What?: A While Loop That Checks if a Function is True Calls That Function?

[davidshq]

Hi Folks,

I'm looking at a snippet of PHP code that looks like this:

while ($this->update_table_structure())
{
    $this->update_table_structure();
}

I'm confused as to what this achieves? It sounds to me like it is saying:

while we are updating the table structure keep on updating the table structure?

[justsomeguy]

Yeah, that looks pretty stupid.  Seems like you could accomplish the same thing with this:

while ($this->update_table_structure());

You don't need a body of the loop at all.  Also a question is why "update table structure" needs to be called multiple times sequentially instead of just once.