title: PHP explode string by dot if the next character is a space or an uppercase alphabetic character
body: <p>I have a paragraph that looks like this:</p>
  
  <blockquote>
    <p>Lorem Ipsum is simply (not <strong>1.2%</strong>) dummy text of the printing and typesetting
    industr<strong>y. L</strong>orem Ipsum has been the industry's standard dummy text ever
    since the 1500s, when an unknown printer took a galley of type and
    scrambled it to make a type specimen boo<strong>k. I</strong>t has survived not only
    five centuries, but also the leap into electronic typesetting,
    remaining essentially unchang<strong>ed. I</strong>t was popularised in the 1960s</p>
  </blockquote>
  
  <p>I want to split this in pharagraph in phrases ended by a dot <code>.</code> but only when that dot is at the end of a phrase, not in the middle (like <code>1.2%</code>) and when there is an <code>UPPERCASE</code> character after it(and maybe a blank space too). For example if i use:</p>
  
  <pre><code>$arr = explode('.', $paragraph);
  </code></pre>
  
  <p>it will split that paragraph at each occurrence of that <code>.</code>.</p>
  
  <p>Is there a fast and clean way to obtain that? If yes can somebody please help me understand it?</p>