There are several pieces of data in the php statistics database

The materials that need to be prepared are: computer, php editor, and browser.

1. First, open the php editor and create a new php file, for example: index.php. (Recommended learning: PHP programming from entry to proficiency)

2. In index.php, enter the code:

$conn = new mysqli('10.5.15.177', 'root', '', 'test');
$sql = "select * from stu";
$r = $conn->query($sql);
print_r($r->num_rows);

3. The browser runs the index.php page, and the number of records in the stu table is printed out as 5.

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