class bukan array

<?php


public function showDataIndustri()
    {
        $result = $this->auth_model->showDataIndustri();
        $dataindustri = [];
        $dataindustri['data'] = [];
/*
        $buttons = array('<input
                    type="button"
                    class="btn btn-default"
                    onclick="('.$value['kode_industri'].')"
                    >Edit ');
*/
//==============class mass bukan array
        $buttons = array('<input
                    type="button"
                    class="btn btn-default"
                    onclick="('.$value->kode_industri .')"
                    >Edit ');
        foreach($result as $index => $value) {
            $dataindustri['data'][$index] = array (
                $value->nama_industri,
                $value->alamat_industri,
                $value->telepon_industri,
                $value->jurusan,
                $buttons
            );
        };

        echo json_encode($dataindustri);
    }