File Upload in CodeIgniter

File Upload in CodeIgniter — a practical guide to CodeIgniter file upload with clear examples you can reuse in real projects.

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Short description

Validate size/extension, then move the file to a safe directory outside or inside public as needed.

Upload handler

$file = $this->request->getFile('document');
if (! $file->isValid()) {
    return redirect()->back()->with('error', $file->getErrorString());
}
$name = $file->getRandomName();
$file->move(WRITEPATH . 'uploads', $name);