Image Upload and Validation in CodeIgniter

Image Upload and Validation in CodeIgniter — a practical guide to CodeIgniter image upload with clear examples you can reuse in real projects.

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Short description

For images, validate type carefully and optionally resize with the Image library.

Image rules + move

$validation = ConfigServices::validation();
$validation->setRules([
    'avatar' => 'uploaded[avatar]|is_image[avatar]|max_size[avatar,2048]',
]);
if (! $validation->withRequest($this->request)->run()) {
    return redirect()->back()->withInput()->with('errors', $validation->getErrors());
}
$img = $this->request->getFile('avatar');
$img->move(FCPATH . 'uploads');