Suppose there is such a set
<code>{ "_id" : ObjectId("5022518d09248743250688e0"), "name" : "big fruit", "fruits" : [ "apple", "pear", "orange" ] } ，
{ "_id" : ObjectId("502251a309248743250688e1"), "name" : "good fruit", "fruits" : [ "banana", "pear", "orange" ] } ，
{ "_id" : ObjectId("502251c109248743250688e2"), "name" : "good fruit", "fruits" : [ "banana", "apple", "tomato" ] } </code>
Suppose there is such a set
RT How to write two sentences of code in PHP
<code>db.coll.find({_id:{$in[ ObjectId("502251a309248743250688e1"), ObjectId("502251c109248743250688e2")]}})</code>
Query an array of length three
<code>db.coll.find({fruits:{$size：0}})</code>
How to implement it using PHP
Reply content:
Suppose there is such a set
<code>{ "_id" : ObjectId("5022518d09248743250688e0"), "name" : "big fruit", "fruits" : [ "apple", "pear", "orange" ] } ，
{ "_id" : ObjectId("502251a309248743250688e1"), "name" : "good fruit", "fruits" : [ "banana", "pear", "orange" ] } ，
{ "_id" : ObjectId("502251c109248743250688e2"), "name" : "good fruit", "fruits" : [ "banana", "apple", "tomato" ] } </code>
Suppose there is such a set
RT How to write two sentences of code in PHP
<code>db.coll.find({_id:{$in[ ObjectId("502251a309248743250688e1"), ObjectId("502251c109248743250688e2")]}})</code>
Query an array of length three
<code>db.coll.find({fruits:{$size：0}})</code>
How to implement it using PHP
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