title: Is a URL query parameter valid if it has no value with equal symbol?
body: <p>This is really similar to this question : <a href="https://stackoverflow.com/questions/4557387/is-a-url-query-parameter-valid-if-it-has-no-value">Is a url query parameter valid if it has no value?</a></p>
  
  <p>However what if I still use the symbol <code>=</code> like:</p>
  
  <pre><code>http://example.com/foo?bar=&amp;pam=e
  </code></pre>
  
  <p>Reason is that I use built-in function to generate URL, and when I set <code>bar</code> to nothing, it does this in shown format.</p>