如何在php mongo查询中将unix时间戳转换为mongodb日期

Question

What will be the equivalent mongo php query. $time is filed of document having php unixtimestamp

db.collection.aggregate({$project : { year : {$year : ISODate("$time"*1000)} }})

Answer 1

Take this approach which adds the epoch date to the timestamp in milliseconds via the $add operator (which would be as a result of another $multiply operation on the time field by 1000 seconds) and the result will be the $year part of your date milliseconds since epoch:

db.collection.aggregate([    
    {
        "$project": {
            "year": {
                "$year": {
                    "$add": [ new Date(0), { "$multiply": [ "$time", 1000 ] } ]
                }
            }
         } 
    }
]);

The equivalent PHP syntax would be something like:

$collection->aggregate([
    [
        "$project" => [
            "year" => [
                "$year" => [
                    "$add": [ new MongoDate(0), [ "$multiply": [ "$time", 1000 ] ] ]
                ]
            ]
        ]
    ]
]);

Answer 2

What have you tried so far, are you using the php Mongo library?

Here an example with a timestamp:

$collection = $mongoClient->your_collection->your_type;
$pipeline = [
    [
        '$project' => [
            'year' => [
                '$year' => new \MongoDate($timestamp)
            ],
        ],
    ],
];

$results = $collection->aggregate($pipeline);