尝试使用JQuery从PHP JSON多维数组中获取数据的问题

问题描述：

I have a multidimensional array which, when echoed in PHP, looks like this:

{
    "11-12-20":{"visits":0,"pageviews":0}
    "11-12-21":{"visits":0,"pageviews":0}
    "11-12-22":{"visits":0,"pageviews":0}
}// etc.

As you can see, the date is the key to the arrays inside the multidimensional array. So I can select an array from the multidimensional array using the date as the key:

$my_multi_array['12-12-12'];

JSON:

$.getJSON('file.php', function(data){
    var test='11-12-29';
    document.write(data.test);
});

When I test that in a browser, nothing is printed on the screen. Also, how would I go about looping through the whole of that array in jQuery and use the data inside that array's array.

I've been at this for hours now, and am pretty frustrated.

我有一个多维数组，当在PHP中回显时，它看起来像这样： p>

  {
“11-12-20”：{“visits”：0，“pageviews”：0} 
“11-12-21”：{“visits”：0，“pageviews”  ：0} 
“11-12-22”：{“visits”：0，“网页浏览量”：0} 
} //等等
  code>  pre> 
 
  如您所见，日期是多维数组中数组的关键。 所以我可以使用日期作为键从多维数组中选择一个数组： p> 
 
 
  $ my_multi_array ['12 -12-12']; 
  code> 

JSON:
nn$.getJSON('file.php'，function（data）{
 var test = '11 -12  -29'; 
 document.write（data.test）; 
}）; 
  code>  pre> 
 
 当我在浏览器中测试时，没有任何内容打印在 屏幕。 另外，我如何在jQuery中循环遍历整个数组并使用该数组的数组中的数据。 p> 
 
 
我已经在这里工作了好几个小时了，我很沮丧 。 p> 
  div>

答

The PHP output that you have echoed is not an array, it's a JSON object without comma separators, which means it's not correctly formed.

If you correct the syntax, you can access the objects in data through the index notation ([]), not the dot operator (.). So instead of accessing data like data.test, you should try data[test].

Assuming you name your JSON object myJson, here's how you can iterate thought it:

var myJson = {
    "11-12-20":{"visits":0,"pageviews":0},
    "11-12-21":{"visits":0,"pageviews":0},
    "11-12-22":{"visits":0,"pageviews":0}
}

for (var item in myJson)
{
    alert(myJson[item].visits + ", " + myJson[item].pageviews);
}

答

Use data[test]. Your data.test is equal to data["test"], and there is no "test" property in your object.

尝试使用JQuery从PHP JSON多维数组中获取数据的问题

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