Question

Why is this giving error?

class content {
    protected $id,$title,$content,$image,$imagedirectory,$page;
    protected $sid = md5(time()); //In this line : parse error, expecting `','' or `';''
}

Answer 1

md5(time()) is an expression.

Field initializations are not allowed to use expressions, only literals.

Instead, you could do:

class content {
    protected $id, $title, $content, $image, $imagedirectory, $page, $sid;

    public function __construct()
    {
        $this->sid = md5(time());
    }
}