How can I dynamically replace strings in configuration files with PHP variables?

Replacing Strings in Configuration Files with PHP Variables

When creating scripts that generate configuration for devices, it's essential to store configurations in separate files for easy modification. However, to dynamically adjust strings in these configurations before displaying them in the browser, you may need to replace specific strings with variables retrieved from forms.

Recommended Approach: Structured Configuration Format

To facilitate this process, consider using structured file formats like CSV, INI, XML, JSON, or YAML. Each format provides APIs that enable easy reading and writing of configurations.

Alternative Approach: Array Storage

Another approach involves storing the configuration in an array. You can then use serialize/unserialize or var_export/include to read and write the array to/from a file.

Example Implementation

Below is a basic example implementation using the array storage approach:

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

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

This approach allows you to easily modify the configuration by replacing strings with PHP variables.

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