title: mysql is array in multiple columns
body: <p>I have a string in the form <code>$string = 'London,Paris,Birmingham'</code> and I want to search multiple columns for occurences of these values.</p>
  
  <p>For example <code>WHERE events.name, events.cities, events.counties IN (".($string).")</code></p>
  
  <p>Can someone recommend me a simple and short way of doing something like this.</p>