Cloning subtree of graph in PHP

index.php

<?php

$clearQuery = 'MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE r,n';

$setupQuery = "CREATE (root:Root) 
CREATE (n1:Child {id:'left1'})-[:CHILD_OF]->(root)
CREATE (n2:Child {id:'right1'})-[:CHILD_OF]->(root)
CREATE (n3:Child {id:'left2'})-[:CHILD_OF]->(n1)
CREATE (n4:Child {id:'left3'})-[:CHILD_OF]->(n3)";

$client->sendCypherQuery($clearQuery);

$client->sendCypherQuery($setupQuery);

$matchQuery = "MATCH (n:Child {id:'left1'})<-[r:CHILD_OF*]-(children), (n2:Child {id:'right1'}) RETURN n, n2, r, children";

$results = $client->sendCypherQuery($matchQuery, array(), null, array('row', 'graph'));

$result = json_decode($results, true);

$left1NodeID = null;
$right1NodeID = null;
$nodes = array();
$newIds = array();
$rels = array();
$cloneQuery = '';
$parameters = array();

foreach ($result['results'][0]['data'] as $id => $incr) {
	foreach ($incr['graph']['nodes'] as $node) {
		$nodes[] = $node;
	}
	foreach ($incr['graph']['relationships'] as $rel) {
		$rels[] = $rel;
	}
}

foreach ($nodes as $node) {
	// Skip Left1 node as it is already created, but get the left1 node internal id for modifying relationship
	// Assign also new identifiers for (nxxx:Child) so we can refert to them for creating relationships
	if ($node['properties']['id'] === 'left1' || $node['properties']['id'] === 'right1') {
		if (null === $left1NodeID && $node['properties']['id'] === 'left1') {
			$left1NodeID = $node['id'];
			$newIds[$left1NodeID] = 'n'.uniqid();
		} elseif (null === $left1NodeID && $node['properties']['id'] === 'right1') {
			$right1NodeID = $node['properties']['id'];
		}
	} else {
		if (isset($parameters['props'.$node['id']])) {
			continue;
		}
		$newIds[$node['id']] = 'n'.uniqid();
		$labels = !empty($node['labels']) ? ':'.implode(':', $node['labels']) : null;
		$parameters['props'.$node['id']] = $node['properties'];
		$cloneQuery .= 'CREATE ('.$newIds[$node['id']].$labels.' {props'.$node['id'].'})';
	}
}

foreach ($rels as $rel) {
	$labels = isset($rel['type']) ? ':'.$rel['type'] : null;
	$cloneQuery .= 'MERGE ('.$newIds[$rel['startNode']].')-['.$labels.']->('.$newIds[$rel['endNode']].')';
}

$endQuery = 'MATCH ('.$newIds[$left1NodeID].':Child {id:\'right1\'}) ' . $cloneQuery;
$newResult = $client->sendCypherQuery($endQuery, $parameters);