如果时间戳超过24小时，请更改文本颜色

Question

We have a PHP script to check the dates on files hosted on our server to check they are being updated regularly. We need to know if the files haven't been updated for over 24 hours. Presently the script just shows the date and time of the last upload but we need it to highlight the text in red if the file is more than 24 hours old.

Here is the code that we use:

$filename = 'filename.csv';
if (file_exists($filename)) {
  echo "<img src='images/image.jpg' width=200> ".date ("D d F Y H:i:s", filemtime($filename));
}

Thanks.

Answer 1

Give this a try:

<?php

$yesterday = new DateTime('-24 hours');
$fileTime = new DateTime(filemtime($filename));

$style = ($yesterday > $fileTime) ? 'color: red;' : 'color: black';

We create a datetime, and tell it to be 24 hours in the past. Then another based on the filetime. If $yesterday is still later than $fileTime, the style is set to red, if not black. Then you just echo it:

<span style="<?= $style; ?>">Text to highlight</span>