php 56 get mongodb instance

To select a database, use:

<span style="font-size:14px;"><?php $connection = new MongoClient();
$db = $connection->dbname;
?></span>

This database does not need to be built in advance, it will be created automatically when you use it.

Please note that if you accidentally create a new database, strange errors may occur. Such as the following example:

<span style="font-size:14px;"><?php $connection = new MongoClient();

$db = $connection->mybiglongdbname;
// do some stuff

$db = $connection->mybiglongdbanme;
// now connected to a different database! 注意此时选择了另一个数据库！
?></span>

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