php logic

[davidf85]

I am trying to understand PHP While Loops.

 

For example.

$info=mysql_fetch_array($query);

will create an array of a mysql query.

 

how does while($info=mysql_fetch_array($query)

{

echo $info['1'];

}

 

ensure that each element of the array is echoed.  It seems that $info is a one time statement that grabs an array,

how does adding While make it capable of being extended into rows? To me this says While this is true, do this.

But if it is true once, how does PHP know when to stop?

 

 

[Pandemikk]

It's not the while loop that's fetching the array, it's mysql_fetch_array that's fetching the array.

 

http://php.net/manual/en/function.mysql-fetch-array.php

[Alex]

Every time mysql_fetch_array is called, as is mentioned on the manual page, the resource's internal data pointer is moved ahead one. If there are no more rows left, then false is returned, thus stopping the while loop.