resizing image in codeigniter php not working correctly - php

Question

I am trying to resize multiple images using codeigniter, my file upload code in controller looks like below:
$this->load->library('upload');
$image = array();
$ImageCount = count($_FILES['pimage']['name']);
for($i = 0; $i < $ImageCount; $i++){
$_FILES['file']['name'] = $_FILES['pimage']['name'][$i];
$_FILES['file']['type'] = $_FILES['pimage']['type'][$i];
$_FILES['file']['tmp_name'] = $_FILES['pimage']['tmp_name'][$i];
$_FILES['file']['error'] = $_FILES['pimage']['error'][$i];
$_FILES['file']['size'] = $_FILES['pimage']['size'][$i];
// File upload configuration
$uploadPath = './uploads/products/';
$config['upload_path'] = $uploadPath;
$config['allowed_types'] = 'jpg|jpeg|png|gif';
// Load and initialize upload library
$this->load->library('upload', $config);
$this->upload->initialize($config);
// Upload file to server
if($this->upload->do_upload('file')){
// Uploaded file data
$imageData = $this->upload->data();
$uploadImgData[] = $imageData['file_name'];
$this->resizeImage($imageData['file_name']);
}
}
public function resizeImage($filename)
{
$source_path = './uploads/products/' . $filename;
$target_path = './uploads/products/';
$config_manip = array(
'image_library' => 'gd2',
'source_image' => $source_path,
'new_image' => $target_path,
'maintain_ratio' => TRUE,
'width' => 500,
);
$this->load->library('image_lib', $config_manip);
if (!$this->image_lib->resize()) {
echo $this->image_lib->display_errors();
}
$this->image_lib->clear();
}
Here I have two issues, first one is only the first image is getting resized, multiple images are not. Second thing is: if portrait image is uploaded its turned into landscape after conversion. Can anyone please tell me what is wrong in here, thanks in advance