$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, "http://www.baidu.com");

//执行后不直接打印出来

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$output = curl_exec($curl);

curl_close($curl);

echo str_replace("百度", "屌丝", $output);

        $data = 'theCityName=北京';

	$curlobj = curl_init();

	curl_setopt($curlobj, CURLOPT_URL, "http://www.webxml.com.cn/webServices/WeatherWebService.asmx/getWeatherbyCityName");

	//不返回请求头信息

	curl_setopt($curlobj, CURLOPT_HEADER, 0);

	//以文件流形式输出，不直接输出

	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, 1);

	//post方式请求

	curl_setopt($curlobj, CURLOPT_POST, 1);

	//传递一个作为http ‘post’操作的所有数据的字符串

	curl_setopt($curlobj, CURLOPT_POSTFIELDS, $data);

	//这句不写会报错（请求中包含user-agent头的字符串）--未将对象引用设置到对象的实例

	curl_setopt($curlobj,CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

	curl_setopt($curlobj, CURLOPT_HTTPHEADER, array("application/x-www-form-urlencode;charset=utf-8","Content-length:".strlen($data)));

	$rtn = curl_exec($curlobj);

	if(!curl_errno($curlobj)){

		//$info = curl_getinfo($curlobj);

		//print_r($info);

		echo $rtn;

	}else{

		echo 'Curl error'.curl_error($curlobj);

	}

	curl_close($curlobj);

        $curlobj = curl_init();

	$localfile = 'ftp01.php';

	$fp = fopen($localfile, 'r');

	curl_setopt($curlobj, CURLOPT_URL, "ftp://192.168.1.100/ftp01_uploaded_01.php");

	curl_setopt($curlobj, CURLOPT_HEADER, 0);

	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, 1);

	//最大延迟多少秒

	curl_setopt($curlobj, CURLOPT_TIMEOUT, 300);

	curl_setopt($curlobj, CURLOPT_USERPWD, "peter.zhou:123456");

	//让PHP为上传做准备

	curl_setopt($curlobj, CURLOPT_UPLOAD, 1);

	//输出文件

	curl_setopt($curlobj, CURLOPT_INFILE, filesize($localfile));

	$rtn = curl_exec($curlobj);

	fclose($fp);

	if(!curl_errno($curlobj)){

		echo "uploaded successfully";

	}else{

		echo 'curl  error:' . curl_error($curlobj);

	}

        $curlobj = curl_init();

	curl_setopt($curlobj, CURLOPT_URL, "ftp://192.168.1.100/downloaddemo.txt");

	curl_setopt($curlobj, CURLOPT_HEADER, 0);

	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, 1);

	curl_setopt($curlobj, CURLOPT_TIMEOUT, 300);

	curl_setopt($curlobj, CURLOPT_USERPWD, "peter.zhou:123456");//FTP用户名：密码

	$outfile = fopen('test.txt', 'wb');//保存到本地的文件名

	//输出文件

	curl_setopt($curlobj, CURLOPT_FILE, $outfile);

	$rtn = curl_exec($curlobj);

	curl_close($curlobj);

	if(!curl_errno($curlobj)){

		//$info = curl_getinfo($curlobj);

		//print_r($info);

		echo $rtn;

	}else{

		echo 'Curl error'.curl_error($curlobj);

	}

        $curlobj = curl_init();

	curl_setopt($curlobj, CURLOPT_URL, "https://ajax.aspnetcdn.com/ajax/jquery.validate/1.12.0/jquery.validate.js");

	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, true);

	//设置HTTPS支持

	date_default_timezone_set('PRC');

	curl_setopt($curlobj,CURLOPT_SSL_VERIFYPEER,0);

	$output = curl_exec($curlobj);

	curl_close($curlobj);

	echo $output;

        $data = 'username=demo_peter@126.com&password=123&remember=1'

	$curlobj = curl_init();

	curl_setopt($curlobj,CURLOPT_URL,"http://www.imooc.com/user/login");//设置访问网页的URL

	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, true);//执行之后不直接打印出来

	//Cookie相关设置，这部分设置需要在所有会话之前设置

	date_default_timezone_set("PRC");

	curl_setopt($curlobj, CURLOPT_COOKIESESSION, true);

	curl_setopt($curlobj, CURLOPT_COOKIEFILE, "cookiefile");

	curl_setopt($curlobj, CURLOPT_COOKIEJAR,"cookiefile");

	curl_setopt($curlobj, CURLOPT_COOKIE, session_name() . '=' . session_id());

	curl_setopt($curlobj, CURLOPT_HEADER, 0);

	curl_setopt($curlobj, CURLOPT_FOLLOWLOCATION, 1);

	curl_setopt($curlobj, CURLOPT_POST, 1);

	curl_setopt($curlobj, CURLOPT_POSTFIELDS, $data);

	curl_setopt($curlobj, CURLOPT_HTTPHEADER, array("application/x-www-form-urlencode;charset=utf-8","Content-length:".strlen($data)));

	curl_exec($curlobj);

	curl_setopt($curlobj, CURLOPT_POST, "http://www.imooc.com/sapce/index");

	curl_setopt($curlobj, CURLOPT_POST, 0);

	curl_setopt($curlobj, CURLOPT_HTTPHEADER, 0);

	curl_setopt($curlobj, CURLOPT_HTTPHEADER, array("Content-type:text/xml"))

	curl_close($curlobj);

	echo $output;