Problemas na Execução rotina PHP

Caros amigos, alguém poderia me informar o que acontece com as variáveis na execuçõa do meu script, pois ao executar o PHP nforma que as mesmas não foram declaradas, é alguma configuraçõa, obrigado.Vejam abaixo sysout:Notice: Use of undefined constant CODIGO - assumed 'CODIGO' in c:\inetpub\wwwroot\index.php on line 9Notice: Use of undefined constant ARTISTA - assumed 'ARTISTA' in c:\inetpub\wwwroot\index.php on line 10Notice: Use of undefined constant ALBUM - assumed 'ALBUM' in c:\inetpub\wwwroot\index.php on line 11Notice: Use of undefined constant PRECO - assumed 'PRECO' in c:\inetpub\wwwroot\index.php on line 12Notice: Use of undefined constant IMAGEM - assumed 'IMAGEM' in c:\inetpub\wwwroot\index.php on line 13Notice: Use of undefined constant CODIGO - assumed 'CODIGO' in c:\inetpub\wwwroot\index.php on line 15Notice: Use of undefined constant ARTISTA - assumed 'ARTISTA' in c:\inetpub\wwwroot\index.php on line 16Notice: Use of undefined constant ALBUM - assumed 'ALBUM' in c:\inetpub\wwwroot\index.php on line 17Notice: Use of undefined constant PRECO - assumed 'PRECO' in c:\inetpub\wwwroot\index.php on line 18Notice: Use of undefined constant IMAGEM - assumed 'IMAGEM' in c:\inetpub\wwwroot\index.php on line 19