php unable to delete Images - php

Question

I have below code to delete posts from my website. This function is working for video posts and it delete video post perfectly. But it is not working for image posts and does not delete post image from web directory. My code is
function delete_post($id, $fromStory = false) {
$post = get_post($id);
if ($fromStory and !$post['is_story']) return true;
if (!$fromStory and !can_edit_post($post)) return false;
if ($post['images']) {
$images = perfectUnserialize($post['images']);
if($images) {
foreach($images as $image) {
delete_file(path($image));
}
}
if ($post['video']) {
delete_file(path($post['video']));
}
}
Besides i have delete old stories function given below
function delete_old_stories() {
$time = time() - (3600 * config('story-deleted-at', 24));
$query = db()->query("SELECT id,post_id FROM story_posts WHERE time_created < $time ");
while($fetch = $query->fetch(PDO::FETCH_ASSOC)) {
db()->query("DELETE FROM story_posts WHERE id=?", $fetch['id']); //delete story posts
delete_post($fetch['post_id'], true);
}
return true;
}
This is delete file function
function delete_file($path)
{
$basePath = path();
$basePath2 = $basePath . '/';
if ($path == $basePath or $path == $basePath2) return false;
if (is_dir($path) === true) {
$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path), RecursiveIteratorIterator::CHILD_FIRST);
foreach ($files as $file) {
if (in_array($file->getBasename(), array('.', '..')) !== true) {
if ($file->isDir() === true) {
rmdir($file->getPathName());
} else if (($file->isFile() === true) || ($file->isLink() === true)) {
unlink($file->getPathname());
}
}
}
return rmdir($path);
} else if ((is_file($path) === true) || (is_link($path) === true)) {
return unlink($path);
}
return false;
}
For each story, Image file in directory is
_1000_8f81946314be5cfe962480b96c7df11e.jpg
For Post, Image files in directory are
_1000_8f81946314be5cfe962480b96c7df11e.jpg
_600_8f81946314be5cfe962480b96c7df11e.jpg
Delete Story is working fine and it delete story images but delete post does not delete images.