How to Modify a Configuration File String Using PHP Form Data?

Reading and Writing Configuration Files

Question:

How can one modify a string in a configuration file using data from a PHP form ($_POST variable)?

Answer:

Consider using a structured file format like CSV, Ini, XML, JSON, or YAML. Utilize dedicated APIs to read and write these formats.

Alternative Approaches:

• Array Storage: Store the configuration in an array and use serialize/unserialize or var_export/include to persist it.
• Custom Class: Implement a class that encapsulates read/write operations for a custom configuration format.

Example:

A basic PHP class for managing configuration files:

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:

// Write to config file
MyConfig::write('conf1.txt', ['setting_1' => 'foo']);

// Read and modify config in-memory
$config = MyConfig::read('conf1.txt');
$config['setting_1'] = 'bar';
$config['setting_2'] = 'baz';

// Update config file with modified values
MyConfig::write('conf1.txt', $config);

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