Show installed composer packages and their versions

Show all packages

composer show

Example output:

composer/installers                         v2.1.1  A multi-framework Composer library installer
symfony/polyfill-mbstring                   v1.25.0 Symfony polyfill for the Mbstring extension
symfony/var-dumper                          v6.0.8  Provides mechanisms for walking through any arbitrary PHP variable
tightenco/collect                           v8.83.8 Collect - Illuminate Collections as a separate package.
wpackagist-plugin/advanced-custom-fields    5.12.2 
wpackagist-plugin/akismet                   4.2.3  
wpackagist-plugin/better-search-replace     1.4    
wpackagist-plugin/code-syntax-block         3.0.0  
wpackagist-plugin/custom-post-type-ui       1.12.0 
wpackagist-plugin/debug-bar                 1.1.3  
wpackagist-plugin/luckywp-table-of-contents 2.1.4  
wpackagist-plugin/redirection               5.2.3  
wpackagist-plugin/svg-support               2.4.2  
wpackagist-plugin/wordpress-importer        0.7  

Show specific package

You could grep the result if you want to show only a specific version:

composer show | grep custom-post-type

Example output:

wpackagist-plugin/custom-post-type-ui       1.12.0