How to Replace Configuration File Strings with $_POST Variables in PHP?

Replacing Configuration File Strings with $_POST Variables

When modifying configuration files for different device types, it is ideal to keep the configuration data separate from the PHP code. This allows for easy maintenance and version control. However, replacing specific strings in the configuration files with variables from $_POST can be challenging.

One suggested approach is to utilize structured file formats such as CSV, Ini, XML, JSON, or YAML. Employing appropriate APIs can simplify the reading and writing processes for these formats.

If structured file formats are not feasible, consider storing the configuration in an array and leveraging serialize/unserialize or var_export/include to manipulate it.

Example Class:

Here is a basic example class for reading and writing configuration using var_export/include:

class MyConfig
{
    public static function read($filename)
    {
        $config = include $filename;
        return $config;
    }

    public static function write($filename, array $config)
    {
        $config = var_export($config, true);
        file_put_contents($filename, "<?php return $config ;");
    }
}

Usage:

This class can be used as follows:

MyConfig::write('conf1.txt', array( 'setting_1' => 'foo' ));
$config = MyConfig::read('conf1.txt');
$config['setting_1'] = 'bar';
$config['setting_2'] = 'baz';
MyConfig::write('conf1.txt', $config);

By utilizing this method, string replacements can be easily performed before rendering the configuration file contents to a web page.

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