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我正在尝试通过创建股票投资组合来学习 php 和 javascript。我想要做的是自动更新表格的价格单元格，而无需使用 javascript 刷新页面。我创建了一个新的 php 文件，仅将那个价格字段添加到投资组合中，但我似乎无法让它工作。我在那个价格字段上有很多错误。我已将所有文件都放在这里pastebin。任何帮助，将不胜感激。 在此处输入图像描述

portfolio.php file

<table class="table table-hover center-table table-bordered">
        <tr>
        <th>Symbol</th>
        <th>Name</th>
        <th>Shares</th>
        <th>Price</th>
        <th>Total</th>
        </tr>
<?php foreach ($shares as $row): ?>

        <tr>
        <td><?= $row["symbol"]?></td>
        <td><?= $row["name"]?></td>
        <td><?= $row["shares"]?></td>

        <td id="price">$<?= number_format($row["price"],2)?></td>

        <td>$<?= number_format($row["total"],2)?></td>
        </tr>

<? endforeach ?>



<tr>
    <td>CASH</td>
    <td></td>
    <td></td>
    <td></td>
    <td>$<?= number_format($cash[0]["cash"], 2)?></td>

</tr>

</table>

<script type="text/javascript" src="js/update.js" ></script>

index.php 文件

<?php

// configuration
require("../includes/config.php");

//query user's portfolio

$rows = query("SELECT * FROM shares WHERE id = ?", $_SESSION["id"]);
$cash = query("SELECT cash FROM users WHERE id = ?", $_SESSION["id"]);

    //create array to store the shares
    $shares = [];

    //for each of the user info

    foreach($rows as $row){

        //lookup stock info
        $stock = lookup($row["symbol"]);


        if($stock !== false){

            $shares[] = [
                "name" => $stock["name"],
                "price" => $stock["price"],
                "shares" => $row["shares"],
                "symbol" => $row["symbol"],
                "total" => $row["shares"]*$stock["price"]

            ];
                 //dump($shares);      
        }

    }

// render portfolio
render("portfolio.php", ["shares" => $shares,"cash" => $cash, "title" => "Portfolio"] );  
?>

更新.php

<?php

require("../includes/functions.php"); 
require("../includes/config_update.php");

$rows = query("SELECT * FROM shares WHERE id = ?", $_SESSION["id"]);
$cash = query("SELECT cash FROM users WHERE id = ?", $_SESSION["id"]);
        //create array to store the shares
    $shares = [];

    //for each of the user info

    foreach($rows as $row){

        $stock = lookup($row["symbol"]);

        if($stock !== false){

            $shares[] = [

                "name" => $stock["name"],
                "price" => $stock["price"],
                "shares" => $row["shares"],
                "symbol" => $row["symbol"],
                "total" => $row["shares"]*$stock["price"]
            ];

        }
    }

// render portfolio
render("portfolio.php", ['shares' => $shares, 'cash' => $cash]);  
?>

更新.js

$(document).ready(function(){
    var updater = setTimeout(function(){
        $('#price').load('update.php', 'update=true');
    },6);
});

当我第一次运行它时，我在价格单元格中得到了整个表格以及这些错误消息注意：未定义的变量：portfolio.php 中的股票第 10 行为第 10 行的portfolio.php 中的 foreach() 提供的参数无效未定义的变量兑现第 31 行的投资组合.php

我不再收到任何错误，但现在我在表格的价格字段中获得了整个页面。

4

1 回答 1

1

您在 index.php 中传递了一个参数数组，其中一个具有 key shares，但是在 update.php 中，您试图只传回该数组，在 update.php 中更改它

 render("portfolio.php", $share);

到

render("portfolio.php", ['shares' => $share]);
于 2013-03-27T16:19:26.227 回答