title: Dynamic select box to populate a textfield using AJAX or jQuery and PHP
body: <p>Is there any tutorial or code that help to poulate a textfield from a chosen value from a select box usuig AJAX or jQuery and PHP? Like in the picture ...</p>
  
  <p><img src="https://i.stack.imgur.com/1pU7Z.png" alt="enter image description here"></p>