php curl常用函数

时间：2011-8-16 作者：smarteng 分类： PHP相关

php curl常用于：GET，POST，HTTP验证，302重定向，设置cURL的代理。

1、开启PHP的CURL功能

在Windows平台下，或者使用xampp之类的集成服务器的程序，会非常简单，你需要改一改你的php.ini文件的设置，找到php_curl.dll，并取消前面的分号注释就行了。如下所示：

//取消注释，开启cURL功能

extension=php_curl.dll

在Linux下面，那么，你需要重新编译你的PHP了，编辑时，你需要打开编译参数——在configure命令上加上“–with-curl” 参数。

2、使用CURL来GET数据

cURL最简单最常用的采用GET来获取网页内容的PHP函数

function getCURL($url){

$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, $url);

curl_setopt($curl, CURLOPT_HEADER, 0);

curl_setopt($curl, CURLOPT_TIMEOUT, 3);//超时时间

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$data = curl_exec($curl);

curl_close($curl);

return $data;

}

3、使用CURL来POST数据

当我们需要对cURL请求的页面采用POST的请求方式时，我们使用下面的PHP函数

function _curl_post($url, $vars) {

$ch = curl_init();

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);

$data = curl_exec($ch);

curl_close($ch);

if ($data)

return $data;

else

return false;

}

4、使用CURL，需要HTTP服务器认证

当我们请求地址需要加上身份验证，即HTTP服务器认证的时候，我们就要使用下面的函数了，对于cURL中GET方法使用验证也是采用相同的方式。

function postCurlHTTP($url, $str) {

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_USERPWD, “验证的用户名:密码”);

curl_setopt($ch, CURLOPT_POSTFIELDS, $str);

$data = curl_exec($ch);

$Headers = curl_getinfo($ch);

if ($Headers['http_code'] == 200) {

return $data;

} else {

return false;

}

5、使用CURL获取302重定向的页面

下面函数$data为重定向后页面的内容，这里我们写一个简单的cURL POST的302重定向后返回重定向页面URL的函数，有时候返回页面的URL更加重要。

function _curl_post_302($url, $vars) {

$ch = curl_init();

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // 302 redirect

curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);

$data = curl_exec($ch);

$Headers = curl_getinfo($ch);

curl_close($ch);

if ($data&&$Headers)

return s$Headers["url"];

else

return false;

}

6、给CURL加个代理服务器

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, ‘http://www.js8.in‘);

curl_setopt($ch, CURLOPT_HEADER, 1);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);

curl_setopt($ch, CURLOPT_PROXY, ‘代理服务器地址（www.js8.in）:端口’);

curl_setopt($ch, CURLOPT_PROXYUSERPWD, ‘代理用户:密码’);

$data = curl_exec();

curl_close($ch);

7、一个CURL简单的类

<?php

Sean Huber CURL library

This library is a basic implementation of CURL capabilities.

It works in most modern versions of IE and FF.

==================================== USAGE ====================================

It exports the CURL object globally, so set a callback with setCallback($func).

(Use setCallback(array(’class_name’, ‘func_name’)) to set a callback as a func

that lies within a different class)

Then use one of the CURL request methods:

get($url);

post($url, $vars); vars is a urlencoded string in query string format.

Your callback function will then be called with 1 argument, the response text.

If a callback is not defined, your request will return the response text.

class CURL {

var $callback = false;

function setCallback($func_name) {

$this->callback = $func_name;

}

function doRequest($method, $url, $vars) {

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_HEADER, 1);

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

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_COOKIEJAR, ‘cookie.txt’);

curl_setopt($ch, CURLOPT_COOKIEFILE, ‘cookie.txt’);

if ($method == ‘POST’) {

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);

}

$data = curl_exec($ch);

curl_close($ch);

if ($data) {

if ($this->callback)

{

$callback = $this->callback;

$this->callback = false;

return call_user_func($callback, $data);

} else {

return $data;

}

} else {

return curl_error($ch);

}

function get($url) {

return $this->doRequest(‘GET’, $url, ‘NULL’);

}

function post($url, $vars) {

return $this->doRequest(‘POST’, $url, $vars);

}

标签: php

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