How can PHP developers prevent white screen errors when trying to display database content in a form select dropdown?

When trying to display database content in a form select dropdown, PHP developers can prevent white screen errors by ensuring that the database query is successful and that the fetched data is properly formatted before attempting to display it. This can be achieved by checking for errors in the query execution, handling empty result sets gracefully, and sanitizing the data to prevent any potential issues with special characters. 

// Connect to the database
$connection = new mysqli("localhost", "username", "password", "database");

// Check for connection errors
if ($connection->connect_error) {
    die("Connection failed: " . $connection->connect_error);
}

// Fetch data from the database
$query = "SELECT id, name FROM table";
$result = $connection->query($query);

// Check for query errors
if (!$result) {
    die("Error in query: " . $connection->error);
}

// Check if any rows were returned
if ($result->num_rows > 0) {
    // Output select dropdown
    echo "<select name='dropdown'>";
    while ($row = $result->fetch_assoc()) {
        echo "<option value='" . $row['id'] . "'>" . $row['name'] . "</option>";
    }
    echo "</select>";
} else {
    echo "No results found.";
}

// Close the connection
$connection->close();

Keywords

PHP database form select dropdown error prevention

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