``` <?php //设置编码格式 header("Content-type:application/json;charset=utf-8"); //打印编码后的json字符串 $response = array( 'code' => 200, 'message' => '请求成功', 'data' => '我是data' ); $arr = array( array('sv_id'=>1,'mid_id'=>1,'sv_question'=>20), array('sv_id'=>2,'mid_id'=>2,'sv_question'=>10), array('sv_id'=>3,'mid_id'=>1,'sv_question'=>20), array('sv_id'=>4,'mid_id'=>3,'sv_question'=>20), array('sv_id'=>5,'mid_id'=>2,'sv_question'=>20), ); $json = json_encode($arr); echo $json; ?> ```