How to delete files from directory based on creation date in php?

Question

I have a cache folder that stores html files. They are overwritten when needed, but a lot of the time, rarely used pages are cached in there also, that just end up using sp

Answer 1

The below function lists the file based on their creation date:

private function listdir_by_date( $dir ){
  $h = opendir( $dir );
  $_list = array();
  while( $file = readdir( $h ) ){
    if( $file != '.' and $file != '..' ){
      $ctime = filectime( $dir . $file );
      $_list[ $file ] = $ctime;
    }
  }
  closedir( $h );
  krsort( $_list );
  return $_list;
}

Example:

$_list = listdir_by_date($dir);

Now you can loop through the list to see their dates and delete accordingly:

$now = time();
$days = 1;
foreach( $_list as $file => $exp ){
  if( $exp < $now-60*60*24*$days ){
    unlink( $dir . $file );
  }
}