Array outside while doesn't function - php

Question

Sorry for the beginner question.
I'm searching about an hour, but I can't understand why my $row outside from the second while doesn't function... The name variable run just the $row var doesn't function...
$i = 0;
while($i < 8)
{
$str = "SELECT * FROM `$name[$i]`";
$result = mysql_query($str, $connessione);
$l = mysql_num_rows($result);
while($l > 1)
{
$strs = "SELECT * FROM `$name[$i]` WHERE `Livello` = '$l'";
$results = mysql_query($strs, $connessione);
$row[$i][$l] = mysql_fetch_array($results);
if I put here the echo I can view the mysql variable
echo $row[$i][$l]['var'];
$l--;
}
if I put here echo $row[$i][$l]['var']; he send me the error " Undefined offset"
$i++;
}
Hope you can help me...

Answer 1

In the place where you put:
echo $row[$i][$l]['var'];
$l value is 0 and you set $row values for $l from 1 to mysql_num_rows($result)
if you put there:
echo $row[$i][1]['var'];
it should work fine assuming mysql_num_rows($result) was more than 1 element.
Probably your code should look like this:
$i = 0;
while($i < 8)
{
$str = "SELECT * FROM `$name[$i]`";
$result = mysql_query($str, $connessione);
$l = mysql_num_rows($result);
while($l > 0) // changed 1 to 0
{
$strs = "SELECT * FROM `$name[$i]` WHERE `Livello` = '$l'";
$results = mysql_query($strs, $connessione);
$row[$i][$l] = mysql_fetch_array($results);
if i put here the echo i can view the mysql variable
echo $row[$i][$l]['var'];
$l--;
}
// added extra loop to display array values
$whileIndex = 0;
while (true) {
if (!isset($row[$i][$whileIndex]['var']) {
break;
}
echo $row[$i][$whileIndex]['var']; // should work
++$whileIndex;
}
$i++;
}

Answer 2

When you try to use echo, $i = 8 and $l = 1. These keys doesn´t exists in your array.