I've been at this game long enough now to recognize that it's more valuable to think of being at a "layer" of the tech stack. In your case with PHP I'm guessing you're part of the web stack. There are plenty of languages for which you'd have plenty of pre-existing web experience that would make it easy to develop in. I'm mostly in the web stack as well and I've used several different languages at different companies and really never cared.
I've been at this game long enough now to recognize that it's more valuable to think of being at a "layer" of the tech stack. In your case with PHP I'm guessing you're part of the web stack. There are plenty of languages for which you'd have plenty of pre-existing web experience that would make it easy to develop in. I'm mostly in the web stack as well and I've used several different languages at different companies and really never cared.