To select a database, use:
<span style="font-size:14px;"><?php $connection = new MongoClient(); $db = $connection->dbname; ?></span>
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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The above introduces how to obtain a mongodb instance in PHP 56, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.
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