En primer lugar, parece un poco extraño tener user_name2,time2,etc. para la segunda consulta. ¿Es realmente así como está configurado en su base de datos?
De todos modos, aquí hay una forma de generar gráficos desde dentro de sus bucles PHP.
echo('<div id="placeholder"></div>');
echo('<script>');
while($info = mysql_fetch_array( $data ))
{
$user = $info['user_name']; //It’s the name of user analyzed at the moment
/*
This query extract the first ten more recents values (order by time DESC)
The data retrieved by the query are used to paint the 1° chart for emails sent by the user
but I don't know how to do it recursively
*/
$query = "SELECT user_name,mail_sent,mail_received,time FROM table1 WHERE user_name='$user' ORDER BY time DESC LIMIT 0,10";
$result = mysql_query($query);
$dataset1 = new Array();
while($row = mysql_fetch_assoc($result))
{
$row['time']=$row['time']*1000; //The time is in millisecond I need to multiply for 1000 in order to obtain the seconds
//the 'time' row is the x-axis , the 'mail_send' row is the y-axsis
$dataset1[] = array($row['time'],$row['mail_sent']); //It contains the time value and the numbers of email sent from the user
}
echo('$.plot( $(\'<div style="width:600px;height:300px;"></div>\').appendTo(\'#placeholder\'),'.json_encode($dataset1).',options);\n');
}
echo('</script>');
