Simple PHP script help, if/else/timestamps/ less than / bit-shift

I am trying to make a timestamp function that checks which displays a time if it has been less than 24 hours and a date if it has been more. If anybody knows of a prebuilt way to do this please let me know.

Anyways, I've started with this simple php which is suppose to return a number less than 86400 if $temprow1 or 2 are less than 86400 seconds from now, or echo full if it has been over a day. This code outputs both as numbers, which it should not. Can somebody please help me figure out what's wrong. Thanks!

$temprow1 = 1278867245;
$temprow2 = 1258567245;

$tempvar008 = time()-$temprow1;
$tempvar009 = time()-$temprow2;

if($tempvar008 << 86400){echo $tempvar008;}else{echo 'full';}
echo '<br>';
if($tempvar009 << 86400){echo 开发者_C百科$tempvar009;}else{echo 'full';}

You use a single < for less-than comparisons. << is for bit-shifting.

I'm not sure what the << is about in the context of an if, but try this:

$temprow1 = 1278867245;
$temprow2 = 1258567245;

$tempvar008 = time()-$temprow1;
$tempvar009 = time()-$temprow2;

if($tempvar008 < 86400){echo $tempvar008;}else{echo 'full';}
echo '</br>';
if($tempvar009 < 86400){echo $tempvar009;}else{echo 'full';}

$stamp1 = 1234567890;
$stamp2 = 1234567891;
$stampd = $stamp2 - $stamp1;
if ($stampd < 86400) // code for showing time difference
else // code for showing date difference

To continue using your code instead, please replace << with <.