If you decide to add an extra added value to your r茅sum茅, you should look into PHP certifications. Many companies appreciate certifications since they can prove you know more but these are still not the guarantee the knowledge can be taken for granted.
For PHP specific field there is currently the following official PHP certification available:
- PHP certification - official PHP certification
There are also framework specific certifications available for different frameworks and libraries available from their official vendors:
- Laravel certification - Certification for Laravel framework
- Magento certification - Magento ecommerce specific certification
- Symfony certification - Symfony framework speficic certification
- Twig certification - Certification for Twig template engine
- Zend Framework certification - Zend Framework 1 and 2 specific certification
They can be taken online and quite a lot of preparation is required for them. In case you decide to take any of the certification exams, make sure you prepare well.