[SOLVED] How is this While Do loop moving forward?

[pandu]

Hi,

 

Check out the code below. I dont understand how the while..do loop keeps looping because instead of having a condition, there is an assignment statement. Can someone explain how this loop is working? Shouldn't there be two equal symbols in those condition brackets? By the way, the function containing this code takes a table and adds $data to the $table. The code snippet below builds the query to add the data

 

while (list($columns,) = each($data)) {

  $query .= ' ' . $columns . ' , ';

}

 

TIA

[cunoodle2]

It is some essence while there are still things to assign.

 

If there are no longer things to assign then it will be false.  It will loop through each one and assign them.  Once there aren't any more to assign then it will no longer work.  Make sense?

[pandu]

WOW! I would never have guessed that! Thanks Cunoodle - makes a lot of sense now. And I finally get how the query is being built.