Can't initialize a PDO object in a class as a property [duplicate]

Answer 1

Only constant values can be used as initializers for class properties. Do it in the constructor:

class core {

    public $dbh = null;

    public function __construct() {
        $this->dbh = new PDO("mysql:dbname=newdbnaem;host=1.1.1.1:1111", "owner", "passwordlulz");
    }

}

This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated.

http://www.php.net/manual/en/language.oop5.properties.php