Call a class function from inside another class

Question

Newbie here, trying to get this to work: I am making an online index for a library. I am using php and mySQL which I am running on an apache server. I have created a class called book which contains information about each book, and a static class called DBFunctions which contains only static functions that I call to connect and interact with the database. I'm trying to call a function from the DBFunctions class from inside the Book class but I keep getting an error. My function within the book class is:

function setTagIDs(){
   this->TagIDs = DbFunctions::getTagIdsForBook($this->BookID);
}

the dbFunction creates a select statement connects to the database and returns the result. It works fine on a test page.

But when I call it from within the class I get the following error:

Parse error: syntax error, unexpected T_OBJECT_OPERATOR in \Classes\ClassBook.php on line 111

I've looked in quite a few places but I can't figure out what the problem is, any help would be much appreciated

Thanks

Steven

Michael Berkowski · Accepted Answer · 2011-10-08 12:30:07Z

3

You are simply missing a $ on this:

  $this->TagIDs = DbFunctions::getTagIdsForBook($this->BookID);
  ^^

unexpected T_OBJECT_OPERATOR indicates a -> was encountered before it should have been there. So to interpret the error, find the first -> and look backwards.

answered Oct 8, 2011 at 12:30

Michael Berkowski

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1 Comment

Michael Berkowski Over a year ago

@user985331 Don't. You're a self-proclaimed n00b and you'll get used to how PHP reports parse errors. If you don't have one, get a text editor that supports syntax highlighting. A missing $ might become immediately obvious with syntax highlighting, depending on the editor.

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