I'm installing apriori algorithm. I want to take 1-itemset but when I combine array, the result is not exactly (before and after combine, the result is not match). Here is my code:

PHP Code:
<?php
    $transactions 
= array(
        array(
'A' => 1'B' => 0'C' => 1'D' => 1'E' => 0),
        array(
'A' => 0'B' => 1'C' => 1'D' => 0'E' => 1),
        array(
'A' => 1'B' => 1'C' => 1'D' => 0'E' => 1),
        array(
'A' => 0'B' => 1'C' => 0'D' => 0'E' => 1)
    );
    
    
// take keys of $transactions and add into $items
    
while(list($key)=each($transactions[1])){
        
$items[] = $key;
    }
        
    
// count quantity of each item in $items
    
for($i=0$i<count($transactions); $i++){
        for(
$j=0$j<count($items); $j++){
            if(
$transactions[$i][$items[$j]]==1){
                
$support[$j]++;
            }
        }
    }
    
    echo 
'Before combine:  (I want to the result like this)<br />';
    for(
$i=0$i<count($support); $i++){
        echo 
$support[$i],'-',$items[$i];
        echo 
'<br />';
    }
    
    
$itemset1 array_combine($items$support);
    echo 
'<br />';
    
    echo 
'After combine: <br />';    
    while(list(
$key$value)=each($itemset1)){
        echo 
$key,'-',$value;
        echo 
'<br />';
    }
?>
Before combine (I want to the result like this):
A-2
B-3
C-3
D-1
E-3

After combine:
A-2
B-3
C-1
D-3
E-3
Please help me! Thank a lot!