How can I build a nested HTML list with an infinite depth from a flat array?

Question

I\'m trying to produce a multi-level HTML list from a source array that is formatted like this:

/**
 * id = unique id
 * parent_id = \"id\" that this item is         


        

Answer 1

Print:

function printListRecursive(&$list,$parent=0){
    $foundSome = false;
    for( $i=0,$c=count($list);$i<$c;$i++ ){
        if( $list[$i]['parent_id']==$parent ){
            if( $foundSome==false ){
                echo '
';
                $foundSome = true;
            }
            echo '
'.$list[$i]['text'].'
';
            printListRecursive($list,$list[$i]['id']);
        }
    }
    if( $foundSome ){
        echo '
';
    }
}

printListRecursive($list);

Create multidimensional array:

function makeListRecursive(&$list,$parent=0){
    $result = array();
    for( $i=0,$c=count($list);$i<$c;$i++ ){
        if( $list[$i]['parent_id']==$parent ){
            $list[$i]['childs'] = makeListRecursive($list,$list[$i]['id']);
            $result[] = $list[$i];
        }
    }
    return $result;
}

$result = array();
$result = makeListRecursive($list);
echo '
';
var_dump($result);
echo '
';