将多维数组从 PHP 传递到 JavaScript

Question

我正在尝试将我的多维数组从 php 传递到 javascript，

$settingsArray = array('genSettings' => array(), 'settings' => array());

$settingsArray['genSettings'] = array(
    "userName" => array("error" => false, "msg"=> ""),
    "email" => array("error" => false, "msg"=> ""),
    "firstName" => array("error" => false, "msg"=> ""),
    "lastName" => array("error" => false, "msg"=> ""),
    "style" => array("error" => false, "msg"=> ""),
    "pwd" => array("error" => false, "msg"=> "")
);


<script  type="text/javascript">
    var settings = JSON.parse(JSON.stringify(<?php echo json_encode($settingsArray) ?>));
    alert(settings); 
    alert(settings.genSettings);
    alert(settings['genSettings']); 
</script>

输出是所有警报返回 [object Object]

我尝试了以下方法：

var settings = JSON.parse(<?php echo json_encode($settingsArray) ?>); 返回 SyntaxError: Unexpected token o in JSON at position 1 -> [对象对象]

var settings = <?php echo json_encode($settingsArray) ?>; 全部 返回 [object 对象]

使用 JSON.stringify

var settings= JSON.stringify(<?php echo json_encode($settingsArray) ?>);
alert(settings); 
alert(settings.genSettings);
alert(settings['genSettings']);

第一个警报返回：

{"genSettings":{"userName":{"error":false,"msg":""},"email":{"error":false,"msg":""},"firstName":{"error":false,"msg":""},"lastName":{"error":false,"msg":""},"style":{"error":false,"msg":""},"pwd":{"error":false,"msg":""}},"settings":[]} 

虽然其余的返回未定义，但我仍然无法在 JavaScript 中获取单个值 settingsArray.genSettings.userName 或 settingsArray['genSettings']['userName'] 等等。正如我第一次尝试看到的那样，我 JSON.parse JSON.stringify(<?php echo json_encode($settingsArray)?>) 并返回 [object Object]。

有谁知道我在 javascript 中做错了什么。提前谢谢！

Answer 1

要打印整个对象，请仅使用stringify。要在其中打印其他内容，请重新解析 JSON 并将您需要打印的内容字符串化：

var settings = JSON.stringify(<?php echo json_encode($settingsArray) ?>);
alert(settings); 

settings = JSON.parse(settings); // Required to access objects inside

alert(JSON.stringify(settings.genSettings)); // Stringify what you access to read it
alert(JSON.stringify(settings['genSettings']));