PHP connection problem with MySQL

You are using single quotes on your connection.

Variables within single quotes are not compiled by PHP, so the server is literally trying to connect to the user '$usuario' , to the host '$hostnome' with the password '$senha' and not to the value contained in the variables , as you wish.

Remove the single quotes that should work:

<?php $conexao= mysql_connect( $hostnome, $usernome , $senha);

NOTE: The mysql_ * functions are being deprecated by PHP, so you may want to work with something newer and more secure, such as mysqli or PDO.

Your hostname has been blocked by MySQL because it exceeds the default of 10 attempts ... Open the console of your MySQL and enter:

mysql> SET GLOBAL max_connect_errors=10000;

Reference: link

The first error was explained by Matthew, there should be no single quotes in your mysql_connect. After many attempts to connect with error your host has been blocked, you have to unlock it with the command: mysqladmin flush-hosts to be able to access again.

It works locally because the local mysql configuration must be different from the remote configuration.

I would also like to stress that you should abandon the mysql commands * replacing at least mysqli * under the risk of one day your site will stop working.

$hostnome = '192.185.176.204';
$usernome = 'tookc892';
$senha = '***';
$dbname = 'nome_banco';
$conexao = mysql_connect("$hostnome", "$usernome", "$senha");
$sel_banco = mysql_select_db("$dbname");

You forgot the semicolon after the $ password variable; Still need to select the database ... You should run $ connection, so I could leave it without defining it, like this:

$hostnome = '192.185.176.204';
$usernome = 'tookc892';
$senha = '***';
$dbname = 'nome_banco';
mysql_connect("$hostnome, $usernome, $senha");
mysql_select_db("$dbname");

<?php
//Arquivo de conexão com o Banco de Dados
try{
    $driver = 'mysql';
    $host = '192.185.176.204';
    $usuario = 'tookc892';
    $senha = '***';
    $dbname = 'nome_banco';

    $conn = new PDO("$driver:host=$host;dbname=$dbname", $usuario, $senha); 
} catch (PDOException $e){
    echo "Erro ao conectar no banco de dados $dbname <BR/>";
    echo $e->getMessage();
    die();
}

?>

A connection example in POO, I used to use it I think it's working ...

class Db{

//Variáveis Privadas//

private $user       = 'root';
private $password   = 'senha';
private $database   = 'nomedobanco';
private $host       = 'localhost'; 

/**************************************
*              Conectar              *
*      Função de conexão protected   *
**************************************/
 protected function conect(){
   if( mysql_connect($this->host, $this->user, $this->password)){
       if(!mysql_select_db($this->database)){
            return ('Erro na seleção do banco');
       }else{
            return true;
       }
   }else{        
       return ('Não foi possível conectar ao banco de dados.');
   }
 }
}

I hope it helps ...