What are common performance issues when populating a PHP array from a database query?

Common performance issues when populating a PHP array from a database query include fetching unnecessary data, inefficient query execution, and memory consumption. To improve performance, you can optimize your query by selecting only the required columns, fetching data in batches instead of all at once, and using appropriate data structures to store the results efficiently.

// Example code snippet for optimizing database query performance
$query = "SELECT id, name FROM users";
$result = mysqli_query($connection, $query);

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

// Use the $users array as needed