update code

app/Exports/UsersExport.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Exports;
+
+use Maatwebsite\Excel\Concerns\FromCollection;
+use Maatwebsite\Excel\Concerns\WithHeadings;
+use Maatwebsite\Excel\Concerns\WithMapping;
+use PhpOffice\PhpSpreadsheet\Shared\Date;
+use Maatwebsite\Excel\Concerns\ShouldAutoSize;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
+use PhpOffice\PhpSpreadsheet\Style\Color;
+use PhpOffice\PhpSpreadsheet\Style\Conditional;
+use Maatwebsite\Excel\Concerns\WithTitle;
+use Maatwebsite\Excel\Concerns\WithCustomStartCell;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
+use Maatwebsite\Excel\Concerns\WithPreCalculateFormulas;
+use Maatwebsite\Excel\Concerns\WithEvents;
+use Maatwebsite\Excel\Events\BeforeExport;
+use Maatwebsite\Excel\Events\BeforeWriting;
+use Maatwebsite\Excel\Events\BeforeSheet;
+use Maatwebsite\Excel\Events\AfterSheet;
+
+class UsersExport 
+implements 
+    FromCollection, 
+    WithHeadings, 
+    WithMapping, 
+    ShouldAutoSize, 
+    WithTitle,
+    WithCustomStartCell
+{
+    protected $users;
+
+    public function __construct($users){
+        $this->users = $users;
+    }
+
+    public function collection()
+    {
+        return $this->users;
+    }
+
+    public function headings(): array
+    {
+        return [
+            'Mã',
+            'Tên',
+            'Email',
+            'Số điện thoại',
+            'Ngày sinh',
+            'Chức danh',
+            'Phòng ban',
+            'Kích hoạt',
+        ];
+    }
+
+    public function map($user): array
+    {
+        return [
+            $user->id,
+            $user->name,
+            $user->email,
+            $user->tel,
+            explode(' ', $user->birthday)[0],
+            $user->title_id,
+            $user->department_id,
+            $user->active,
+        ];
+    }
+
+    public function title(): string
+    {
+        return 'Danh sách người dùng';
+    }
+
+    public function startCell(): string
+    {
+        return 'A1';
+    }
+
+}