help with arrays

[EchoFool]

Hey im slightly stuck with an array im trying to while loop as i think i got it slightly wrong =/

 

The while loop is built with this:

<?php
While loop etc {
   $a[] = $row['ID'];  //contructing the array
}
?>

 

 

Then i tried this to while loop it:

<?php
While($a){
$Select = mysql_query("SELECT CityID FROM mitable WHERE ID='$a' GROUP BY CityID")
Or die(mysql_error());
$row = mysql_fetch_assoc($Select);
$CityID = $row['CityID'];
Echo $CityID.'<br>';
// rest of while loop here unrelated to it
}
?>

 

Can you see where i went wrong?

[The Little Guy]

Your loop should be formatted like this:

 

while(argument){
     // loop data
}

[EchoFool]

Your loop should be formatted like this:

 

while(argument){
     // loop data
}

 

What is argument ? Is that a built in php function ?