AVERTISSEMENT: mysqli_fetch_all () s'attend à ce que le paramètre 1 soit mysqli_result, bool donné en c: \ newxammp \ htdocs \ learn \ index.php sur la ligne 11
#where you are running mysqli_query , add 'or die( mysqli_error($db)'
#e.g
$sql = "SELECT * FROM users";
$result = mysqli_query($db, $sql) or die( mysqli_error($db));
#$db being the variable holding the connection to db
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