在cmd上无法识别php

Question

当我在CMD寡妇上运行此命令时，我收到此错误，我编辑了环境变量 到TEMP

%USERPROFILE%\AppData\Local\Temp;C:\xampp\php

和TMP TO

%USERPROFILE%\AppData\Local\Temp;C:\xampp\php

但我仍然得到同样的错误

'php' is not recognized as an internal or external command,
operable program or batch file.