Question

上下文：

我正在使用以下堆栈：HTML / CSS，PHP，MySQL和XAMPP，以构建一个Web应用程序，该应用程序存储和检索输入到表单的数据。

问题：

我有两个文件（i） export.php 和（ii） export_index.php 。从下面的图片中可以看到， export_index.php 文件为数据建立索引，当在Web浏览器中本地查看时，它是MySQL数据库中数据的完整表示。 export.php 文件应该将您在 export_index.php 文件中看到的完全相同的内容输出到本地下载文件夹中，并输出到 .csv 格式化文件以便在Excel中轻松打开。

在阅读了文档并尝试对其进行调试之后，我仍然无法弄清错误在哪里，但是我认为该错误来自$data[]和$row中的一个/两个。感谢我在此错误上可以获得的任何帮助。谢谢您的宝贵时间！

图片：

index_export.php文件的输出

export.php文件的输出

代码：

index_export.php

<?php
ob_start();

/*
* this file is used to index the data stored in 
* the MySQL database. it will display the data
* on the screen that is in the db but DOESNT
* format the data for excel files. export.php
* does that.
*/


// dn login credentials
include("dbconfig.php");


// connect with credentials held in dbconfig file
$con = new mysqli($server, $user, $pass, $db);


if ($con->connect_error) {
    die("Connection failed: " . $con->connect_error);
} 


session_start();



// List Data
$query = "SELECT * FROM comp";
if (!$result = mysqli_query($con, $query)) {
    exit(mysqli_error($con));
}


if (mysqli_num_rows($result) > 0) {
    $data = '<table class="table table-bordered">
        <tr>
            <th>Title</th>
            <th>Overview</th>
            <th>Threat Details</th>
            <th>Customer Name</th>
            <th>Field Insight</th>
            <th>Competitor</th>
            <th>ID</th>
            <th>Revenue Damage</th>
            <th>Technology</th>
            <th>Geography</th>
        </tr>
    ';
    while ($row = mysqli_fetch_assoc($result)) {
        $data .= '<tr>
        <td>'.$row['titleBinded'].'</td>
        <td>'.$row['overviewBinded'].'</td>
            <td>'.$row['threatDetailsBinded'].'</td>
            <td>'.$row['customerNameBinded'].'</td>
            <td>'.$row['fieldInsightBinded'].'</td>
            <td>'.$row['competitorBinded'].'</td>
            <td>'.$row['idBinded'].'</td>
            <td>'.$row['revDamageBinded'].'</td>
            <td>'.$row['techBinded'].'</td>  
            <td>'.$row['geoBinded'].'</td>
        </tr>';
    }
    $data .= '</table>';
}

?>



<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Export Database Data</title>
    <!-- Bootstrap CSS File  -->
    <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
    <!--  Header  -->
    <div class="row">
        <div class="col-md-12">
            <h2>Export Data from MySQL to CSV</h2>
        </div>
    </div>
    <!--  /Header  -->

    <!--  Content   -->
    <div class="form-group">
        <?php echo $data ?>
    </div>
    <div class="form-group">
        <button onclick="Export()" class="btn btn-primary">Export to CSV File</button>
    </div>
    <!--  /Content   -->

    <script>
        function Export()
        {
            var conf = confirm("Export users to CSV?");
            if(conf == true)
            {
                window.open("export.php", '_blank');
            }
        }
    </script>
</div>
</body>
</html>

export.php

<?php
ob_start();


// passes in the login credentials
include("dbconfig.php");

// !!!CAUSED A MEMORY LEAK!!!!
// includes the index file
//include("export.php");


// connect with credentials held in dbconfig file
$con = new mysqli($server, $user, $pass, $db);
if ($con->connect_error) {
    die("Connection failed: " . $con->connect_error);
}


session_start();   


// list all data in the db
$query = "SELECT * FROM comp";
if (!$result = mysqli_query($con, $query)) {
     exit(mysqli_error($con));
}


$data = array();
if (mysqli_num_rows($result) > 0) {

    while ($row = mysqli_fetch_assoc($result)) {
        $data[] = $row;
    }
}


// header labels for the CSV file
header('Content-Type: text/csv; charset=utf-8');

header('Content-Disposition: attachment; filename = comp.csv');

$output = fopen('php://output', 'w');

fputcsv($output, array('Title', 'Overview', 'Threat Details', 'Customer Name', 'Field Insight', 'Competitor', 'ID', 'Revenue Damage', 'Technology', 'Geography') );



// iteratively exports row by row
if (count($comp) > 0) {
    foreach ($data as $row) {
    fputcsv($output, $row);
    }
}

?>

create.sql

drop database if exists comp;
create schema comp;
use comp;

create table comp (
    titleBinded VARCHAR(50),
    overviewBinded VARCHAR(255),
    threatDetailsBinded VARCHAR(255),
    customerNameBinded VARCHAR(30),
    fieldInsightBinded VARCHAR(255),
    competitorBinded VARCHAR(30),
    idBinded INT,
    revDamageBinded INT,
    techBinded VARCHAR(225),
    geoBinded VARCHAR(255),
    PRIMARY KEY (idBinded)
);

Answer 1

您在 export.php 文件中犯了小错误：

// iteratively exports row by row
 if (count($comp) > 0) {
   foreach ($data as $row) {
      fputcsv($output, $row);
   }
 }

在使用上述代码的情况下

if(count($data) > 0)

代替

 if(count($comp) > 0)

祝你好运！

数据尚未通过PHP

1 个答案: