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<?php $json1 = '{"data": [{"category": "Games","id": "45345"}, {"category": "Music","id": "345345345"}, {"category": "Food","id": "1"}, {"category": "Pets","id": "13245345"}],"paging": {"next": "https://graph.facebook.com/1161990140/likes?limit=2&offset=2&__after_id=118243704898877"}}'; $json2 = '{"data": {"something": "blah","posts": [{"id": "34241","title": "orange"}],"items": [{"id": "1","name": "orange"},{"id": "2","name": "dog"},{"id": "3","name": "cat"},{"id": "4","name": "apple"}]}}'; $array1 = json_decode($json1, true); $array2 = json_decode($json2, true); $ids = array_map(function($value) { return $value['id']; }, $array2['data']['items']); $new = array_filter($array1['data'], function($var) use ($ids) { return !in_array($var['id'], $ids); }); var_dump($new);

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