Sending Requests to the Database
After connecting to the database, you can send
queries to it. This is done using the mysqli_query function.
The first parameter of this function takes the
variable in which we stored the result of
mysqli_connect, and the second - a string
with the SQL query.
For example, let's execute a query that will fetch
all records from the users table:
<?php
$res = mysqli_query($link, 'SELECT * FROM users');
?>
The query text does not have to be written directly
in the function parameter mysqli_query.
Let's put it into a variable:
<?php
$query = 'SELECT * FROM users';
$res = mysqli_query($link, $query);
?>
