title: Does sleep time count for execution time limit?
body: <p>I have two questions concerning the <code>sleep()</code> function in PHP:</p>
  
  <ol>
  <li><p>Does the sleep time affect the maximum execution time limit of my PHP scripts? Sometimes, PHP shows the message "maximum execution time of 30 seconds exceeded". Will this message appear if I use <code>sleep(31)</code>?</p></li>
  <li><p>Are there any risks when using the <code>sleep()</code>function? Does it cost a lot of CPU performance?</p></li>
  </ol>