title: HTML - How to prevent user from editing form's value?
body: <p>I am developing a simple web apps that allowed user to key in information using a form when I discovered I could edit that form's input default value using Chrome -> Check Element and submit the page with a different <code>hacked</code> value. </p>
  
  <p>Code:</p>
  
  <pre><code>&lt;input id="radioOk_100237" name="radio_100237" type="radio" checked="" value="0"&gt; 
  </code></pre>
  
  <p>As normal, I load the page then using Google Chrome Check Element, I targeted this checkbox and changed the value to "9" before submitting it, in my background page, it reads "9" instead of pre-set value of "0" from this input element. </p>
  
  <p>If every user changed the value and submit, it will completely thrashed my DB. How is this possible and am I supposed to encrypt the page or do something prior to submitting? I am totally lost, btw I am using PHP.</p>