如何使用 UTF-8 | 添加阿拉伯语

我获取了 PDF，但阿拉伯文的字符像是 "??????" 问号图标 **composer.js** "barryvdh/laravel-dompdf": "^2.0", **app.js** 'providers' => [ Barryvdh\DomPDF\ServiceProvider::class, ], 'aliases' => [ 'PDF' => Barryvdh\DomPDF\Facade::class, ] **controller** $pdf = PDF::loadView('admin.invoice.invoicepdf', ['invoices' => $invoices,]); return $pdf->stream();