PHP4用户手册:函数-CURL
XI. CURL, 客户 URL 库函数
PHP 支持libcurl(允许你用不同的协议连接和沟通不同的服务器)。, libcurl当前支持http, https, ftp, gopher, telnet, dict, file, 和ldap 协议。libcurl同样支持HTTPS证书授权,HTTP POST, HTTP PUT, FTP 上传(当然你也可以使用PHP的ftp扩展), HTTP基本表单上传,代理,cookies,和用户认证。
为了使用CURL函数你需要安装CURL包。PHP 需要你使用CURL 7.0.2-beta或更高版。如果CURL的版本低于7.0.2-beta,PHP将不工作。
要使用PHP的CURL支持,你必须用带有--with-curl[=DIR]参数重新编译PHP(DIR是包含库和头文件的目录)。
这些函数是在PHP 4.0.2中新增得。
一旦你编译了带有CURL支持的PHP,你可以使用curl函数。基本思路是:你使用网站建设服务器脚本类\PHPPHP用户手册fancyfunction.curl-init.html>curl_init()函数初始化CURL会话,而后你可以设置你的所有选项,通过curl_exec()函数执行,最后你可以作用curl_close()函数来结束你的会话。以下是一个例子:是把PHP的主页取回放到一个文件中。
例 1. 使用PHP的CURL模块取回PHP主页目录列表 curl_init — 初始化一个CURL会话 curl_setopt — 为CURL调用设置一个选项 curl_exec — 执行一个CURL会话 curl_close — 关闭一个CURL会话 curl_version — 返回当前CURL版本

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