How important is it to refer to the PHP manual for proper usage of functions like strtotime?

It is crucial to refer to the PHP manual for proper usage of functions like strtotime to ensure that the function is being used correctly and efficiently. The PHP manual provides detailed explanations, examples, and parameters for each function, helping developers understand how to use them effectively in their code.

$date = strtotime('2022-01-01');
echo date('Y-m-d', $date);