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<?php function extract_holidays($employee /* Array */, $new_holidays /* Array */) { $new_holidays[] = [ "name" => $employee["firstname"].' '.$employee["lastname"], "startDate" => '2014-01-01', "endDate" => '2014-01-07' ]; } $response = json_decode('[{"firstname":"system","lastname":"system","id_employee":"24040","schedule":{"2014-07-01":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-02":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-03":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-04":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-05":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-06":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]},"2014-07-07":{"text":"OFF","id_event":"22","event_name":"off","color":"AAAAAA","is_work":false,"details":[]}}},{"firstname":"amira","lastname":"turki","id_employee":"28472","schedule":{"2014-07-01":{"text":"7h30-17h","id_event":"1","event_name":"planifi\u00e9","color":"FFFFFF","is_work":true,"details":[{"event_name":"planifi\u00e9","id_event":"1","is_work":"1","start":1404192600,"end":1404226800}]},"2014-07-02":{"text":"7h30-17h","id_event":"1","event_name":"planifi\u00e9","color":"FFFFFF","is_work":true,"details":[{"event_name":"planifi\u00e9","id_event":"1","is_work":"1","start":1404279000,"end":1404313200}]},"2014-07-03":{"text":"7h30-17h","id_event":"1","event_name":"planifi\u00e9","color":"FFFFFF","is_work":true,"details":[{"event_name":"planifi\u00e9","id_event":"1","is_work":"1","start":1404365400,"end":1404399600}]},"2014-07-04":{"text":"7h30-17h","id_event":"1","event_name":"planifi\u00e9","color":"FFFFFF","is_work":true,"details":[{"event_name":"planifi\u00e9","id_event":"1","is_work":"1","start":1404451800,"end":1404486000}]},"2014-07-05":{"text":"REPOS","id_event":"20","event_name":"repos","color":"FFFFAA","is_work":false,"details":[]},"2014-07-06":{"text":"REPOS","id_event":"20","event_name":"repos","color":"FFFFAA","is_work":false,"details":[]},"2014-07-07":{"text":"7h30-17h","id_event":"1","event_name":"planifi\u00e9","color":"FFFFFF","is_work":true,"details":[{"event_name":"planifi\u00e9","id_event":"1","is_work":"1","start":1404711000,"end":1404745200}]}}}]',true); var_dump($response); $new_holidays = []; foreach($response as $employee) { extract_holidays($employee, $new_holidays); } var_dump($new_holidays); // echo json_encode($new_holidays,true);