Mega Code Archive
Just some real-life functions you can call to perform common datetime
<![CDATA[
conversions between
MySQL datetime format, MySQL timestamp format and UNIX timestamp (i.e. seconds after
epoch) with "human" output.
<?
//we use UNIX's time specification as the base specification
function mysql_datetime_to_human($dt)
{
$yr=strval(substr($dt,0,4));
$mo=strval(substr($dt,5,2));
$da=strval(substr($dt,8,2));
$hr=strval(substr($dt,11,2));
$mi=strval(substr($dt,14,2));
// $se=strval(substr($dt,17,2));
return date("M/d/Y H:i", mktime ($hr,$mi,0,$mo,$da,$yr))." MST";
}
function mysql_timestamp_to_human($dt)
{
$yr=strval(substr($dt,0,4));
$mo=strval(substr($dt,4,2));
$da=strval(substr($dt,6,2));
$hr=strval(substr($dt,8,2));
$mi=strval(substr($dt,10,2));
//$se=strval(substr($dt,12,2));
return date("M/d/Y H:i", mktime ($hr,$mi,0,$mo,$da,$yr))." MST";
}
function mysql_timestamp_to_timestamp($dt)
{
$yr=strval(substr($dt,0,4));
$mo=strval(substr($dt,4,2));
$da=strval(substr($dt,6,2));
$hr=strval(substr($dt,8,2));
$mi=strval(substr($dt,10,2));
$se=strval(substr($dt,10,2));
return mktime($hr,$mi,$se,$mo,$da,$yr);
}
function mysql_datetime_to_timestamp($dt)
{
$yr=strval(substr($dt,0,4));
$mo=strval(substr($dt,5,2));
$da=strval(substr($dt,8,2));
$hr=strval(substr($dt,11,2));
$mi=strval(substr($dt,14,2));
$se=strval(substr($dt,17,2));
return mktime($hr,$mi,$se,$mo,$da,$yr);
}
function timestamp_to_mysql($ts)
{
$d=getdate($ts);
$yr=$d["year"];
$mo=$d["mon"];
$da=$d["mday"];
$hr=$d["hours"];
$mi=$d["minutes"];
$se=$d["seconds"];
return sprintf("%04d%02d%02d%02d%02d%02d",$yr,$mo,$da,$hr,$mi,$se);
}
function timeleft($begin,$end)
{
//for two timestamp format dates, returns the plain english difference between them.
//note these dates are UNIX timestamps
$dif=$end-$begin;
$years=intval($dif/(60*60*24*365));
$dif=$dif-($years*(60*60*24*365));
$months=intval($dif/(60*60*24*30));
$dif=$dif-($months*(60*60*24*30));
$weeks=intval($dif/(60*60*24*7));
$dif=$dif-($weeks*(60*60*24*7));
$days=intval($dif/(60*60*24));
$dif=$dif-($days*(60*60*24));
$hours=intval($dif/(60*60));
$dif=$dif-($hours*(60*60));
$minutes=intval($dif/(60));
$seconds=$dif-($minutes*60);
$s="";
//if ($years<>0) $s.= $years." years ";
//if ($months<>0) $s.= $months." months ";
if ($weeks<>0) $s.= $weeks." weeks ";
if ($days<>0) $s.= $days." days ";
if ($hours<>0) $s.= $hours." hours ";
if ($minutes<>0) $s.= $minutes." minutes ";
//if ($seconds<>0) $s.= $seconds." seconds ";
return $s;
}
?>
]]>