Rename mongo database - php

Question

I am doing project using mongodb and php. so here I tried to rename existing database using php. so I did following way to rename database.
first I create new database( user new database name)
read all records from old db and insert to new db
then I drop old db
this is my code.
$conn = new \MongoClient('mongodb://example.com:27017', array("connect" => TRUE));
$exist_dbs = $conn->listDBs();
foreach ($exist_dbs["databases"] as $databse) {
if ($databse['name'] == $new_name) {
$new_name_is_exist = true;
}
}
if (!$new_name_is_exist) {
$db = new \MongoDB($conn, $old_name);
//create new database
$db_new = new \MongoDB($conn, $new_name);
$collections = $db->getCollectionNames();
foreach ($collections as $collection) {
//create collection
$new_collection = new \MongoCollection($db_new, $collection);
$mongo_collection = $db->$collection;
$objects = $mongo_collection->find();
while ($document = $objects->getNext()) {
//add records
$new_collection->insert($document);
}
}
$db->drop();
$msg = 'database renamed';
} else {
$msg = 'given database name already exist';
}
$conn->close();
it works fine. but I would like to know is there any better way to rename mongo database using php?

Answer 1

Copy db (php + mongodb):
<?php
$rename = 'oldname';
$name = 'newname';
$mongo = (new MongoClient());
$db = $mongo->admin;
$response = $db->command(array(
'copydb' => 1,
'fromhost' => 'localhost',
'fromdb' => $rename,
'todb' => $name
));
print_r($response);
Drop db (php + mongodb):
<?php
$name = 'oldname';
$mongo = (new MongoClient());
$db = $mongo->$name;
$response = $db->command(array(
'dropDatabase' => 1
));
print_r($response);

Answer 2

$db=new new Mongo();
Copy old_db to new_db
$responseCopy = $db->admin->command(array(
'copydb' => 1,
'fromhost' => 'localhost',
'fromdb' => 'old_db',
'todb' =>'new_db'
));
Now drop old_db
if($responseCopy['ok']==1){
$responseDrop=$db->old_db->command(array('dropDatabase' => 1));
//OR
$responseDrop =$db->old_db->drop();
}
Show Output
print_r($responseCopy);
print_r($responseDrop);
Output will be something like this
Array ( [ok] => 1 )
Array ( [dropped] => old_db [ok] => 1 )

Answer 3

you can use this
$mongo = new MongoClient('_MONGODB_HOST_URL_');
$query = array("renameCollection" => "Database.OldName", "to" => "Database.NewName", "dropTarget" => "true");
$mongo->admin->command($query);