解决方案
有时候,我们需要在WINDOWS服务器中安装多个不同版本的PHP环境,或采用不同的php.ini配置,例如在使用中国E商务网的IONCUBE系统对PHP程序进行加密后,要在php.ini中设置加载选项目，但这个选项和zend加密程序解释器不能同时存在，如果在服务器中有另外程序采用ZEND加密的话，就非常可惜。
如果能在WINDOWS服务器中装多套PHP，使用不同的PHP.INI就可以解决这样的问题。但是如果采用正规的方法要重新编译PHP，比较麻烦。我们最近已经研究成功，采用另一种方式来安装多个PHP：
首先安装一套PHP，采用默认方式，装在c:php ，安装后，php.ini一般自动复制到c:winnt下。
将winnt下的php.ini用Ctrl+c和 Ctrl+V方式复制到c:php下，这时候你可以用PHPINFO()查看php.ini的路径，已经自动变成c:/php/php.ini 了。
接着，就可以安装第二套PHP，最好换个磁盘，安装在d:php，安装时，PHP又会把php.ini拷贝在c:winnt下，只要如法炮制将其拷贝到d:php下就可以了。
然后，在IIS -> 主目录->配置中，可以为不同站点指定不同的PHP运行文件就可以了。
采用此方法安装两套PHP后，对系统资源并没有特别的影响，经测试，系统运行正常。
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