javascript - 使用 javascript 或 php 从 json 数组获取值

Question

这个问题已经有答案了:

Find object by id in an array of JavaScript objects (36 个回答)

已关闭 8 年前。

这是我的代码:

var newval =[{"new_id":"1","new_no":"1","total":"N.A"},{"new_id":"2","new_no":"3","total":"4"},{"new_id":"2","new_no":"4","total":"5"}];

如何使用 javascript 或 php 从该 json 值获取基于 new_no 值的详细信息。

  function passfun(new_no)
  {
    alert(newval[0].plot_no);
  }

我尝试了这样的操作，但它基于 json 数组值工作，我没有根据 new_no 获得准确的值

Answer 1

您有一个 JSON 格式的对象数组。在 PHP 中，您可以使用以下代码:

PHP:

<?php
$json = '[{"new_id":"1","new_no":"1","total":"N.A"},{"new_id":"2","new_no":"3","total":"4"},{"new_id":"2","new_no":"4","total":"5"}]';

$data = json_decode($json);

function get_prop($object, $name)
{
    return $object->{$name};

}


print get_prop($data[0], 'new_no')."\n";
print get_prop($data[0], 'new_id')."\n";

JavaScript:

var newval =[{"new_id":"1","new_no":"1","total":"N.A"},
             {"new_id":"2","new_no":"3","total":"4"},
             {"new_id":"2","new_no":"4","total":"5"}];

function get_prop(obj, name)
{
    return obj[name];
}

alert(get_prop(newval[0], 'new_no'));