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

Question

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

Why does that error occur even though I've added PHP to my environment variables?

My environment variable PATH is shown below:

C:\Program Files\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files\PC ............... Files\QTSystem\;A:\xampp\php\php.exe

I'm using Windows 7.

Answer 1

A:\xampp\php\php.exe 

The PATH environment variable must contain paths only, not file names.

Make that

A:\xampp\php