What are some potential security risks when sharing source code for learning purposes in PHP?

One potential security risk when sharing source code for learning purposes in PHP is the exposure of sensitive information such as database credentials or API keys. To mitigate this risk, it is important to remove any hardcoded sensitive information from the code before sharing it publicly. Instead, consider using environment variables or configuration files to store and access this information securely. 

// Example of storing sensitive information in a configuration file
$config = include 'config.php';
```

In the `config.php` file:
```php
return [
    'db_host' => 'localhost',
    'db_name' => 'database_name',
    'db_user' => 'username',
    'db_pass' => 'password'
];

Keywords

SQL injection Cross-site scripting (XSS) Code injection Information leakage Remote code execution

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