无法通过linux上的套接字连接到本地MySQL服务器

Question

我尝试在 ubunto 上运行一个 php 脚本，每次我使用 sudo php -f /opt/lampp/htdocs/scanner/server/start.php 运行它时都会收到此消息。

服务器：正在运行...

PHP 致命错误：带有消息的未捕获异常“PDOException” 'SQLSTATE[HY000] [2002] 无法通过连接本地 MySQL 服务器 套接字'/var/run/mysqld/mysqld.sock'（2）'在 /opt/lampp/htdocs/scanner/server/start.php:26 堆栈跟踪： /opt/lampp/htdocs/scanner/server/start.php(26): PDO->__construct('mysql:host=loca...', 'root', 'datakvarnen') /opt/lampp/htdocs/scanner/server/start.php(51): openConnection() {main} 在第 26 行的 /opt/lampp/htdocs/scanner/server/start.php 中抛出

我试过php -m 我明白了

[PHP 模块] bcmath bz2 calendar Core ctype date dba dom ereg exif fileinfo filter ftp gettext hash iconv json libxml mbstring mhash mysql mysqli openssl pcntl pcre PDO pdo_mysql Phar posix readline 反射会话 shmop SimpleXML soap sockets SPL 标准 sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter zip zlib

[Zend 模块]

我用sudo yum install php-pdo 和sudo yum install php-pdo_mysql 得到的所有信息都说它已经安装了。

编辑：这是整个 start.php 文件

<?php

$ip     = "127.0.0.1";
$port   = 5012;

error_reporting(E_ALL);

set_time_limit(0);
ob_implicit_flush();

if(!$server = socket_create(AF_INET, SOCK_STREAM, 0)){
    echo socket_strerror(socket_last_error()); exit;
}

if(!socket_bind($server, $ip, $port)){
    echo socket_strerror(socket_last_error()); exit;
}

if(!socket_listen($server, 5)){
    echo socket_strerror(socket_last_error()); exit;
}

echo "Server: Running...\n\n";

function openConnection($db = "scanner"){
    $pdo = new PDO("mysql:host=localhost;dbname={$db};",'root','datakvarnen');
    $pdo -> setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $pdo -> exec("SET CHARACTER SET utf8");
    return $pdo;
}

function sendMessage($connection, $message){
    $message .= "\r\n".chr(0);
    socket_write($connection, $message, strlen($message));
    usleep(5);
}

function readMessage($s){
    //TODO: Fix so it can read any lenght
    $message = @socket_read($s, 1024*10);

    if($message === false){
        return false;
    }

    return $message;
}

//The server is added in the $clients
//The reason for this is because new connection comes as read.
openConnection();
$clients = array();
$null = null;

while(true){
    //Copy $clients so the list doesn't get modified by socket_select();
    $read = $clients;
    $write = $clients;
    $read[] = $server;

    //Wait for read or write
    $ready = socket_select($read, $write, $null, 0);

    //Check if the servers is among the $read clients
    //If it is, then a someone new is trying to connect.
    if(in_array($server, $read)){
        //Search to find the server in $clients
        //It's needed since socket_select() demand we use $read instead of $server
        foreach($read as $client){
            if($client == $server){
                //We found the new connection, and accepts it.
                //TODO: Make a verify code to check it's a scanner.jar that joins
                $new = socket_accept($client);
                $clients[] = $new;
                continue 2;//<-- $server was found, so no need to search anymore.
            }
        }
    }

    foreach($read as $client){
        $message = readMessage($client);

        if($message === false){
            //Socket is closed or lost connection
            $key = array_search($client, $clients);
            unset($clients[$key]);
            continue 2;
        }else{
            //You got the message
            echo $message;
        }
    }

    foreach($write as $client){
        sendMessage($client,rand(0,99999));
    }

    sleep(1);
}

socket_close($server);

Answer 1

不，这不是正确的位置，我没有运行 mysqld 文件夹

好的，那么您需要更改套接字的位置。您可以通过在 DSN 中指定每个 PDO 实例级别来执行此操作，也可以通过在 php.ini 中指定来批量执行此操作。

对于PDO_Mysql DSN 的文档中定义的 PDO：

$pdo = new PDO("mysql:unix_socket=/path/to/your/mysqld.sock;dbname={$db};",'root','datakvarnen');

在php.ini 中找到mysql.default_socket 并更改它：

mysql.default_socket = /path/to/your/mysqld.sock

虽然它对我来说是个谜，除非它使用 TCP DSN（使用 IP 地址或主机名而不是 localhost 作为 DSN 中的主机属性）或者您使用不同的 php.ini用于 CLI 和网络服务器（这并不少见）。