php监控文件变化

<?php

$process = new \Swoole\Process(function(){
    $filename = "a.conf";
    $md5file = md5_file($filename);
    while(true){
        $newMd5 = md5_file($filename);

        if(strcmp($md5file,$newMd5) !== 0){
            echo "old".$md5file.PHP_EOL;
            echo 'new'.$newMd5.PHP_EOL;
            echo "文件被修改了".date("Y-m-d H:i:s").PHP_EOL;
            $md5file = $newMd5;
        }
    }
});

$process->start();

$process::wait();