title: Format any number to three digits?
body: <p>I want to insert any number was entered by the user, to the database like a three digits.</p>
  
  <p>e.g. if the user insert ( 1 ) i want to save the number as ( 001 ), or ( 20 ) to ( 020 ).</p>
  
  <p>note: The data type of the database column is string not integer.</p>