That's not the only syntactical problem, but the general structure of the Human class is ok.

Just for those people learning from this topic, the syntax errors include:

• Class property declarations need 'var' (PHP4, supported in PHP5 = 'public'), 'public', 'private' or 'protected'.
  
  PHP Code:

  // Original
$fname;
$lname;
$mname;
$age;

// Fixed
private $fname;
private $lname;
private $mname;
private $age; 

• Braces around variable names are generally reserved to being used inside double-quoted strings. If you're concatenating variables and strings, there's no need for them.
  
  PHP Code:

  // Original
echo "hello ".{$this->fname}." ".{$this->lname}." ".$this->mname;

// Fixed
echo 'Hello '.$this->fname.' '.$this->lname.' '.$this->mname; 


Are you clear on what OOP is all about because no-one has really explained anything in this topic, yet. It's not quite as simple as wrapping functions up within a class!