php5.3、5.4和apache都是用vc9编译，电脑必须安装vc9运行库才能运行。
php5.5、5.6是vc11编译，如用php5.5、5.6必须安装vc11运行库。
php7.0、7.1是vc14编译，如用php7.0、7.1及以上版本必须安装vc14运行库。
Visual C++ Redistributable Package是安装 Visual C++ 库的运行时组件。以上安装VC++系统运行库必须是32位的(Php5.3, 5.4 and Apache are compiled by vc9. The computer must install vc9 runtime to run.
Php5.5 and vc11 are compiled by 5.6, such as php5.5 and 5.6. Vc11 runtime must be installed.
Php7.0 and 7.1 are vc14 compilation. If php7.0, 7.1 and above are required, vc14 runtime must be installed.
Visual C++ Redistributable Package is the runtime component that installs the Visual C++ library. The above installation of the VC++ system runtime must be 32 bits)