如果我们安装了php环境但在测试用curl_init()时提示Fatal error: Call to undefined function: curl_init()，这个是证明我们curl没有配置好，下面我来介绍介绍。
调用curl_init()函数测试，出现错误提示如下：
Fatal error: Call to undefined function: curl_init()
windowsxp 2003
首先保证你的php已经可以使用，本文不讲解windows下的php配置，只是增加curl的扩展。
1、拷贝PHP目录中的libeay32.dll 和 ssleay32.dll 两个文件到 c:/windows/system32 目录。
2、修改php.ini。去掉 extension = php_curl.dll 前面的分号。
3、重启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:
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extension_dir = C:phpextensions |
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■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
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// change the following line from ... // ... to |
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