如文档。 mysqli_query 在过程风格中使用时需要2个参数。我假设 $ connection 是您的mysqli链接尝试：

As stated in the docs. mysqli_query takes 2 parameters when used in a procedural style. I'm assuming $connection is your mysqli link Try:

$result = mysqli_query($connection, "SELECT * FROM projects ORDER BY project_title ASC");