title: Regexp to search for strings like 'cpt' => on Notepad++
body: <p>I'm trying to build a list of array of mime types for PHP. I got a long list of mime types but I need to remove all the <code>'xxx' =&gt;</code> upfront. How to detect them using regexp cos I tried <code>'[\u][a-z0-9]' =&gt;</code>  and it didn't work.</p>
  <pre><code>    'cpt' =&gt; 'application/mac-compactpro',
      'cpt' =&gt; 'application/x-compactpro',
      'cpt' =&gt; 'application/x-cpt',
      'crl' =&gt; 'application/pkcs-crl',
      'crl' =&gt; 'application/pkix-crl',
      'crt' =&gt; 'application/pkix-cert',
      'crt' =&gt; 'application/x-x509-ca-cert',
      'crt' =&gt; 'application/x-x509-user-cert',
      'csh' =&gt; 'application/x-csh',
      'csh' =&gt; 'text/x-script.csh',
      'css' =&gt; 'application/x-pointplus',
  </code></pre>