Php versions – CDbConnection failed to open the DB connection: SQLSTATE[HY000] [2002] No such file or directory PHP+DOCKER+YII+MYSQL

Im fighting with this problem since last week.

I have a project in php 5.6 with YII V.1. Im using MySQL 8.3 because is the only one permitted for my mac architecture.

I set up the project in a Docker and everything looks fine until the app ask me for the credentials
to get in. Once i press submit i get this error:

/var/www/html/fw/1.1.16/framework/db/CDbConnection.php(399)

387                 throw new CDbException('CDbConnection.connectionString cannot be empty.');
388             try
389             {
390                 Yii::trace('Opening DB connection','system.db.CDbConnection');
391                 $this->_pdo=$this->createPdoInstance();
392                 $this->initConnection($this->_pdo);
393                 $this->_active=true;
394             }
395             catch(PDOException $e)
396             {
397                 if(YII_DEBUG)
398                 {
399                     throw new CDbException('CDbConnection failed to open the DB connection: '.
400                         $e->getMessage(),(int)$e->getCode(),$e->errorInfo);
401                 }
402                 else
403                 {
404                     Yii::log($e->getMessage(),CLogger::LEVEL_ERROR,'exception.CDbException');
405                     throw new CDbException('CDbConnection failed to open the DB connection.',(int)$e->getCode(),$e->errorInfo);
406                 }
407             }
408         }
409     }
410     /**

I checked into the docker that DB is running okey and db credentials are ok.

INFO ABOUT SOCKETS:
yktoo-db | 2024-05-14T16:23:01.937766Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: ‘::’ port: 33060, socket: /var/run/mysqld/mysqlx.sock
yktoo-db | 2024-05-14T16:23:01.937783Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: ‘8.3.0’ socket: ‘/var/run/mysqld/mysqld.sock’ port: 3306 MySQL Commu

.YML file:

services:
    app:
        build:
            context: .
            dockerfile: ./Dockerfile-app
        container_name: yktoo-app
        ports:
            - "80:80"
        volumes:
            - /Users/xxx/Desktop/sar/var/www/html:/var/www/html
    db:
        build:
            context: .
            dockerfile: ./Dockerfile-db
        container_name: yktoo-db
        environment:
            MYSQL_ROOT_PASSWORD: "xxxx"

Here is the fragment of code for the connection:

'db'=>array(                 
'connectionString' => 'mysql:host=yktoodb;port=3306;dbname=phpmyadmin;
unix_socket=/var/run/mysqld/mysqld.sock',                 'emulatePrepare' => true,                
'username' => 'xxx',              
'password' => 'xxx',                 
'charset' => 'utf8',`

Any ideas?? Thank u very much!

I tried changing the yktoo-db for the ip but it didnt work.
I tried using yktoo-db:3306 but it didnt work.