title: redirect to an external url but send custom POST parameters
body: <p>i am trying to make a script that redirects to a site, for example paypal or coinbase, however these require post parameters, most of the time i send those with a form, however i am looking for a method that allows me to send post parameters directly from the controller and redirect the user to the external site.</p>
  
  <p>I am running symfony2, and i don't wanna use forms, i have been trying to find such example online but i can't find any.</p>
  
  <p>If any code is required, please don't hesitate to ask but right now i don't have a clue on how to do such.</p>
  
  <p>I am new to REST apis and it's giving me quite a bit of troubles. </p>