php cannot select database

php cannot select the database

We may report the following error when selecting the database. How to solve it? Get up and study.

Warning: mysqli_select_db() expects exactly 2 parameters, 1 given in D:\wamp\www\test\connect.php on line 8

When PHP connects to the database:

There is no problem connecting to the database with mysqli_connect, but there is always an error when using mysqli_select_db!

After careful observation of mysql_select_db and mysqli_select_db, I found that

●The incoming parameters of mysql_select_db are (databaseName, query);

●The incoming parameters of mysqli_select_db are (query, databaseName );

The order of the incoming parameters of the two connection methods is not the same, so the selection fails.

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