"As of PHP 5.1, when called with no arguments, mktime() throws an E_STRICT notice: use the time() function instead."
http://php.net/manual/en/function.mktime.php
If you want to use dates/times, I recommend DateTime instead.
Pregunta
Are there any differences between using functions time() and mktime() with default parameters to obtain current timestamp?
Solución
"As of PHP 5.1, when called with no arguments, mktime() throws an E_STRICT notice: use the time() function instead."
http://php.net/manual/en/function.mktime.php
If you want to use dates/times, I recommend DateTime instead.