How can PHP scripts be updated without overwriting user-made changes?

When updating PHP scripts without overwriting user-made changes, it is essential to separate user-specific configurations or customizations from the core script. One common approach is to use configuration files or database settings to store user-specific data that can be easily updated without affecting the core script. By keeping user-made changes separate from the core script, updates can be applied smoothly without the risk of overwriting important customizations.

// Example of separating user-specific configurations in a PHP script

// Core script logic
$coreSetting = "Core setting value";

// User-specific configurations
$userSetting = "User setting value";

// User-specific configurations stored in a separate file or database
// config.php
$userSetting = "User setting value";

// When updating the core script, only modify the core logic
$coreSetting = "Updated core setting value";