Question

我只想替换名为＆＃34; config.php＆＃34;的文件中的一些内容。这是我要编辑的文件部分。我想使用表单来设置大写文本的值。我被卡住了，我看着StackOverflow和谷歌。我找不到任何东西。

$dbhost = "DBHOST";                          /*      "localhost"      */
$dbuname = "DBUSERNAME";                     /* "database user name"  */
$dbpass = "DBPASSWORD";                      /* "database password"   */
$dbname = "DBNAME";                          /*    "database name"    */

此外，表格应如何查找？

我有这个..

<form action="edit.php">
        DB Server: <input type="text" name="host" placeholder="localhost"><br>
        DB Username: <input type="text" name="dbuser" placeholder="admin"><br>
        DB Password: <input type="password" name="dbpassword" placeholder="********"><br>
        DB Name: <input type="text" name="db_name" placeholder="pnc"><br>
        <button type="submit">Next Step</button>
</form>

Answer 1

说你有这个文件：

<强> /home/websites/example.com/conf.php

<?php

$dbhost = "DBHOST";                          /*      "localhost"      */
$dbuname = "DBUSERNAME";                     /* "database user name"  */
$dbpass = "DBPASSWORD";                      /* "database password"   */
$dbname = "DBNAME";

要替换这些占位符值，您只需要在变量中获取页面源并执行一些字符串替换，然后将其写回文件。

$confpath = '/home/websites/example.com/conf.php';
$confphp = file_get_contents($confphp);

// Note the POST values need to be CLEANED and validated first.
// This especially means whitelisting what characters are allowed
// in the POST-received variables, encoding and removing " and '.
// You have to be VERY careful to authentic the user, and verify
// that user has permissions to do what they're doing, with the 
// databases/tables they're working with, unless this is part of
// an install script, which would need to be removed immediately
// upon finishing the install.
$confphp = str_replace(
    array('DBHOST','DBUSERNAME','DBPASSWORD','DBNAME'),
    array(
        addslashes($post_cleaned_dbhost), 
        addslashes($post_cleaned_dbusername), 
        addslashes($post_cleaned_dbpassword), 
        addslashes($post_cleaned_db_name)
    ),
    $confphp
);

file_put_contents($confpath, $confphp);

请注意，您要替换的值必须对文件的文本内容是唯一的（例如，同一文件中没有$DBUSERNAME），否则它将替换这些值同样。如果未写入文件，则返回false，因此您可以测试file_put_contents()的返回以验证其是否有效。

http://www.php.net/manual/en/function.file-get-contents.php

http://www.php.net/manual/en/function.file-put-contents.php

Answer 2

您是否要创建一个表单，该表单将接受用户输入并更改文件中的行？我不建议直接从表单设置数据库连接。但如果有必要尝试使用普通格式存储数据，如JSON

 $data = json_decode(file_get_contents($dataFileName));

写

 file_put_contents(json_encode($data, $dataFileName));

供参考检查http://www.php.net//manual/en/book.json.php

如果文件采用典型的数据格式，则会清楚地显示您的文件。您可以将此database.json命名为

创建一个名为database.json的文件，其中包含以下内容：

{
     "username": "...",
     "password": "...",
     "database": "...",
     "host": "..."
}

然后，要阅读此数据，您可以使用

$data = json_decode(file_get_contents('database.json'));
$data['username'] = $newValue;
$username = $data['username'];

设置新值

file_put_contents(json_encode('database.json', $data));

从用户提交的数据连接到数据库时存在问题，例如切换到其他数据库并在页面中显示可用于XSS的恶意数据http://en.wikipedia.org/wiki/Cross-site_scripting

Answer 3

制作带控制器的表格

HTML格式的代码

<form name="dbSet" id="dbSet" action="form_set_db.php" method="POST" />
    <label>Host</label> <input type="text" name="host" id="host" /><br />
    <label>Username</label> <input type="text" name="username" id="username" /><br />
    <label>Password</label> <input type="password" name="password" id="password" /><br />
    <label>Database</label> <input type="database" name="database" id="database" />
</form>

<强> form_set_db.php

require_once 'config.php';
if(isset($_POST["host"], $_POST["username"], $_POST["password"], $_POST["database"]))
{
    $dbhost = $_POST["host"];
    $dbuname = $_POST["username"];
    $dbpass = $_POST["password"];
    $dbname = $_POST["database"];
}

这会将$dbhost $dbuname $dbpass $dbname的值替换为您在表单中输入的值。

修改

请注意，这只会暂时替换它。如果你想要一个永久存储的配置文件（例如，如果你正在构建一个安装程序），我会动态创建config.php文件，而不是从头开始创建它。然后你会在form_set_db.php
中做这样的事情
if(isset($_POST["host"], $_POST["username"], $_POST["password"], $_POST["database"])) { $file = fopen("config.php", "w"); if(!is_resource($file)) { return false; } fwrite($file, "$dbhost = '" . $_POST["host"] . "';\n"); fwrite($file, "$dbuname = '" . $_POST["username"] . "';\n"); fwrite($file, "$dbpass = '" . $_POST["password"] . "';\n"); fwrite($file, "$dbname = '" . $_POST["database"] . "';"); fclose($file); }

使用php文件替换另一个文件中的一行代码

3 个答案: