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<?php $json = '[ { "key": "2.1", "value": "11", "quantity": "1" }, { "key": "2.1", "value": "22", "quantity": "1" }, { "key": "2.5", "value": "19", "quantity": "1" } ]'; $array = json_decode($json,true); $final = []; foreach($array as $arr){ $final[$arr['key']]['key'] = $arr['key']; $final[$arr['key']]['value'] = (isset($final[$arr['key']]['value'])) ? $final[$arr['key']]['value'].','. $arr['value'] : $arr['value']; $final[$arr['key']]['quantity'] = (isset($final[$arr['key']]['quantity'])) ? $final[$arr['key']]['quantity']+ $arr['quantity'] : $arr['quantity']; } echo $json = json_encode(array_values($final));
Output for git.master, git.master_jit, rfc.property-hooks
[{"key":"2.1","value":"11,22","quantity":2},{"key":"2.5","value":"19","quantity":"1"}]

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