng)求類(lèi)
 *
 **/
class Activity_Http
{
    /**
     * Contains the last HTTP status code returned.
     */
    public $http_code;
    /**
     * Contains the last API call.
     */
    public $url;
    /**
     * Set up the API root URL.
     */
    public $host;
    /**
     * Set timeout default.
     */
    public $timeout = 10;
    /**
     * Set connect timeout.
     */
    public $connecttimeout = 10;
    /**
     * Respons format.
     */
    public $format = &#39;unknow&#39;;
    /**
     * Decode returned json data.
     */
    public $decode_json = TRUE;
    /**
     * Contains the last HTTP headers returned.
     */
    public $http_info;
    /**
     * print the debug info
     */
    public $debug = FALSE;
    /**
     * Verify SSL Cert.
     */
    public $ssl_verifypeer = FALSE;
    /**
     * Set the useragnet.
     */
    public $useragent = &#39;xxx&#39;;

    /**
     * 模擬Referer
     * @var url
     */
    public $referer;

    public $follow;

    /**
     * boundary of multipart
     * @ignore
     */
    public static $boundary = &#39;&#39;;

    public function __construct($host = &#39;&#39;)
    {
        $this->host = $host;
    }

    /**
     * GET wrappwer for request.
     *
     * @return mixed
     */
    function get($url, $parameters = array(), $headers = array(),$cookie = array()) {
        $response = $this->request($url, 'GET', $parameters, NULL, $headers,$cookie);
        if ($this->format === 'json' && $this->decode_json) {
            return json_decode($response, true);
        }
        return $response;
    }

    /**
     * POST wreapper for request.
     *
     * @return mixed
     */
    function post($url, $parameters = array(), $multi = false, $headers = array(),$cookie = array()) {
        $response = $this->request($url, 'POST', $parameters, $multi, $headers,$cookie );
        if ($this->format === 'json' && $this->decode_json) {
            return json_decode($response, true);
        }
        return $response;
    }

    /**
     * DELTE wrapper for oAuthReqeust.
     *
     * @return mixed
     */
    function delete($url, $parameters = array()) {
        $response = $this->request($url, 'DELETE', $parameters);
        if ($this->format === 'json' && $this->decode_json) {
            return json_decode($response, true);
        }
        return $response;
    }

    /**
     * Format and sign an OAuth / API request
     *
     * @return string
     * @ignore
     */
    function request($url, $method, $parameters, $multi = false, $headers = array(),$cookie = array()) {

        if (strrpos($url, 'http://') !== 0 && strrpos($url, 'https://') !== 0) {
            $url = "{$this->host}{$url}";
        }

        switch ($method) {
            case 'GET':
                $url .= strpos($url, '?') === false ? '?' : '';
                $url .= http_build_query($parameters);
                return $this->http($url, 'GET', null, $headers, $cookie);
            default:
                //$headers = array();
                $body = $parameters;
                if($multi)
                {
                    $body = self::build_http_query_multi($parameters);
                    $headers[] = "Content-Type: multipart/form-data; boundary=" . self::$boundary;
                }
                elseif(is_array($parameters) || is_object($parameters))
                {
					if(in_array('Content-Type: application/json',$headers) || in_array('Content-Type:application/json',$headers))
					{
						$body = json_encode($parameters);
					}
					else
					{
						$body = http_build_query($parameters);
					}
					
                }

                return $this->http($url, $method, $body, $headers, $cookie);
        }
    }

    /**
     * Make an HTTP request
     *
     * @return string API results
     * @ignore
     */
    function http($url, $method, $postfields = NULL, $headers = array() ,$cookie = array()) {
        $this->http_info = array();
        $ci = curl_init();
        /* Curl settings */
        curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
        curl_setopt($ci, CURLOPT_USERAGENT, $this->useragent);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, $this->connecttimeout);
        curl_setopt($ci, CURLOPT_TIMEOUT, $this->timeout);
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ci, CURLOPT_ENCODING, "");
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, $this->ssl_verifypeer);
        curl_setopt($ci, CURLOPT_HEADERFUNCTION, array($this, 'getHeader'));
        curl_setopt($ci, CURLOPT_HEADER, FALSE);

        switch ($method) {
            case 'POST':
                curl_setopt($ci, CURLOPT_POST, TRUE);
                if (!empty($postfields)) {
                    curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
                    $this->postdata = $postfields;
                }
                break;
            case 'DELETE':
                curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE');
                if (!empty($postfields)) {
                    $url = "{$url}?{$postfields}";
                }
        }

        $headers[] = "API-RemoteIP: " . $_SERVER['REMOTE_ADDR'];
        curl_setopt($ci, CURLOPT_URL, $url );
        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers );
        curl_setopt($ci, CURLINFO_HEADER_OUT, TRUE );
        if($this->referer)
        {
            curl_setopt($ci, CURLOPT_REFERER, $this->referer);
        }
        if ($this->follow)
        {
            curl_setopt($ci, CURLOPT_FOLLOWLOCATION, 1);
        }
        
        if(!empty($cookie))
        {
        	$str = "";
        	foreach ($cookie as $key=>$value)
        	{
        		$str.="{$key}={$value};";
        	}
        	
        	$str = trim($str,';');
        	curl_setopt($ci, CURLOPT_COOKIE, $str);
        }

        $response = curl_exec($ci);
        $this->http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
        $this->http_info = array_merge($this->http_info, curl_getinfo($ci));
        
        if ($this->http_code != 200)
        {
        	throw new Exception(json_encode($this->http_info), $this->http_code);
        }
        
        
        $this->url = $url;

        curl_close ($ci);
        return $response;
    }

    /**
     * Get the header info to store.
     *
     * @return int
     * @ignore
     */
    function getHeader($ch, $header) {
        $i = strpos($header, ':');
        if (!empty($i)) {
            $key = str_replace('-', '_', strtolower(substr($header, 0, $i)));
            $value = trim(substr($header, $i + 2));
            $this->http_header[$key] = $value;
        }
        return strlen($header);
    }

    /**
     * 處理多媒體數(shù)據(jù)內(nèi)容
     * @ignore
     */
    public static function build_http_query_multi($params) {
        if (!$params) return '';

        uksort($params, 'strcmp');

        $pairs = array();

        self::$boundary = $boundary = uniqid('------------------');
        $MPboundary = '--'.$boundary;
        $endMPboundary = $MPboundary. '--';
        $multipartbody = '';

        foreach ($params as $parameter => $value) {

            if( in_array($parameter, array('pic', 'image','Filedata')) && $value{0} == '@' ) {
                $url = ltrim( $value, '@' );
                $content = file_get_contents( $url );
                $array = explode( '?', basename( $url ) );
                $filename = $array[0];

                $multipartbody .= $MPboundary . "\r\n";
                $multipartbody .= 'Content-Disposition: form-data; name="' . $parameter . '"; filename="' . $filename . '"'. "\r\n";
                $multipartbody .= "Content-Type: image/unknown\r\n\r\n";
                $multipartbody .= $content. "\r\n";
            } else {
                $multipartbody .= $MPboundary . "\r\n";
                $multipartbody .= 'content-disposition: form-data; name="' . $parameter . "\"\r\n\r\n";
                $multipartbody .= $value."\r\n";
            }

        }

        $multipartbody .= $endMPboundary;
        return $multipartbody;
    }
    
    
 	/**
     * 批量請(qǐng)求urlget
     * Enter description here ...
     * @param unknown_type $urls
     * @return array
     */
    public function batch_get($url_arr)
    {
	    $mh = curl_multi_init();
		foreach ($url_arr as $i => $url) 
		{
		     $conn[$i]=curl_init($url);
		     curl_setopt($conn[$i],CURLOPT_RETURNTRANSFER,1);//設(shè)置返回do.php頁(yè)面輸出內(nèi)容
		     curl_multi_add_handle ($mh,$conn[$i]);//添加線程
		}
		
		
		do 
		{
		     $mrc = curl_multi_exec($mh,$active);
		} 
		while ($mrc == CURLM_CALL_MULTI_PERFORM);
		while ($active and $mrc == CURLM_OK) 
		{
	         if (curl_multi_select($mh) != -1) {
		         do 
		         {
		         	$mrc = curl_multi_exec($mh, $active);
		         }
		         while($mrc == CURLM_CALL_MULTI_PERFORM);
	         }
		}
		
		foreach ($url_arr as $i => $url) 
		{
			$res[$i]=curl_multi_getcontent($conn[$i]);//得到頁(yè)面輸入內(nèi)容
			curl_close($conn[$i]);
		}
		return $res;
    }
    
}

The above introduces the php http request curl method, including curl and http aspects. I hope it will be helpful to friends who are interested in PHP tutorials.