According to W3Tech data, more than 70% of the websites that use server side programming languages are actually using PHP. It is fair to say that about 8 out of every 10 websites are powered by PHP. So, the answer to your question is “yes”.
All leading companies use PHP to develop new web based projects. PHP does not just mean procedural programming. Decades of evolution have enabled PHP to build a complete ecosystem. You might be aware that many popular frameworks and CMS use PHP language as a compiler.
Popular frameworks such as CodeIgniter or Laravel and CMS such as WordPress are in fact completely dependent on PHP. Undoubtedly, PHP is the most common programming language. It continues to have widespread popularity mainly due to its simplicity. PHP is easier to master than other languages. You will find a lot of resources in PHP that can help you in speeding up your learning process.