PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

276 Chapter 11 Accessing Your MySQL Database from the Web with PHP
Several variations can be used to get results from a result identifier. Instead of an array
with named keys, you can retrieve the results in an enumerated array with
mysqli_fetch_row(), as follows:
$row = $result->fetch_row($result);
or
$row = mysqli_fetch_row($result);
The attribute values are listed in each of the array values $row[0], $row[1], and so on.
(The mysqli_fetch_array() function allows you to fetch a row as either or both kinds
of array.)
You could also fetch a row into an object with the mysqli_fetch_object() function:
$row = $result->fetch_object();
or
$row = mysqli_fetch_object($result);
You can then access each of the attributes via $row->title, $row->author, and so on.
Disconnecting from the Database
You can free up your resultset by calling either
$result->free();
or
mysqli_free_result($result);
You can then use
$db->close();
or
mysqli_close($db);
to close a database connection. Using this command isn’t strictly necessary because the
connection will be closed when a script finishes execution anyway.
Putting New Information in the Database
Inserting new items into the database is remarkably similar to getting items out of the
database.You follow the same basic steps: make a connection, send a query, and check the
results. In this case, the query you send is an INSERT rather than a SELECT.
Although this process is similar, looking at an example can sometimes be useful. In
Figure 11.3, you can see a basic HTML form for putting new books into the database.
The HTML for this page is shown in Listing 11.3.