How to make a web based appliaction to call on cell phone

I want to make a web page in PHP from there users can easily call to any mobile numbers how is this possible in PHP开发者_开发百科?

I think you're looking for something similar to Google Talk Developer API with the libjingle kit.

(Considering that's about as close to voice and calls you'll get to without finding a company with a phone number and SDK--Google voice I don't think has an SDK).

Additionally, you could Google "VOIP SDK" and see what you get.

If you don't need synchronous voice communication (i.e.: a pre-recorded message is fine) then Twilio has a wonderful HTTP API for interfacing with telephones.