title: Encode URL with PHP, show + instead of %20
body: <p>I want to encode the post's title so I can add it to my URLs. The problem is that urlencode() gives me an URL such as:</p>
  
  <p>Title:</p>
  
  <pre><code>Samsung Nexus S + Hard Case
  </code></pre>
  
  <p>URL:</p>
  
  <pre><code>Samsung%20Nexus%20S%20+%20Hard%20Case
  </code></pre>
  
  <p>And I want one more friendly like:</p>
  
  <pre><code>Samsung+Nexus+S+Hard+Case
  </code></pre>
  
  <p>I don't know what should happen to the '+' symbol. How can I do this?</p>