phpMyAdmin - Error

The [a@./url.php?url=http%3A%2F%2Fphp.net%2Fmanual%2Fen%2Fbook.mysqli.php&lang=en&token=91d51619f2cccd795e36a30993710971@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>