PHP

Instead of using func_get_args() with count() function, consider using PHP's built-in function func_num_args() to count number of arguments of the function.

This is a micro-optimization. Apply it in case of intensive usage.

One or more compute intensive functions like count, database calls(mysqli_query, mysqli_fetch_assoc, etc.) is being used in the loop condition. Though using these functions is a cheap operation; however, there's still the function call overhead when calling it on each iteration.