mongodb如何选择自定义字段查询?类似于mysql的select 字段 from
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通过projection来获取自己想要的字段,设为1表示获取,0表示不获取,代码如下:
<?php $key = "bfw"; $manager = new MongoDB\Driver\Manager("mongodb://localhost:27017"); $filter =[]; //通过projecttion来获取自己想要的字段,设为1表示获取,0表示不获取 $options = array("projection" => array("name" => 1)); $query = new MongoDB\Driver\Query($filter, $options); $cursor = $manager->executeQuery("test.bfw", $query); foreach ($cursor as $document) { var_dump($document); }