如何使用php删除目录中的旧文件

Question

I have a directory for database backups, and a PHP script that makes a backup of the database every day. But after a month or so i will have 30 files in the backup directory. How can i write a PHP script that deletes old backup files every day so that there are always 10 backup files in my directory? when a new backup is stored, the oldest backup file will be deleted and so on ...

Answer 1

After making the backup with the PHP backup you loop through the directory and then remove the oldest backup files:

$files = glob('backupfolder/*.bak');
if(count($files) > 10)
  foreach($files as $file)
    if(time() - filectime($file) > 10 * 24 * 60 * 60)
      unlink($file);