where is download esp8266wifi.h ? about esp8266ping HOT 5 CLOSED

Hi!
Your question is not clear, but if you want to download the library, use this link:
https://github.com/dancol90/ESP8266Ping/archive/master.zip

from esp8266ping.

Thank You,In your code ESP8266Ping.h

extern "C" {
#include <ping.h>
}
can you send me this file ,my email [email protected]

from esp8266ping.

That header file is part of the Espressif SDK and it is included in the ESP8266 Arduino core (https://github.com/esp8266/Arduino).
There's no need to download it elsewhere.
If your compiler doesn't find it, you're using this library wrong or your Arduino installation is not working as it should.

from esp8266ping.

Thank you ,I see , My compiler is arduino-1.8.1-windows

from esp8266ping.

i want esp8266wifi.h library

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