public function fromArray(array $array)
    {
        $root   = new Node(null);
        $map    = array();
        $map[0] = $root;

        // Create an entry in $map for every item in $a
        foreach ($array as $element) {
            if (3 !== count($element)) {
                throw new Exception('Each array must have 3 elements.');
            }

            $map[$element[0]] = new Node($element[2]);
        }

        //
        foreach ($array as $element) {
            if (empty($element[1])) {
                $element[1] = 0;
            }

            $found = false;
            $i     = 0;
            $keys  = array_keys($map);
            $cnt   = count($keys);
            while (!$found && $i < $cnt) {
                if ($keys[$i] === $element[1]) {
                    $map[$keys[$i]]->addChild($map[$element[0]]);
                    $found = true;
                } else {
                    $i++;
                }
            }
            if (!$found) {
                // Error
                throw new Exception('Data structure does not seem to be consistent. '
                        . 'Key "' . $element[1] . '" could not be found.');
            }
        }

        return $root;
    }
public function fromArray(array $array)
    {
        $root   = new Node(null);
        $map    = array();
        $map[0] = $root;

        // Create an entry in $map for every item in $a
        foreach ($array as $element) {
            if (3 !== count($element)) {
                throw new Exception('Each array must have 3 elements.');
            }

            $map[$element[0]] = new Node($element[2]);
        }

        //
        foreach ($array as $element) {
            if (empty($element[1])) {
                $element[1] = 0;
            }

            $found = false;
            $i     = 0;
            $keys  = array_keys($map);
            $cnt   = count($keys);
            while (!$found && $i < $cnt) {
                if ($keys[$i] === $element[1]) {
                    $map[$keys[$i]]->addChild($map[$element[0]]);
                    $found = true;
                } else {
                    $i++;
                }
            }
            if (!$found) {
                // Error
                throw new Exception('Data structure does not seem to be consistent. '
                        . 'Key "' . $element[1] . '" could not be found.');
            }
        }

        return $root;
    }
public function fromArray ( array $ array ) { $ root = new Node ( null ) ; $ map = array ( ) ; $ map [ 0 ] = $ root ; // Create an entry in $map for every item in $a foreach ( $ array as $ element ) { if ( 3 !== count ( $ element ) ) { throw new Exception ( 'Each array must have 3 elements.' ) ; } $ map [ $ element [ 0 ] ] = new Node ( $ element [ 2 ] ) ; } // foreach ( $ array as $ element ) { if ( empty ( $ element [ 1 ] ) ) { $ element [ 1 ] = 0 ; } $ found = false ; $ i = 0 ; $ keys = array_keys ( $ map ) ; $ cnt = count ( $ keys ) ; while ( ! $ found && $ i < $ cnt ) { if ( $ keys [ $ i ] === $ element [ 1 ] ) { $ map [ $ keys [ $ i ] ] -> addChild ( $ map [ $ element [ 0 ] ] ) ; $ found = true ; } else { $ i ++ ; } } if ( ! $ found ) { // Error throw new Exception ( 'Data structure does not seem to be consistent. ' . 'Key "' . $ element [ 1 ] . '" could not be found.' ) ; } } return $ root ; }
Creates a tree structure from an array and returns the root element

$a has to be a list of (key, parent_key, value) triplets. Keys will not
be preserved, they are only used to define the initial tree hierarchy.
The value part may be any kind of object, array or scalar value.

@param  array $array
@return Node Root element
Creates a tree structure from an array and returns the root element