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<?php print_r(json_decode('{ "$and": [ { "groupId": "528cd99874c193fe070000fb" }, { "$or": [ { "startDate": null }, { "startDate": { "$lt": "2014-03-11T00:00:00+01:00" } } ] }, { "$or": [ { "endDate": null }, { "endDate": { "$gt": "2014-03-11T00:00:00+01:00" } } ] } ] }'), true);

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