如果我們安裝了php環境但在測試用curl_init()時提示Fatal error: Call to undefined function: curl_init()，這個是證明我們curl沒有配置好，下面我來介紹介紹。
調用curl_init()函數測試，出現錯誤提示如下：
Fatal error: Call to undefined function: curl_init()
windowsxp 2003
首先保證你的php已經可以使用，本文不講解windows下的php配置，只是增加curl的擴展。
1、拷貝PHP目錄中的libeay32.dll 和 ssleay32.dll 兩個文件到 c:/windows/system32 目錄。
2、修改php.ini。去掉 extension = php_curl.dll 前面的分號。
3、重啟apache
完成！
windows 7/8/vasta
■You will need to change the extension_dir setting to point to the directory where your extensions lives, or where you have placed your php_*.dll files. For example:
代碼如下 復制代碼extension_dir = C:phpextensions
■Enable the extension(s) in php.ini you want to use by uncommenting the extension=php_*.dll lines in php.ini. This is done by deleting the leading ; from the extension you want to load.
Example #1 Enable Bzip2 extension for PHP-Windows
代碼如下 復制代碼// change the following line from ...
;extension=php_bz2.dll
// ... to
extension=php_bz2.dll
