PHP Database Reports: Create & Generate Code

To write database reports using PHP, you need to follow these steps:

1. Connect to the database: Use the mysqli or PDO extension in PHP to connect to your database. You will need to provide the database’s hostname, username, password, and database name.

$servername = "localhost";
$username = "root";
$password = "";
$dbname = "mydatabase";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

1. Database query: Retrieve data from the database using SQL query statements. You can use a SELECT statement to choose the data to be displayed in the report. Then, store the results in a variable.

$sql = "SELECT * FROM mytable";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 处理查询结果
} else {
    echo "0 结果";
}

1. Process query results: Iterate through the result set in a loop and output or handle the data of each row. You can use mysqli_fetch_assoc or the fetch method of PDOStatement to retrieve an associative array of each row.

while ($row = $result->fetch_assoc()) {
    // 输出或处理数据
}

1. Create reports: Utilize HTML, CSS, and PHP to generate the structure and style of the reports according to your needs. You can use tables, charts, or any other suitable elements to present the data.

echo "<table>";
echo "<tr><th>ID</th><th>Name</th><th>Email</th></tr>";

while ($row = $result->fetch_assoc()) {
    echo "<tr>";
    echo "<td>" . $row["id"] . "</td>";
    echo "<td>" . $row["name"] . "</td>";
    echo "<td>" . $row["email"] . "</td>";
    echo "</tr>";
}

echo "</table>";

1. Close database connection: Remember to close the database connection after generating the report.

$conn->close();

This way, you can write database reports using PHP. Depending on your needs, you may need to further optimize the structure and style of the reports, or add additional features to enhance their functionality.