how to get the first and last days of a given month

Question

I wish to rewrite a mysql query which use month() and year() functions to display all the posts from a certain month which goes to my function as a \'Y-m-d\' parameter forma

Answer 1

I know this question has a good answer with 't', but thought I would add another solution.

$first = date("Y-m-d", strtotime("first day of this month"));
$last = date("Y-m-d", strtotime("last day of this month"));