Directory being deleted randomly by unknown script - php

Question

I have set up a simple "Facebook" like timeline system for my friend to be able to upload statuses with images for his users to see. It seemed to all be working well although the file which stores the images keeps being deleted, and I can't seem to purposely cause the problem myself so I have no idea what is removing this directory?
I have added the upload/remove scripts below to see if anybody might be able to assist me here? I can't seem to find any part of the script which would delete the main image directory on its own?
PLEASE BARE IN MIND - This is still unfinished, and is nowhere near secure just yet, we are in testing phase and need to fix this problem before I can work on perfecting the system.
The main folder for storage of the images is post_images, this is the directory which is being deleted.
REMOVE DIR FUNCTION -
function rrmdir($dir) {
foreach(glob($dir . '/*') as $file) {
if(is_dir($file)) rrmdir($file); else unlink($file);
}
rmdir($dir);
}
DECLINE POSTS -
if(isset($_GET['decline_post'])){
$post_id = $conn->real_escape_string($_GET['decline_post']);
$getimagefolder = mysqli_fetch_assoc(mysqli_query($conn, "SELECT `post_image_folder` FROM `Pto6LsuQ_posts` WHERE `post_id` = '$post_id'"));
$image_folder = $getimagefolder['post_image_folder'];
mysqli_query($conn,"DELETE FROM `Pto6LsuQ_posts` WHERE `post_id` = '$post_id'");
$direc = 'post_images/'.$image_folder;
if (file_exists($direc)) {
rrmdir($direc);
} else {
}
header("Location: members_area.php");
}
DELETE POST -
if(isset($_GET['delete_post'])){
$post_id = $conn->real_escape_string($_GET['delete_post']);
$getimagefolder = mysqli_fetch_assoc(mysqli_query($conn, "SELECT `post_image_folder` FROM `Pto6LsuQ_posts` WHERE `post_id` = '$post_id'"));
$image_folder = $getimagefolder['post_image_folder'];
mysqli_query($conn,"DELETE FROM `Pto6LsuQ_posts` WHERE `post_id` = '$post_id'");
$direc = 'post_images/'.$image_folder;
if (file_exists($direc)) {
rrmdir($direc);
} else {
}
header("Location: members_area.php");
}
UPLOAD POST -
if(isset($_POST['new_post'])){
$post_status = $conn->real_escape_string($_POST['status']);
$user_id = $_SESSION['user_id'];
if(!empty($_FILES['images']['tmp_name'])){
$length = 9;
$search = true; // allow the loop to begin
while($search == true) {
$rand_image_folder = substr(str_shuffle("0123456789"), 0, $length);
if (!file_exists('../post_images/'.$rand_image_folder)) {
$search = false;
}
}
mkdir("../post_images/".$rand_image_folder);
foreach($_FILES['images']['tmp_name'] as $key => $tmp_name ){
$file_name = $key.$_FILES['images']['name'][$key];
$file_size = $_FILES['images']['size'][$key];
$file_tmp = $_FILES['images']['tmp_name'][$key];
$file_type = $_FILES['images']['type'][$key];
$check_file_type = substr($file_type, 0, strrpos( $file_type, '/'));
if($check_file_type !== 'image'){
header('Location: ../members_area.php?posterror=1');
}
$extensions = array("jpeg","jpg","png","JPEG","JPG","PNG");
$format = trim(substr($file_type, strrpos($file_type, '/') + 1));
if(in_array($format,$extensions) === false){
header('Location: ../members_area.php?posterror=1');
} else {
move_uploaded_file($file_tmp,"../post_images/".$rand_image_folder."/".$file_name);
$file = "../post_images/".$rand_image_folder."/".$file_name;
$cut_name = substr($file, strpos($file, "/") + 1);
$cut_name = explode('/',$cut_name);
$cut_name = end($cut_name);
$newfile = "../post_images/".$rand_image_folder."/thb_".$cut_name;
$info = getimagesize($file);
list($width, $height) = getimagesize($file);
$max_width = '350';
$max_height = '250';
//try max width first...
$ratio = $max_width / $width;
$new_width = $max_width;
$new_height = $height * $ratio;
//if that didn't work
if ($new_height > $max_height) {
$ratio = $max_height / $height;
$new_height = $max_height;
$new_width = $width * $ratio;
}
if ($info['mime'] == 'image/jpeg') $image = imagecreatefromjpeg($file);
elseif ($info['mime'] == 'image/gif') $image = imagecreatefromgif($file);
elseif ($info['mime'] == 'image/png') $image = imagecreatefrompng($file);
$image = imagecreatetruecolor($new_width, $new_height);
$photo = imagecreatefromjpeg($file);
imagecopyresampled($image, $photo, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagejpeg($image, $newfile, 70);
}
}
if($account_type < 4){
$post_public = 1;
} else {
$post_public = 0;
}
mysqli_query($conn,"INSERT INTO `Pto6LsuQ_posts`
(post_id,post_user_id,post_date_time,post_status,post_image_folder,post_likes,post_public_status)
VALUES ('','$user_id',NOW(),'$post_status','$rand_image_folder','0','$post_public')");
} else {
if($account_type < 4){
$post_public = 1;
} else {
$post_public = 0;
}
mysqli_query($conn,"INSERT INTO `Pto6LsuQ_posts`
(post_id,post_user_id,post_date_time,post_status,post_image_folder,post_likes,post_public_status)
VALUES ('','$user_id',NOW(),'$post_status','','0','$post_public')");
}
header('Location: ../members_area.php?posterror=2');
}