I want to be able to +1 to $i
every page reload.
I have come across a very simple issue, that I am struggling to find a solution online.
Heres my code:
$backupNumber = fopen("$v", "r+") or die("Unable to open file!");
$i = fread($backupNumber,filesize("invoices/invoice1/backupN.txt"));
$i = intval($i);
$i = $i + 1;
echo $i;
fwrite($backupNumber,$i);
$a = "invoices/" . $invoiceN . "/backup" . $i;
fclose($backupNumber);
and in the txt file is simply the number '1' to start off with.
The issue occurs when reloading the page when I echo $i it outputs:
2 then 13 then 1214 then 12131215 then 2147483648 etc.
I want it to simple output
2 then 3 then 4 etc
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