php record id

php uniq record id, data id datetimer

function uniq2($_document)
{$today=getdate();
$random=rand();
$year=$today[year];
$year=substr($year,2);
$microtime = srand((double)microtime()*1000000);
list($usec, $sec) = explode(" ", microtime());
$usec=substr($usec,5,3);
$_result = $_document.$year.$today[mon].$today[mday].$today[hours].$today[minutes].$microtime.$today[seconds].$usec.$random ;
return $_result;}

e.g. : $_datetimer=uniq2('IH')