while循环与赋值运算符

Question

I can't seem to figure out how this loop works in PHP:

$people = array();
while($row = $result->fetch_assoc())
    $people[] = $row;

It seems as though the loop would just keep going, infinitely. But, it doesn't How exactly does this work? Can someone explain it to me step-by-step? I'm guessing that the while loop could also be written like this:

while(($row = $result->fetch_assoc()) == true)

Answer 1

The fetch_assoc fetches one result row at a time and stores it in $row. Since this is in a loop, you are fetching until you run out of rows

In the loop you are essentially pushing the $row value into a $people array