How can PHP developers ensure proper data output organization in web pages when retrieving and displaying information from multiple database tables?

To ensure proper data output organization in web pages when retrieving and displaying information from multiple database tables, PHP developers can use JOIN queries to fetch related data from different tables in a single query. By organizing the retrieved data into associative arrays or objects, developers can easily structure and display the information on the web page. 

<?php
// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

// Retrieve data from multiple tables using JOIN query
$sql = "SELECT users.username, orders.order_id, orders.total_amount FROM users
        INNER JOIN orders ON users.user_id = orders.user_id";
$result = $conn->query($sql);

// Organize the retrieved data into associative arrays
$data = array();
while($row = $result->fetch_assoc()) {
    $data[] = $row;
}

// Display the information on the web page
foreach($data as $row) {
    echo "Username: " . $row['username'] . "<br>";
    echo "Order ID: " . $row['order_id'] . "<br>";
    echo "Total Amount: $" . $row['total_amount'] . "<br><br>";
}

// Close the database connection
$conn->close();
?>

Keywords

SQL joins data normalization PHP arrays data filtering data pagination

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