title: send HTTPREQUEST from a website to a arduino
body: <p>I want to send a value from my website to my arduino using httprequest.</p>
  
  <p><a href="https://i.stack.imgur.com/36dnX.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/36dnX.jpg" alt="EXPLANATION"></a></p>
  
  <p>as the image explain, i want to enter my site from a device (let's say mobile phone) and send a request to my arduino from my website (webserver)</p>
  
  <p>so i'm having this problems:</p>
  
  <p>1- how to address the arduino without dns, should i have a fixed ip address for my arduino, is there any way else ?</p>
  
  <p>2- what is the PHP code that i need to let the website send the request ??</p>
  
  <p>i know i can connect arduino to web using httpclient, but i want the reverse process, that is connect the website to arduino ( the website as client and a arduino as a server)</p>
  
  <p>is there anyway to do that ?</p>
  
  <p>thank you and sorry for my bad english</p>