I have an app_id and a current date. actually I want to update my database if the current date and the stored date is greater than 4. I'm doing this:
$app_id = $_GET['ap'];
$current_date=date('d');
$a = array($app_id => $current_date);
$fp = fopen("time.txt",'r');
$last_run = unserialize(file_get_contents("time.txt"))[$app_id];
if(abs($last_run-$current_date) > 2)
{
$fp = fopen("time.txt", 'w');
fwrite($fp, serialize($a));
}
But the problem in this is when i switch the app it will again update the database because I'm using writing mode which is over writing the text file. I can use append mode. then how can i search in the array stored in the file and get that particular date corresponding that app_id and then append that date suitably. Thanks in advance
You need to read the file and unserialize the whole array into a variable, then you can test and update any part of the array and then write the whole array back to your file.
Also file_get_contents() and file_put_contents() do not need you to open a file handle it does it all internally.
$app_id = $_GET['ap'];
$current_date = date('d');
$last_run = unserialize(file_get_contents("time.txt"));
if(abs($last_run[$app_id] - $current_date ) > 2 ) {
// change the last run date for this app
$last_run[$app_id] = $current_date;
file_put_contents('time.txt', serialize($last_run));
}
You really ought to be doing some checking in here as well.