Add a random number every 24 hours - php

Question

i need a script that automatically add a random number (between 1 and 5) every 24 hours and stores it in a text file, then after 24 hours creates a new random number and adds it to the previous result in the text file, i managed to do something close but still needs a refresh button to take effect, but i want it to automatically do it, so if 1 user visits the page every day, and one visits the page once a month, they should both see the same number (which will be read from the text file).
Here is my code so far:
<?php
$dataFile = "amt.txt";
$date1 = date("H:i:s");
$date2 = date("H:i:s",filemtime("amt.txt"));
$diff = abs(strtotime($date2) - strtotime($date1));
$secs = floor($diff);
if ($diff < 86400) {
echo "$date1 \n";
echo "$date2 \n";
printf($secs);
exit;
}
if (!file_exists($dataFile)) {
$amt = 0;
}
else {
// Otherwise read the previous value from
// the file.
$amt = (int) file_get_contents($dataFile);
}
// Generate the new value...
$Number = rand(1,5);
$total = $amt + $Number;
echo "$". $total ."/-";
// And dump it back into the file.
if (!file_put_contents($dataFile, $total)) {
// If it fails to write to the fle, you'll
// want to know about it...
echo "Failed to save the new total!";
}
?>
basically i want to show a fake number of subscribers which logically should increase with time. So i want to update the number on daily basis, then because i am having this on my website as the number of monthly subscribers, so when a user visits the website any time should see the same figure as any other user visitng the website on that exact time. Hope this is clearer now.

Answer 1

I'd first use time() instead date(xxx) so you get the diff secodns directly. But i don't get the purpose of this and don't know if you want to append the numbers or overwrite them, and also if the number changes every 24h why a user a month later should get the same number.
$date1 = time();
$date2 = filemtime("amt.txt");
$diff = $date1 - $date2;
if ($diff < 86400)
{
echo "$date1 \n";
echo "$date2 \n";
printf($diff);
exit;
}