title: remove characters from form input on submit
body: <p>I have a <code>form</code> on my website with a mobile telephone number <code>input</code>.</p>
  
  <p>I am using validation that allows the user to either enter: </p>
  
  <pre><code>a: 0 7725 878 811
  b: +44 7725 878 811
  </code></pre>
  
  <p>I would like to remove the first 0 or +44 when submitting the <code>form</code> so that the value that ends up in the database is simply 7725 878 811</p>
  
  <p>What would be the best way to go about this?</p>
  
  <p>Different to marked as duplicate as it is not validation I have an issue with, it is with cleaning the value upon submit</p>