Curl学习笔记

简介

PHP supports libcurl, a library created by Daniel Stenberg, that allows you to connect and communicate to many different types of servers with many different types of protocols. libcurl currently supports the http, https, ftp, gopher, telnet, dict, file, and ldap protocols. libcurl also supports HTTPS certificates, HTTP POST, HTTP PUT, FTP uploading (this can also be done with PHP's ftp extension), HTTP form based upload, proxies, cookies, and user+password authentication.

These functions have been added in PHP 4.0.2.

需求

In order to use the CURL functions you need to install the CURL package. PHP requires that you use CURL 7.0.2-beta or higher. In PHP 4.2.3, you will need CURL version 7.9.0 or higher. From PHP 4.3.0, you will need a CURL version that's 7.9.8 or higher. PHP 5.0.0 requires a CURL version 7.10.5 or greater.

安装

To use PHP's CURL support you must also compile PHP --with-curl[=DIR] where DIR is the location of the directory containing the lib and include directories. In the "include" directory there should be a folder named "curl" which should contain the easy.h and curl.h files. There should be a file named libcurl.a located in the "lib" directory. Beginning with PHP 4.3.0 you can configure PHP to use CURL for URL streams --with-curlwrappers.

Note to Win32 Users: In order to enable this module on a Windows environment, you must copy libeay32.dll and ssleay32.dll from the DLL folder of the PHP/Win32 binary package to the SYSTEM folder of your Windows machine. (Ex: C:\WINNT\SYSTEM32 or C:\WINDOWS\SYSTEM)

参考网站
牋 http://cn2.php.net/manual/zh/ref.curl.php
1.使用POST

<?php // // A very simple PHP example that sends a HTTP POST to a remote site // $url = 'http://localhost/test.php'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL,$url); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS,牋牋牋牋牋牋燶\n"postvar1=value1&postvar2=value2&postvar3=value3"); curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1); $result = curl_exec ($ch); curl_close ($ch); ?>

2.使用COOKIE

<?php /* This script is an example of using curl in php to log into on one page and then get another page passing all cookies from the first page along with you. If this script was a bit more advanced it might trick the server into thinking its netscape and even pass a fake referer, yo look like it surfed from a local page. */ $ch = curl_init(); curl_setopt($ch, CURLOPT_COOKIEJAR, "/tmp/cookieFileName"); curl_setopt($ch, CURLOPT_URL,"http://localhost/test.php"); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, "name=name&password=password"); curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); ob_start(); // prevent any output $data = curl_exec ($ch); // execute the curl command ob_end_clean(); // stop preventing output curl_close ($ch); unset($ch); $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); curl_setopt($ch, CURLOPT_COOKIEFILE, "/tmp/cookieFileName"); curl_setopt($ch, CURLOPT_URL,"http://localhost/cookie.php"); $buf2 = curl_exec ($ch); curl_close ($ch); echo "<PRE>".htmlentities($buf2); ?>

3.文件上传

<?php

//

// HTTP PUT to a remote site

// Author: Julian Bond

//



$url = "http://some.server.com/put_script";

$localfile = "localfile.csv";



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

$ch = curl_init();

curl_setopt($ch, CURLOPT_VERBOSE, 1);

curl_setopt($ch, CURLOPT_USERPWD, 'user:password');

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_PUT, 1);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_INFILE, $fp);

curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));



$http_result = curl_exec($ch);

$error = curl_error($ch);

$http_code = curl_getinfo($ch ,CURLINFO_HTTP_CODE);



curl_close($ch);

fclose($fp);



print $http_code;

print "<br /><br />$http_result";

if ($error) {

   print "<br /><br />$error";

}



?>