phpMyAdmin - Error

The [a@./url.php?url=http%3A%2F%2Fphp.net%2Fmanual%2Fen%2Fbook.mysqli.php&lang=en&token=2398f1b4b875ea9bf7e7c7c831ae6665@Documentation]mysqli extension is missing. Please check your PHP configuration. <a href="Documentation.html#faqmysql" target="documentation"><img class="icon" src="./themes/pmahomme/img/b_help.png" width="11" height="11" alt="Documentation" title="Documentation" /></a>