In PHP, how can you ensure that a query for data from the previous month will work effectively in a database that spans multiple years?

When querying data from the previous month in a database that spans multiple years, it is important to consider the year as well. One way to ensure the query works effectively is to dynamically construct the date range for the previous month based on the current date. This can be achieved by using PHP date functions to calculate the start and end dates of the previous month, taking into account the year boundary.

// Calculate the start and end dates of the previous month
$first_day_prev_month = date('Y-m-01', strtotime('first day of previous month'));
$last_day_prev_month = date('Y-m-t', strtotime('last day of previous month'));

// Construct the query using the calculated date range
$query = "SELECT * FROM your_table WHERE date_column >= '$first_day_prev_month' AND date_column <= '$last_day_prev_month'";