Help!!!populating associative array

Anon

please look at this graph
002

003 004 005

006 007 008 009 010 011
(it's a tree)
I need to know who is the parent(002) and who is the child(003,004,005) so i use associative array to differentiate it. Here is my code

for ($j=0; $j<=count ($meta); $j++){
$query = "select * from mem_data where sp_ic = '$meta[$j]'";
//echo "$query";
$result = mysql_query($query);
while ($row = mysql_fetch_array($result)) {
//echo "".$row["ic_no"]."";
$meta[] = $row["ic_no"];
$children[] = $row["ic_no"];
}
$children2 = $children;
for ($i =0;$i<count($children);$i++){
$child[] = array ($meta[$j]=>array ($children2 => $i));
echo " ",$children2[$i];
echo $meta[$j]," ";
}
}

and i try to print it through these way

reset ($child);
while (list($key,$value) = each ($child)){
echo "Parent: $key \n";
while (list($key2,$value2) = each ($value)){
echo "Child : $key2 \n";
while (list($key3) = each ($value2)){
echo "Child2 : $key3, \n";
}
}
}

echo "important";
foreach ( $child as $key => $val ){
echo $key, " ";
foreach ($val as $val2 => $val3){
echo $val2,"-->",$val3;
}
}

and here is the result

Parent: 0
Child : 002
Parent: 1
Child : 002
Parent: 2
Child : 002
Parent: 3
Child : 003
Parent: 4
Child : 003
Parent: 5
Child : 004
Parent: 6
Child : 004
Parent: 7
Child : 005
Parent: 8
Child : 005
important0
002-->Array1
002-->Array2
002-->Array3
003-->Array4
003-->Array5
004-->Array6
004-->Array7
005-->Array8
005-->Array
i thought parent should return the number (002,003,004..) but instead it give out 0,1,2,3 and the parent(node) output is switch into Child, why?? and even if i try to print out the $key3 array there is nothing, does this mean it is not properly populated?

To those who know please help, any suggestion is welcome and if anyone knows where to find a detail tutorial on ASSOCIATIVE array please tell me.

Thanks for your assistance

cwyong

Anon

The only two possible mistake is either the way i populate the associative array is wrong

for ($i =0;$i<count($children);$i++){
$child[] = array ($meta[$j]=>array ($children2 => $i));

or the way i print it
reset ($child);
while (list($key,$value) = each ($child)){
echo "Parent: $key \n";
while (list($key2,$value2) = each ($value)){
echo "Child : $key2 \n";
while (list($key3) = each ($value2)){
echo "Child2 : $key3, \n";
}
}
}

please tell me where i am wrong.

cwyong

Anon

Part of your problem is with the brackets in this line,
$child[] = array ($meta[$j]=>array ($children2 => $i));

Empty brackets basically tell PHP to auto-increment the key.
So this code,
$child[]="one";
$child[]="two";

is identical to this:
$child[0]="one";
$child[1]="two";

I'm having a little trouble conceptualizing your task (too much complexity, too little sleep), but maybe what you want is something like this:

$child[$meta[$j]] = array ($children2 => $i);

HTH,
Beth

Anon

Thanks Beth, it gave me what i want. Now the code run like this:

for ($i =0;$i<count($children2);$i++){
$child[$meta[$j]] = array ($i=>$children2);
echo " ",$children2[$i];
echo $meta[$j]," ";
}
and i use these code to print it:

foreach ( $child as $key =>$val){
echo " ","start";
echo $key, " ";
foreach ($val as $val3 => $val4){
echo $val3,"-->";
foreach ($val4 as $val5){
echo $val5," ";
}
echo "end";
}
}

The output:
start002
2-->003
004
005
end
start003
1-->006
007
end
start004
1-->008
009
end
start005
1-->010
011
end

well one thing i aren't expecting is the output of $i and is going to be usefull. Once again thank u Beth.

Next stop GD.

cwyong