输出返回与print_r的区别

Question

这是一个代码点火器中的控制器，我在运行函数get_reunits()时遇到了函数marge_orderfun()的问题。当我使用输出中的get_reunits() ( print_r in output，print_r($hotel_data);)运行函数时，我给出了以下输出(这正是我想要的)：

Array (
[0] => Array (
[name] => 11
[price] => 77192276
[extra] => 11
[hotel_id] => 77192276
)
[1] => Array (
[name] => 11
[price] => 77192276
[extra] => 11
[hotel_id] => 77192276
)
) Array (
[0] => Array (
[name] => 666666666
[price] => 15190364
[extra] => 11
[hotel_id] => 15190364
)
[1] => Array (
[name] => 99999
[price] => 15190364
[extra] => 11
[hotel_id] => 15190364
)
[2] => Array (
[name] => 777777
[price] => 15190364
[extra] => 11
[hotel_id] => 15190364
)
[3] => Array (
[name] => 1221
[price] => 15190364
[extra] => 11
[hotel_id] => 15190364
)
) Array (
[0] => Array (
[name] => 666666666
[price] => 11
[extra] => 33
[hotel_id] => 15183965
)
[1] => Array (
[name] => 99999
[price] => 11
[extra] => 33
[hotel_id] => 15183965
)
[2] => Array (
[name] => 777777
[price] => 11
[extra] => 33
[hotel_id] => 15183965
)
[3] => Array (
[name] => 1221
[price] => 11
[extra] => 33
[hotel_id] => 15183965
)
)

当使用from return $hotel_data;进行输出并运行函数marge_orderfun()时，我得到以下输出：

{“重新单位”：{“名称”：“11”，“价格”：“77192276”，“额外”：“11”，"hotel_id":"77192276"}，{“名称”：“11”，“价格”：“77192276”，“额外”：“11”，"hotel_id":"77192276"}}

这是我的控制器：

function get_reunits(){
    //$tourf_id   = $this->input->post('tour_name');
    $tourf_id = '102';
    $query_r = $this->db->order_by('id','desc')->get_where('tour_foreign_residence', array('relation' => $tourf_id));                
    foreach($query_r->result() as $idx=>$val){
        $hotel_id = $val->hotel_id;
        $query = $this->db->get_where('tour_foreign_units', array('hotel_id' => $hotel_id));
        if($query->num_rows() > 0){
            $hotel_data = array();
            foreach ($query->result() as $index=>$row) {
                $hotel_data[] = array(
                    'name' => $row->name,
                    'price' => $row->price,
                    'extra' => $row->extra,
                    'hotel_id' => $row->hotel_id
                );                            
            }
        }else{
                return 0;
        }
        //print_r($hotel_data);
        return $hotel_data;
    }
}
function marge_orderfun(){
    //$guide = array('guide' => $this->get_gr());
    //$residence = array('residence' => $this->get_residence());
    $reunits = array('reunits' => $this->get_reunits());
    echo json_encode(array_merge(/*$guide, $residence,*/$reunits));
}

如何将marge_orderfun()中的输出作为get_reunits()中的print_r中的输出

Answer 1

实际上，你输出的是两种不同的东西。print_r正在以可读的格式转储PHP数组的结构/内容。您的marge_orderfun正在转储一串恰好是JSON格式的文本。这个json字符串过去是一个PHP数组，但现在它只是一个文本块。

Answer 2

也许这段代码有助于：

$a = array();
$b = print_r($a, true);
echo $b;