concatenation error when instantiating PDO

Question

I have the connection PDO with mysql down below:

 $dsn = 'mysql:host=' . self::$hostname . '; dbname=' . self::$dbname;
 $opcoes = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES UTF8');

 self::$conexao = new PDO( 
                              $dsn,
                              self::$username, 
                              self::$password, 
                              $opcoes
                          );

that works perfectly.

But if I put the contents of variable $dsn next to string of connection as below error which seems to me to be of concatenation.

Will someone please help me find out where that mistake is?

$opcoes = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES UTF8');

 self::$conexao = new PDO( "mysql:
                              host=" . self::$hostname . "; 
                              dbname=" . self::$dbname,
                              self::$username, 
                              self::$password, 
                              $opcoes
                          );

Answer 1

I’m guessing it’s the line break. try like this:

new PDO( "mysql:host=".self::$hostname.";dbname=". self::$dbname, self::$username, self::$password, $opcoes);