在linux中使用phpize安装php扩展模块
linux系统中，php安装成功后，在bin目录下会生成一个名叫phpize的可执行脚本，这个脚本的用途是动态安装php扩展模块。
使用phpize脚本安装php扩展模块的好处：在安装php时没有安装的扩展，可以在以后随时安装上，且不需要重新安装PHP。
安装步骤：
1、切换到扩展模块目录
在php源码包被解压后的目录中有个ext子目录，这里有近70多个主流的php扩展模块安装包。如现在要安装imap扩展，则切换到imap目录：
cd /software/php-5.5.3/ext/imap
2、在imap目录中执行phpize脚本
/usr/local/php/bin/phpize执行成功会返回几行数据：
Configuring for:
PHP Api Version: 20041225
Zend Module Api No: 20060613
Zend Extension Api No: 220060519
3、开始编译(注意--with-php-config参数)
若编译过程中报错,可以参考另外一篇文章解决报错 http://blog.csdn.net/haiqiao_2010/article/details/46005773./configure --with-php-config=/usr/local/php/bin/php-config --with-kerberos --with-imap-ssl
4、make
5、make install
系统提示信息截图如下: 这时在/usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/
目录会生成imap.so文件
6、在php.ini中找到extension_dir字段，
把值修改成：/usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/
7、再在php.ini的Dynamic Extensions节位置下添加
extension = "imap.so"8、重启服务器
PHP 、NGINX 、APACHE，完成。 phpinfo() 看到如下模块扩展,即说明安装成功.
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