title: Make text between asterisks bold
body: <p>I wanted to make a PHP function that would make text bold between double asterisks, and italic between one asterisk, <em>(quite like the editor on stackoverflow)</em>.</p>
  
  <p>Same rules apply, if there's a space between the * and the word, it shouldn't render.</p>
  
  <p>Who can help me out?
  I tried to, but I only came this far, as I don't know how to make the odd asterisks "&lt; b >" and the even ones "&lt; /b >". </p>
  
  <p><em>(I can't type them without the spaces, stackoverflow will render the text between as bold.....)</em></p>
  
  <pre><code>$thenewtext = str_replace("**", "&lt;b&gt;", "**Hello World** of PHP");
  </code></pre>