title: Can I get a property of an object through php POST?
body: <p>I have a form in a php page with a lot of text inputs in it, with a presetted value each.
  When someone submit the page by POST, I would like to know which of them have been changed, so I thought I could set a property of the text (like background colour) when someone type in the text input.</p>
  
  <p>After the submit, how can I get the properties of inputs to see if they have been changed? $_POST['name_of_text_input'] return only the value of the input?</p>