导出 csv

<?php

// 头部标题
$csv_header = ['名称','性别','年龄'];
// 内容
$csv_body = [
    ['张三','男','13'],
    ['李四','女','13'],
    ['王五','男','13'],
    ['赵六','未知','13']
];

// 打开文件资源，不存在则创建
$fp = fopen('test.csv','a');  // 文件地址，默认根目录。可修改
// 处理头部标题
$header = implode(',', $csv_header) . PHP_EOL;
// 处理内容
$content = '';
foreach ($csv_body as $k => $v) {
    $content .= implode(',', $v) . PHP_EOL;
}
// 拼接
$csv = $header.$content;
// 写入并关闭资源
fwrite($fp, $csv);
fclose($fp);

导入 csv

<?php

$handle = fopen(storage_path('app/is_tx_project.csv'), 'rb');
$data = [];
while (!feof($handle)) {
    header('content-type: text/html; charset=utf-8');
    $fields = fgetcsv($handle);

    if($fields === false){
        break;
    }
    $data[] = $fields;
}
fclose($handle);

print_r($data);