将 PHP 变量保存到文本文件
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Save PHP variables to a text file
提问by Aadi
I was wondering how to save PHP variables to a txt file and then retrieve them again.
我想知道如何将 PHP 变量保存到 txt 文件，然后再次检索它们。
Example:
例子：
There is an input box, after submitted the stuff that was written in the input box will be saved to a text file. Later on the results need to be brought back as a variable. So lets say the variable is $text I need that to be saved to a text file and be able to retrieve it back again.
有一个输入框，提交后输入框中写的东西会保存到一个文本文件中。稍后需要将结果作为变量带回来。所以可以说变量是 $text 我需要将其保存到文本文件中并能够再次检索它。
回答by Sandeep Shetty
This should do what you want, but without more context I can't tell for sure.
这应该做你想做的，但没有更多的背景我不能肯定。
Writing $text to a file:
将 $text 写入文件：
$text = "Anything";
$var_str = var_export($text, true);
$var = "<?php\n\n$text = $var_str;\n\n?>";
file_put_contents('filename.php', $var);
Retrieving it again:
再次检索：
include 'filename.php';
echo $text;
回答by Christian
Personally, I'd use file_put_contents and file_get_contents (these are wrappers for fopen, fputs, etc).
就个人而言，我会使用 file_put_contents 和 file_get_contents（这些是 fopen、fputs 等的包装器）。
Also, if you are going to write any structured data, such as arrays, I suggest you serialize and unserialize the files contents.
此外，如果您要写入任何结构化数据，例如数组，我建议您序列化和反序列化文件内容。
$file = '/tmp/file';
$content = serialize($my_variable);
file_put_contents($file, $content);
$content = unserialize(file_get_contents($file));
回答by duckboy81
(Sorry I can't comment just yet, otherwise I would)
（对不起，我现在还不能发表评论，否则我会）
To add to Christian's answer you might consider using json_encodeand json_decodeinstead of serializeand unserializeto keep you safe. See a warning from the PHP man page:
为了增加 Christian 的答案，您可能会考虑使用json_encodeandjson_decode代替serializeandunserialize来保证您的安全。请参阅 PHP 手册页中的警告：
Warning
Do not pass untrusted user input to unserialize(). Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this. Use a safe, standard data interchange format such as JSON (via json_decode() and json_encode()) if you need to pass serialized data to the user.
警告
不要将不受信任的用户输入传递给 unserialize()。由于对象实例化和自动加载，反序列化可能导致代码被加载和执行，恶意用户可能能够利用这一点。如果需要将序列化数据传递给用户，请使用安全、标准的数据交换格式，例如 JSON（通过 json_decode() 和 json_encode()）。
So your final solution might have the following:
因此，您的最终解决方案可能具有以下内容：
$file = '/tmp/file';
$content = json_encode($my_variable);
file_put_contents($file, $content);
$content = json_decode(file_get_contents($file), TRUE);
回答by T.Todua
for_example, you have anyFile.php, and there is written $any_variable='hi Frank';
for_example，你有anyFile.php，并且有写$any_variable='hi Frank';
to change that variable to hi Hyman, use like the following code:
要将该变量更改为hi Hyman，请使用如下代码：
<?php
$content = file_get_contents('anyFile.php');
$new_content = preg_replace('/$any_variable=\"(.*?)\";/', '$any_variable="hi Hyman";', $content);
file_put_contents('anyFile.php', $new_content);
?>
回答by MarcoSpada
Use serialize()on the variable, then save the string to a file. later you will be able to read the serialed var from the file and rebuilt the original var (wether it was a string or an array or an object)
serialize()在变量上使用，然后将字符串保存到文件中。稍后您将能够从文件中读取序列化的 var 并重建原始 var（无论它是字符串、数组还是对象）
回答by Kerry Jones
Use a combination of of fopen, fwriteand fread. PHP.net has excellent documentation and examplesof each of them.
使用fopen,fwrite和的组合fread。PHP.net 有优秀的文档和每个例子。
http://us2.php.net/manual/en/function.fopen.php
http://us2.php.net/manual/en/function.fwrite.php
http://us2.php.net/manual/en/function.fread.php
http://us2.php.net/manual/en/function.fopen.php
http://us2.php.net/manual/en/function.fwrite.php
http://us2.php.net/manual/ zh/function.fread.php
回答by undo
Okay, so I needed a solution to this, and I borrowed heavily from the answers to this question and made a library: https://github.com/rahuldottech/varDx(Licensed under the MIT license).
好的，所以我需要一个解决方案，我从这个问题的答案中大量借鉴并制作了一个库：https: //github.com/rahuldottech/varDx（在 MIT 许可下获得许可）。
It uses serialize()and unserialize()and writes data to a file. It can read and write multiple objects/variables/whatever to and from the same file.
它使用serialize()和unserialize()将数据写入文件。它可以从同一个文件中读取和写入多个对象/变量/任何内容。
Usage:
用法：
<?php
require 'varDx.php';
$dx = new \varDx\cDX; //create an object
$dx->def('file.dat'); //define data file
$val1 = "this is a string";
$dx->write('data1', $val1); //writes key to file
echo $dx->read('data1'); //returns key value from file
See the github page for more information. It has functions to read, write, check, modify and delete data.
有关更多信息，请参阅 github 页面。它具有读取、写入、检查、修改和删除数据的功能。
