可以使用project进行加工处理,代码如下:
<?php运行结果如下:
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
// 插入数据
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 2, 'name' => 'bfw', 'scores' => 123, 'atime' => time()-1000000]);
$bulk->insert(['x' => 2, 'name' => 'google', 'scores' => 10, 'atime' => time()-200000]);
$bulk->insert(['x' => 2, 'name' => 'baidu', 'scores' => 11, 'atime' => time()-1231123]);
$bulk->insert(['x' => 2, 'name' => 'bfw', 'scores' => 200, 'atime' => time()]);
$bulk->insert(['x' => 2, 'name' => 'bfw', 'scores' => 123, 'atime' => time()]);
$bulk->insert(['x' => 2, 'name' => 'google', 'scores' => 10, 'atime' => time()]);
$bulk->insert(['x' => 2, 'name' => 'baidu', 'scores' => 11, 'atime' => time()]);
$bulk->insert(['x' => 2, 'name' => 'bfw', 'scores' => 200, 'atime' => time()]);
$_data = $manager->executeBulkWrite('test.sites2', $bulk);
$utcdatetime = new MongoDB\BSON\UTCDateTime(0); //1970.01.01 00:00:00
$repair_time = 3600000 * 8; //修复时差
$param = [
'aggregate' => 'sites2', //表名
'pipeline' => [
[
//完整的format格式是%Y-%m-%d %H:%M:%S:%L
'$project' => [
'datetime' => ['$dateToString' => ['format' => "%Y-%m-%d", 'date' => ['$add' => [$utcdatetime, ['$multiply' => ['$atime', 1000]], $repair_time]]]], "x" => '$x'
]],
['$match' => ['x' => 2]],
['$group' => ['_id' => '$datetime', 'count' => ['$sum' => 1]]],
],
'cursor' => new \stdClass()// 高版本需要带上这个值
];
//除了$sum外还有$max最大值 $min最小值 $avg平均值
$command = new \MongoDB\Driver\Command($param);
$cursor = $manager->executeCommand('test', $command);
foreach ($cursor as $document) {
$document = objectToArray($document);
print_r($document);
}
function objectToArray($object) {
$result = array();
$object = is_object($object) ? get_object_vars($object) : $object;
foreach ($object as $key => $val) {
$val = (is_object($val) || is_array($val)) ? objectToArray($val) : $val;
$result[$key] = $val;
}
return $result;
}

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