move all files in a folder to another?

Please try this solution, it's tested successfully ::

<?php
  $files = scandir("f1");
  $oldfolder = "f1/";
  $newfolder = "f2/";
  foreach($files as $fname) {
      if($fname != '.' && $fname != '..') {
          rename($oldfolder.$fname, $newfolder.$fname);
      }
  }
?>

A slightly verbose solution:

// Get array of all source files
$files = scandir("source");
// Identify directories
$source = "source/";
$destination = "destination/";
// Cycle through all source files
foreach ($files as $file) {
  if (in_array($file, array(".",".."))) continue;
  // If we copied this successfully, mark it for deletion
  if (copy($source.$file, $destination.$file)) {
    $delete[] = $source.$file;
  }
}
// Delete all successfully-copied files
foreach ($delete as $file) {
  unlink($file);
}