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<?php $input = [ 'a.b.c.d = 1', 'a.b.c.e = Joey', 'a.b.c.f = Smith', 'a.b.g.d = 2', 'a.b.g.e = Chris', 'a.b.g.f = Divner' ]; $data = []; $cleanKeys = []; foreach($input as $record) { $equals = strrpos($record, '='); $value = trim(substr($record, $equals+1)); $key = trim(substr($record, 0, $equals)); $lastDot = strrpos($key, '.'); $appKey = substr($key, $lastDot+1); $curKey = substr($key, 0, $lastDot); $data[$curKey][$appKey] = $value; if (strpos($curKey, '.') !== FALSE) { $cleanKeys[] = $curKey; } } foreach($data as $k => $v){ $keys = explode('.', $k); $firstKey = array_shift($keys); $newData = []; while($key = array_pop($keys)) { if (count($newData) === 0) { $newData[$key] = $v; } else { $newData = [$key => $newData]; } } $data = array_merge_recursive($data, $newData); unset($data[$k]); } echo var_export($data);

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