[TOC] ## 异步读文件 ``` //方法一 swoole_async_readfile(string $filename, mixed $callback); //方法二 bool swoole_async_read(string $filename, mixed $callback, int $size = 8192, int $offset = 0); ``` ## 异步写文件 最大写入为4M,最后一个参数如果加`FILE_APPEND` 则追加文字 ``` $file_content ="test 要写入的内容".PHP_EOL; swoole_async_writefile(__DIR__.'/test.log', $file_content, function($filename) { echo "wirte ok.{$filename}".PHP_EOL; }, FILE_APPEND); ``` ### 使用场景 可再 http_server中加入访问日志 ``` $http->on('request',function ($request,$response){ $conent = [ 'date:'=>date('Y-m-d H:i:s',time()), 'get:'=>$request->get, 'post:'=>$request->post, 'header:'=>$request->header, ]; swoole_async_writefile(__DIR__ . '/access.log', json_encode($conent,JSON_UNESCAPED_UNICODE), function (){}, FILE_APPEND); $response->end('<h1>HTTPserver</h1>'); }); ```