## Spreadsheet 支持excel 函數 公式使用
```
<?php
namespace app
# 給類文件的命名空間起個別名
use PhpOffice\PhpSpreadsheet\Spreadsheet;
# Xlsx類 將電子表格保存到文件
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
# 實例化 Spreadsheet 對象
$spreadsheet = new Spreadsheet();
# 獲取活動工作薄
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue('A1','10');
$sheet->setCellValue('B1','15');
$sheet->setCellValue('C1','20');
$sheet->setCellValue('D1','25');
$sheet->setCellValue('E1','30');
$sheet->setCellValue('G1','35');
$sheet->setCellValue('A2', '總數：');
$sheet->setCellValue('B2', '=SUM(A1:G1)');
$sheet->setCellValue('A3', '平均數：');
$sheet->setCellValue('B3', '=AVERAGE(A1:G1)');
$sheet->setCellValue('A4', '最小數：');
$sheet->setCellValue('B4', '=MIN(A1:G1)');
$sheet->setCellValue('A5', '最大數：');
$sheet->setCellValue('B5', '=MAX(A1:G1)');
$sheet->setCellValue('A6', '最大數：');
$sheet->setCellValue('B6', '\=MAX(A1:G1)'); // 使用轉義字符
// 批量賦值
$sheet->setCellValue('A1','ID');
$sheet->setCellValue('B1','姓名');
$sheet->setCellValue('C1','年齡');
$sheet->setCellValue('D1','身高');
$sheet->fromArray(
[
[1,'歐陽克','18歲','188cm'],
[2,'黃蓉','17歲','165cm'],
[3,'郭靖','21歲','180cm']
],
3,
'A2'
);
// 合并單元格 合并后，賦值只能給A1，開始的坐標。
$sheet->mergeCells('A1:B5');
$sheet->getCell('A1')->setValue('歐陽克');
# Xlsx類 將電子表格保存到文件
$writer = new Xlsx($spreadsheet);
$writer->save('1.xlsx');
// 客戶端文件下載
header('Content-Type:application/vnd.ms-excel');
header('Content-Disposition:attachment;filename=1.xls');
header('Cache-Control:max-age=0');
$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xls');
$writer->save('php://output');
```
### 讀取表格文件
```
<?php
namespace app;
# 創建讀操作
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');
# 打開文件、載入excel表格
$spreadsheet = $reader->load('1.xlsx');
# 獲取活動工作薄
$sheet = $spreadsheet->getActiveSheet();
# 獲取 單元格值 和 坐標
$cellC1 = $sheet->getCell('B2');
echo '值: ', $cellC1->getValue(),PHP_EOL;
echo '坐標: ', $cellC1->getCoordinate(),PHP_EOL;
$sheet->setCellValue('B2','歐陽鋒');
# 獲取 單元格值 和 坐標
$cellC2 = $sheet->getCell('B2');
echo '值: ', $cellC2->getValue(),PHP_EOL;
echo '坐標: ', $cellC2->getCoordinate();
```
#### 導入功能
```
<?php
$file = $_FILES['file']['tmp_name'];
# 載入composer自動加載文件
require 'vendor/autoload.php';
# 載入方法庫
require 'function.php';
# 創建讀操作
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');
# 打開文件、載入excel表格
$spreadsheet = $reader->load($file);
# 獲取活動工作薄
$sheet = $spreadsheet->getActiveSheet();
# 獲取總列數
$highestColumn = $sheet->getHighestColumn();
# 獲取總行數
$highestRow = $sheet->getHighestRow();
# 列數 改為數字顯示
$highestColumnIndex = \PhpOffice\PhpSpreadsheet\Cell\Coordinate::columnIndexFromString($highestColumn);
$log = [];
for($a=2;$a<$highestRow;$a++){
$title = $sheet->getCellByColumnAndRow(1,$a)->getValue();
$cat_fname = $sheet->getCellByColumnAndRow(2,$a)->getValue();
$cat_name = $sheet->getCellByColumnAndRow(3,$a)->getValue();
$price = $sheet->getCellByColumnAndRow(4,$a)->getValue();
$img = $sheet->getCellByColumnAndRow(5,$a)->getValue();
$cat_fid = find('shop_cat','id','name="'.$cat_fname.'"');
$cat_id = find('shop_cat','id','name="'.$cat_name.'"');
$data = [
'title' => $title,
'cat_fid' => $cat_fid['id'],
'cat_id' => $cat_id['id'],
'price' => $price,
'img' => $img,
'add_time' => time(),
];
$ins = insert('shop_list',$data);
if($ins){
$log[] = '第'.$a.'條，插入成功';
}else{
$log[] = '第'.$a.'條，插入失敗';
}
}
echo json_encode(['code'=>0,'msg'=>'成功','data'=>$log]);
```
