title: Return by reference in PHP
body: <p>I tried Googling, tried PHP Documentation, searched Stack Overflow for an answer but couldn't find anything satisfactory. I was reading a book in which author have made use of Return by Reference but never explained what it is. The code used by the author is</p>
  
  <pre><code>function &amp;getSchool() {
      return $this-&gt;school;
  }
  </code></pre>
  
  <p>Can someone explain in simple words with an example about this concept.</p>