Check variable value if change inside the Loop

[®0L¥ <rolygc@xxxxxxxxx>]

Hello World,

I have a question regarding loops, How I can check inside a loop if a
variable chage a value, for example

$sql = mysql_query("SELECT model FROM table")

while($row=mysql_fetch_array){
    $model = $row['model'];
    echo "First model: ".$model."<br />";
   * // if $model chage its model value*
*   // echo "Second Model: ".$model."<br />"*
}

Thank you world !!!!!


-- 
salu2 ®0L¥