I can say for sure that current trends show an increasing demand for PHP developers, especially in the context of web development. Your choice between PHP and Ruby depends on the specific needs of your business and your current project. On the IT staffing agency page
https://talmatic.com/blog/trends/php-vs-ruby-which-developers-are-more-in-demand/ you can find information that PHP is more common lately and may be preferred for projects with wide usage, but Ruby may be more suitable for more specific tasks. To understand this issue in more detail, I recommend that you contact Talmatic specialists for a consultation.