There are many benefits of using a PHP framework for laravel development companies, such as CodeIgniter. Some of these benefits include:

- improved performance: using a framework can help to improve the performance of your website or application by providing a structure that encourages efficient coding practices;

- reduced development time: a well-designed framework can help to save you time during the development process by providing a range of built-in features and functionality;

- increased security: a framework can help to improve the security of your website or application by providing a range of security features and tools;

- easier maintenance: using a framework can make it easier to maintain your website or application over time by providing a consistent structure and set of conventions.

There are also some negatives associated with using a PHP framework, such as:

- increased complexity: using a framework can make your website or application more complex, and therefore more difficult to develop and maintain;

- inflexibility: a framework can sometimes be inflexible, and may not allow you to easily customize or change the way your website or application works;

- vendor lock-in: using a framework can sometimes result in 'vendor lock-in', whereby you become reliant on the framework provider for support and updates.