最初学习的例子
<?php
// 创建一个cURL资源
$ch = curl_init();

// 设置URL和相应的选项     好像必须要用 www.baidu.com 不要用 baidu.com 否则会跳转
//是由于它本身 网站跳转的吧
curl_setopt($ch, CURLOPT_URL, "http://www.baidu.com/");
curl_setopt($ch, CURLOPT_HEADER, false);
var_dump("QQQQQ");
// 抓取URL并把它传递给浏览器
curl_exec($ch);
var_dump("QQQQQ");
// 关闭cURL资源，并且释放系统资源
curl_close($ch);
?>
 

下面是史平忠做的王者大陆的例子

<?php

//$rurl = $_GET["url"];   
$rurl = 'http://passport.aaaa.com/Service/regService.aspx' ;                                   //需要转到的b.domain.com中的页面
$_GET = array_merge($_GET, $_POST);     //处理CGI参数和值
$_GET = array_merge($_POST, $_GET);
//$GET = $_POST;
$qs = "";
$needStrip = get_magic_quotes_gpc();
foreach ($_GET as $k=>$v) {
    if ($needStrip) $v = stripslashes($v);
    $qs .= "$k=$v&";
}                                                                  
$ch = curl_init();

$cookie = "";                                                  //处理COOKIE
foreach ($_COOKIE as $key=>$value){
    $cookie .= "$key=$value; ";
}
//var_dump($qs);
if ($_SERVER["REQUEST_METHOD"] === "POST") { //POST方法
    $options = array(
    CURLOPT_URL=>$rurl,
    CURLOPT_POST=>true,
    CURLOPT_POSTFIELDS=>$qs,
    CURLOPT_COOKIE=>$cookie,
    );
} else {                                                                         //GET方法
    $options = array(
    CURLOPT_URL=>$rurl."?".$qs,
    CURLOPT_COOKIE=>$cookie,
    );
}
curl_setopt_array($ch, $options);
curl_exec($ch);// 抓取URL并把它传递给浏览器
curl_close($ch);

下面是从网上来的例子

(下面是get方法)

$ch = curl_init("http://www.jb51.net/") ; 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true) ; 
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true) ; 
$output = curl_exec($ch) ; 
$fh = fopen("out.html", 'w') ; 
fwrite($fh, $output) ; 
fclose($fh) ;

 (下面是post方法)(它这里对参数值进行了url编码)

//extract data from the post 
extract($_POST) ; 
//set POST variables 
$url = 'http://www.jb51.net/get-post.php' ; 
$fields = array( 
'lname'=>urlencode($last_name) , 
'fname'=>urlencode($first_name) , 
'title'=>urlencode($title) , 
'company'=>urlencode($institution) , 
'age'=>urlencode($age) , 
'email'=>urlencode($email) , 
'phone'=>urlencode($phone) 
); 
//url-ify the data for the POST 
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&' ; } 
rtrim($fields_string ,'&') ; 
//open connection 
$ch = curl_init() ; 
//set the url, number of POST vars, POST data 
curl_setopt($ch, CURLOPT_URL,$url) ; 
curl_setopt($ch, CURLOPT_POST,count($fields)) ; 
curl_setopt($ch, CURLOPT_POSTFIELDS,$fields_string) ; 
//execute post 
$result = curl_exec($ch) ; 
//close connection 
curl_close($ch)

来自  http://www.jb51.net/article/15554.htm

 

<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://www.163.com/");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
?>

当执行curl_exec($ch);后会即刻输出返回内容。

不让它输出而得到它返回的内容的方法。

1. $c = curl_init();  

2. curl_setopt($c, CURLOPT_URL, $url);  

3. //Tell curl to write the response to a variable   不让它输出而得到它返回的内容的方法。

4. curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);  

5. // The maximum number of seconds to allow cURL functions to execute.  

6. curl_setopt($c, CURLOPT_CONNECTTIMEOUT, 60);  

7.       

8. $buf = curl_exec($c);  

 将内容赋值给变量

来自 http://bbs.phpchina.com/home.php?mod=space&uid=884691&do=blog&id=193255