Is JavaScript necessary to display a database entry for a limited time in PHP?

Yes, JavaScript is necessary to display a database entry for a limited time in PHP. You can use JavaScript to set a timer that will hide the database entry after a certain period. This can be achieved by initially displaying the database entry using PHP and then using JavaScript to hide it after a specified time duration.

<?php
// Display the database entry
echo "<div id='databaseEntry'>Your database entry here</div>";
?>

<script>
// Set a timer to hide the database entry after 5 seconds
setTimeout(function() {
  document.getElementById('databaseEntry').style.display = 'none';
}, 5000); // 5000 milliseconds = 5 seconds
</script>