Codeigniter - Issue while uploading png image - codeigniter-3

Question

I have implemented a web service for update profile image using Codeigniter framework. But I have an issue while uploading png image. It always gives an error saying -
The filetype you are attempting to upload is not allowed.
Following is my config array:
$config = array(
'upload_path' => BASEPATH .'../assets/uploads/profile_images',
'allowed_types' => 'jpg|png|jpeg',
'overwrite' => TRUE,
'max_size' => "2048000",
);
I have added "png" in allowed types, still it is showing error.
Please guide.

Answer 1

Instead of using
config['allowed_types'] = 'jpg|png|jpeg'
I changed my config array to
$config = array(
'upload_path' => BASEPATH .'../assets/uploads/profile_images',
'allowed_types' => '*',
'overwrite' => TRUE,
'max_size' => "2048000",
);
And added custom form validation rule
$this->form_validation->set_rules('profile_image', '', 'callback_file_check');
and its corresponding function named file_check(). Here I will be checking file type and will return an error if it is not an image.
/**
Function: file_check
Description: file value and type check during validation
Date: 6th July 2018
**/
public function file_check($str)
{
$allowed_mime_type_arr = array('image/gif','image/jpeg','image/pjpeg','image/png','image/x-png');
$mime = mime_content_type($_FILES['profile_image']['tmp_name']);
if(isset($_FILES['profile_image']['tmp_name']) && $_FILES['profile_image']['tmp_name']!="")
{
if(in_array($mime, $allowed_mime_type_arr))
{
return true;
} else {
$this->form_validation->set_message('file_check', 'Please select only jpg/jpeg/png file.');
return false;
}
}else{
$this->form_validation->set_message('file_check', 'Please choose a file to upload.');
return false;
}
}
So my upload function will look like this
if($this->form_validation->run() == true) {
if (!$this->upload->do_upload('profile_image')) {
return $this->response(['msg'=>$this->upload->display_errors(),'success'=>false,'code'=>400]);
} else {
$fileName = $this->upload->data();
$name = $fileName['file_name'];
}
//Save into database
$image = $this->Api_model->update_profile_image('assets/uploads/profile_images/'.$name, $request_data['user_id']);
if($image)
return $this->response(['msg'=>'Image updated successfully','success'=>true,'code'=>200, 'image_path' => base_url().$image]);
else
return $this->response(['msg'=>'Image updated failed','success'=>false,'code'=>400]);
} else {
return $this->response(['msg' => validation_errors(), 'success' => false, 'code' => 401]);
}