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Editorial Team
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Asked: 2026-06-06T03:31:48+00:00

I am trying to learn how to create and test for the expiration of

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I am trying to learn how to create and test for the expiration of a timestamp. I set up a simple example, trying to test for a timestamp that has expired, but it does not seem to work correctly, and I was wondering if anyone could help me figure out why it wouldn’t echo ‘valid’ and ‘expired’ in the appropriate times?

<?php

echo'
<html>
<head>
</head>
<body>';

//set static current time
$timestamp = 1340037073;

if($timestamp <= strtotime("+10 minutes", $timestamp)){
    echo "Valid";
}else{
    echo "Expired";
}


echo'
</body>
</html>';




?>
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1 Answer

  1. Editorial Team

    current time is obtained with time() function, so $timestamp should contain the time obtained from the external source, like database, or whatever, to be checked against current time, to see if it has expired:

    //test timestamp
$timestamp = 1340037073;

//check if it has expired (600 = 60*10 seconds = 10 minutes)
if ((time() - $timestamp) < 600)
{
  echo 'valid';
}
else
{
  echo 'expired';
}

    Hope it works for you 🙂

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