PHP generates a timestamp with a specified number of digits (13 digits)

/**

*

* Returns a timestamp with a certain number of digits. The number of digits is determined by the parameter.

*

* @author Chen Bo

* @param type How many digits the timestamp has?

* @return Timestamp

*/

private function getTimestamp($digits = false) {

$digits = $digits > 10 ? $digits : 10;

$digits = $digits - 10;

if ((!$digits) || ($digits == 10))

{

return time();

}

else

{

return number_format(microtime(true),$digits,'','');

}

}