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，每次我运行它与 sudo php -f /opt/lampp/htdocs/scanner/server/start.php 我都会收到这条消息。

Server: Running...

PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' in /opt/lampp/htdocs/scanner/server/start.php:26 Stack trace: /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} thrown in /opt/lampp/htdocs/scanner/server/start.php on line 26

我试过 php -m 我得到

[PHP Modules] 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 Reflection session shmop SimpleXML soap sockets SPL standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter zip zlib

[Zend Modules]

我得到的 sudo yum install php-pdo 和 sudo yum install php-pdo_mysql 它说它已经安装了。

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

No that's not the right location, I have no mysqld folder in run

好的，那么您需要更改插座的位置。您可以通过在 DSN 中指定它在每个 PDO 实例级别执行此操作，或者您可以通过在 php.ini.

中指定它来批量执行此操作

对于 PDO_Mysql DSN 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

虽然对我来说你的主页是如何工作的是个谜，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）或者你使用的是CLI 和网络服务器不同 php.ini（这并不罕见）。

无法通过 linux 上的套接字连接到本地 MySQL 服务器

Can't connect to local MySQL server through socket on linux

php

mysql

sockets

pdo