CentOS installs multiple versions of PHP and switches

The same linux Multiple can be installed in the system php Version of , Installation is the usual installation
After the installation is complete , We can go to php Installation directory

I'd like to say goodbye Installed , 7.4 Version of , and 8 Version of
php The default listening port is 9000 , If both versions are enabled , Then it will definitely conflict , therefore , I let 8 Version listening 9001 port

stay There is one in this directory www.conf

So it was modified php8 The listening port of is 9001

---

When it's done , We are going to put php 8 Of bin The directory is placed in the environment variable


stay End of file At the end of Add... At the end The upper two paragraphs
And then run source /etc/profile Make the document effective

---

After I finished running , Something's wrong , When I use php -v When , It's still for me php 7.4.28 Result , The problem has been solved for a long time , Just found out my /usr/bin/ There is a php The order of , It was before php7.4.28 Of , Every time it looks, it finds /usr/bin/php The order of , therefore , I put /usr/bin/php The file group was deleted , Run again srouce /etc/profile complete

after , Reuse php -v Got it. The desired result