<?php

require ‘vendor/autoload.php‘;

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue(‘A1‘, ‘Hello World !‘);

$writer = new Xlsx($spreadsheet);
$writer->save(‘hello world.xlsx‘);

<?php namespace App\Controllers\Test;
// 采用命名空间的方式调用这个功能

use App\Controllers\BaseController;

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

class Index extends BaseController {

    public function __construct()
    {

    }
    public function index()
    {

        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setCellValue(‘A1‘, ‘Hello World !‘);

        //输出文件到网站根目录，也就是public里面
        $writer = new Xlsx($spreadsheet);
        $writer->save(‘hello world.xlsx‘);
}

<?php namespace App\Controllers\Test;


use App\Controllers\BaseController;

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

class Index extends BaseController {

    public function __construct()
    {

    }
    public function index()
    {
        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setCellValue(‘A1‘, ‘Hello World !‘);

        header(‘Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet‘);//告诉浏览器输出07Excel文件
        //header(‘Content-Type:application/vnd.ms-excel‘);//告诉浏览器将要输出Excel03版本文件
        header(‘Content-Disposition: attachment;filename="01simple.xlsx"‘);//告诉浏览器输出浏览器名称
        header(‘Cache-Control: max-age=0‘);//禁止缓存
        $writer = new Xlsx($spreadsheet);
        $writer->save(‘php://output‘);
    }
}

//释放内存，为了防止内存泄露，进行手动清理
$spreadsheet->disconnectWorksheets();
unset($spreadsheet);

# 待读取的excel文件，全路径，如果不是cli模式，那就是网站根目录为"\",ci4默认位置为public文件夹里面
$filename = ‘test.xlsx‘;

# 根据文件名自动创建 适用于不知道文件后缀时xls还是xlsx的情况
$spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load($filename);


# 或者如果确定文件后缀，直接创建，性能会略优于上面方法
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader("Xlsx");
# $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader("Xls");
$spreadsheet = $reader->load($filename);


# 甚至可以直接指定reader实现创建 性能又会优于上面一丢丢
$reader = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
# 可以额外设定只读模式，上面也试用，让工具只读取数据，不处理样式，性能会更好
$reader->setReadDataOnly(true);
$spreadsheet = $reader->load($filename);

# 获取当前活动的sheet
$sheet = $spreadsheet->getActiveSheet();

# 或者直接指定序号获得第一个sheet
$sheet = $spreadsheet->getSheet(0);

# 读取excel中A1数据，即第一行第一列，返回“姓名”
$sheet->getCell(‘A1‘)->getValue();
# B1 返回“性别”
$sheet->getCell(‘B1‘)->getValue();

# 获取当前总行数
$rows  = $sheet->getHighestRow();
$users = [];

# 一般excel中第一行为标题，所以实际数据从第二行开始 循环读取
for($i = 2; $i <= $rows; $i++) {
    $temp = [];
    $temp[‘name‘] = $sheet->getCell(‘A‘ . $i)->getValue();
    $temp[‘sex‘] = $sheet->getCell(‘B‘ . $i)->getValue();
    $temp[‘age‘] = $sheet->getCell(‘C‘ . $i)->getValue();

    # 防止空行情况
    if (!$temp[‘name‘]) {
        continue;
    }

    $users[] = $temp;
}

var_dump($users);

# 新创建Spreadsheet对象
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();

# 获取活动的sheet
$sheet = $spreadsheet->getActiveSheet();

# 第一行写入标题数据
$sheet->setCellValue(‘A1‘, ‘姓名1‘);
$sheet->setCellValue(‘B1‘, ‘性别1‘);
$sheet->setCellValue(‘C1‘, ‘年龄1‘);

# 模拟写入的数据
$users = [
    [‘name‘ => ‘张三‘, ‘sex‘ => ‘男‘, ‘age‘ => 21,],
    [‘name‘ => ‘李四‘, ‘sex‘ => ‘女‘, ‘age‘ => 22,],
    [‘name‘ => ‘王五‘, ‘sex‘ => ‘男‘, ‘age‘ => 20,],
];

# 要写入的总行数
$count = count($users);
# 逐行写入
for ($i = 0; $i < $count; $i++) {
    # 要写入的行号 从第二行开始
    $index = $i + 2;
    # 用户数据
    $line  = $users[$i];

    $sheet->setCellValue(‘A‘ . $index, $line[‘name‘]);
    $sheet->setCellValue(‘B‘ . $index, $line[‘sex‘]);
    $sheet->setCellValue(‘C‘ . $index, $line[‘age‘]);
}

# 也可以保存为其他格式
$writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($spreadsheet);
# $writer = new \PhpOffice\PhpSpreadsheet\Writer\Xls($spreadsheet);

# 写入文件
$writer->save(‘/tmp/xxx.xlsx‘);