在 PHP 和 Javascript 之间传递数组数据未定义

Question

我有一个关联的 PHP 数组，我需要在 Javascript 中访问它来检查manufacturer. 我目前正在页面上内联输出，然后在单独的 JS 文件中读取。<?php$carsData = array();foreach ($cars as $car) {    $carsData[] = ['id' => $car->id, 'title' => $car->title, 'manufacturer' => $car->manufacturer];}$carsDataString = json_encode($carsData);?><script>carsData = <?php echo $carsDataString . ';';?></script>到目前为止，这有效 - 源代码完全按照我的预期显示：carsData = [{"id":2,"title":"Astra","manufacturer":"2"},{"id":3,"title":"Tepee","manufacturer":"3"},{"id":4,"title":"C4 Grand","manufacturer":"4"},{"id":5,"title":"Civic","manufacturer":"5"},{"id":6,"title":"Jazz","manufacturer":"5"}];到目前为止，在我尝试用 JS 阅读本文的过程中，我有以下内容：        $.each(carsData, function(key, value) {            console.log(key['manufacturer']);        });在我的控制台中，这是输出undefined, undefined, undefined, undefined. 如果我carsData在控制台中执行，我会看到与我期望的完全一样的对象。那么我做错了什么？我需要能够接受这个并执行以下操作：        $.each(carsData, function(key, value) {            if (key['manufacturer'] = 5 {                $('#manufacturer' + key['manufacturer'].show();            }        });请注意，我已将其简化为值“5”，因为该值实际上来自另一个脚本，并且按照我的预期在那里打印 5。

Answer 1

为了使js有效，你需要;在这一行的末尾添加一个

carsData = <?php echo $carsDataString;?>;

Answer 2

试试这个代码

$.each(carsData, function(key, value) { 
           console.log(value['manufacturer']);
        });

Answer 3

<script type="javascript">

carsData = new Array(<?php echo implode(",",$carsDataString);?>);

</script>