Salesforce | How to access php code in salesforce apex class

We can access the php code in salesforce using @future(callout=true/false). The function we make for accessing the php code in apex class is of static type and does not return any value.

Syntax:

@future(callout=true)
public static void function_Name()
{
  //variable declaration
     try
     {
          Http h = new Http();
          HttpRequest req = new HttpRequest();
          HttpResponse res = new HttpResponse();
          req.setTimeout(60000);
          String url =”//Path for the php code”;
          req.setEndPoint(url);
          req.setMethod('GET');
          res = h.send(req);
          String response  = res.getBody();
    }
    catch(exception e)
    {
       system.debug('Save file to server exception :'+e);
    }
}