What are the potential pitfalls of using the "ORDER BY RAND()" function in MySQL queries in PHP?

Using the "ORDER BY RAND()" function in MySQL queries can be inefficient and slow, especially with large datasets, as it requires MySQL to generate a random number for each row and then sort them. Instead, a common workaround is to fetch all the rows into an array in PHP and then shuffle the array to achieve a random order.

// Fetch all rows into an array
$query = "SELECT * FROM table_name";
$result = mysqli_query($connection, $query);

$rows = [];
while ($row = mysqli_fetch_assoc($result)) {
    $rows[] = $row;
}

// Shuffle the array to achieve a random order
shuffle($rows);

// Loop through the shuffled array to display the results
foreach ($rows as $row) {
    // Display the data
}