Javascript将PHP Json转换为javascript数组

问题描述

大家好，

让我们说清楚。在php中我使用了json_encode（...），然后在javascript中得到了值，看起来如下：

lets make this very clear. In php i used json_encode(...) and then got the value in javascript, looks as the following:

["float","float","float","float"]  // PS: This is a string...

我想把它变成一个普通的javascript数组，如下所示：

And i would like to make this into a normal javascript array, like so:

Arr[0] // Will be float
Arr[1] // Will be float
Arr[2] // Will be float
Arr[3] // Will be float

现在我问你，这怎么可能？

And now I'm asking you, how is this possible?

谢谢你

推荐答案

听起来你在JavaScript中检索一个JSON字符串（也许是通过AJAX？）。如果你需要将它变成一个实际的数组值，你可能想要使用 JSON.parse（）。

It sounds like you're retrieving a JSON string in JavaScript (perhaps via AJAX?). If you need to make this into an actual array value, you'd probably want to use JSON.parse().

var retrievedJSON = '["float","float","float","float"]'; // normally from AJAX
var myArray = JSON.parse(retrievedJSON);

如果你实际上是在页面中写出一个值，而不是使用AJAX，那么你应该能够直接回显 json_encode 的输出而不引用; JSON本身就是有效的JavaScript。

If you're actually writing out a value into the page, rather than using AJAX, then you should be able to simply echo the output of json_encode directly, without quoting; JSON itself is valid JavaScript.

var myArray = <?php echo json_encode($myPhpArray); ?>;

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