实例 | 7个简单的curl实例

1. 抓取百度

$curl = curl_init("http://www.baidu.com");
curl_exec($curl);
curl_close($curl);

2. 抓取百度并替换

$curl = curl_init();
curl_setopt($curl,CURLOPT_URL, "http://www.baidu.com");//设置url
curl_setopt($curl,CURLOPT_RETURNTRANSFER, true);//执行后不直接打印
$output = curl_exec($curl);//执行
curl_close($curl);//关闭
echo str_replace("百度", "王明昌博客", $output);

3.调用webserver获取天气信息

$data = 'theCityName=上海';
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/getWeatherbyCityName");
curl_setopt($curl, CURLOPT_HEADER, 0);//
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//执行时不直接打印
curl_setopt($curl, CURLOPT_POST, 1);//post传参
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);//post传的值
curl_setopt( $curl,CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);// 不加会报错=====>未将对象引用设置到对象的实例。
curl_setopt($curl, CURLOPT_HTTPHEADER, array("application/x-www-form-urlencoded;charset=utf-8","Content-length:". strlen($data)
));
$rtn = curl_exec($curl);
if(!curl_errno($curl)){
echo $rtn;
}else{
echo "curl error:".curl_error($curl);
}

4. 带session的爬虫

$data = 'email=176*****&password=222222&rember=1';
$curl = curl_init();//初始化
curl_setopt($curl, CURLOPT_URL, "http://www.imooc.com/user/newlogin");//设置url
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);//执行不直接打印
date_default_timezone_set("PRC");//使用cookie设置时区
curl_setopt($curl, CURLOPT_COOKIESESSION, true);
curl_setopt($curl,CURLOPT_COOKIEFILE,"cookiefile");
curl_setopt($curl,CURLOPT_COOKIEJAR,"cookiefile");
curl_setopt($curl,CURLOPT_COOKIE, session_name().'='.session_id());
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);//让curl支持页面的跳转

curl_setopt($curl, CURLOPT_POST, 1);//post传参
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("application/x-www-form-urlencoded;charset=utf-8",
"Content-length:". strlen($data)
));
curl_exec($curl);//执行
curl_setopt($curl, CURLOPT_URL, "http://www.imooc.com/user/setbindsns");
curl_setopt($curl, CURLOPT_POST, 0);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-type:text/xml"));
$output = curl_exec($curl);
curl_close($curl);//关闭
echo $output;

5.下载网络上一个https的资源

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

date_default_timezone_set("PRC");
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);

$output = curl_exec($curl);
curl_close($curl);
echo $output;

6. ftp下载到本地

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "ftp://119.1.1.1/1.txt");
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 300);
curl_setopt($curl, CURLOPT_USERPWD, "pater.zzz:123456");
$outfile = fopen('desc.txt', 'wb');//保存的本地文件名
curl_setopt($curl, CURLOPT_FILE, $outfile);

$rtn = curl_exec($curl);
fclose($outfile);
if(!curl_error($curl)){
echo $rtn;
}else{
echo "error".curl_error($curl);
}
curl_close($curl);

7. 本地上传到ftp

$curl = curl_init();
$localfile = '1.php';
$fp = fopen($localfile, 'r');

curl_setopt($curl, CURLOPT_URL, 'ftp://119.1.1.1/1.txt');
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 300);
curl_setopt($curl, CURLOPT_USERPWD, "pater.zzz:123456");

curl_setopt($curl, CURLOPT_UPLOAD, 1);
curl_setopt($curl, CURLOPT_INFILE, $fp);
curl_setopt($curl, CURLOPT_INFILESIZE, filesize($localfile));
$rtn = curl_exec($curl);
fclose($fp);
if(!curl_errno($curl)){
echo "success";
}else{
echo "error:".curl_error($curl);
}
curl_close($curl);