title: Is there a performance benefit single quote vs double quote in php?
body: <p>Are there any performance benefits to using single quotes instead of double quotes in php?</p>
  
  <p>In other words, would there be a performance benefit of:</p>
  
  <pre><code>$foo = 'Test';
  </code></pre>
  
  <p>versus</p>
  
  <pre><code>$foo = "Test";
  </code></pre>