You can change php version of composer without uninstalling it, follow these steps :

1. Search for system environment variables in cortana.
2. Click on the button "Environment variables".
3. Under "System variables" select path and click on edit, you will see one entry like this "C:\wamp\bin\php\php5.6.13".
4. Just change this to the folder name of the php located at your wamp/bin/php7.1.9, here php7.1.9 is folder name.
5. Replace php5.6.13 with bin7.1.9, it will look like these "C:\wamp\bin\php\php7.1.9", just click ok on all the boxes.
6. You are done.
7. To verify, first close all the cmd windows, than open cmd and type php -v, press enter and you should see php7.1.9.
8. If you don't see change in php version than just restart your pc and run php -v again in cmd , it will work.

You can uninstall composer, and while re-installing it will ask you to point at your PHP directory which is going to be C:\wamp64\bin\php (usually) at that point you can choose which PHP version you would want to use. good luck.

Hi @XR220 ,

I suggest you install php manager in IIS. It can help you manage different versions of php and it is simpler to add new php than configure fastcgi manually. Download it from here.

Please download php from this link and choose the zip:

Please put all php folders in C:\Program Files (x86)\PHP for ease of management. (Web PI also install php in this folder)

1. Click php manager to register new php version.
   
2. Choose the php-cgi.exe of php 7.3.31 and OK.
   
3. Click Change php version to check which version of php is using now.
   
4. Then click Check php info and OK, it will output the version of php.
   

If it doesn't output php version correctly and show error that fastcgi exited unexpectedly, you can use command line to run php-cgi.exe. It will tell you why php run failed. When I tested php 7.3.31, it ran failed because VCRUNTIME140.dll is missing. If you have same issue, please download it from here. Choose the x64 or x86 according to your machine.

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Best regards,
Bruce Zhang

This is done with chocolatey installed.

• Run Windows Powershell with admin rights
• Execute choco upgrade php --version=8.2
• Check current php version after installation with php -v

If still on old version:

• Run windows search for "Edit the system environment variables"
• Click on "Environment Variables"
• Under "System variables", click on "Path" and Edit
• Remove the outdated php directory (e.g. C:\xampp\php)
• Notice the new php version path that has "php82"
• Check php version

If still not updated:

• Check php path with which php in git bash (the directory will be C:\xampp\php if it outputs /c/xampp/php/php)
• Go to the new php version path and replace folder to the directory (have to rename the new folder to match the original, mine will be renamed from "php82" to "php")
• Check php version