thanks CyberSpatium, I have done everything explained by other fellow but nothing work right. I had to uninstall and install several tme wamp5 to make it work again.
I'm learning php and mysql using the book "Core web development" by Marc Wandschneider' . He use this script in the book to make connection to the datebase:
<?php
$conn = @new mysqli('localhost', 'user' , 'password',
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