3v4l.org

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<?php $tests = [ 'Stack-Overflow Questions Tags Users', 'Stack Overflow Close Vote Reviewers', 'Jean-Claude Vandàmme' ]; var_export( preg_replace('/\w\K\w*\W*/u', '', $tests) );
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array ( 0 => 'SOQTU', 1 => 'SOCVR', 2 => 'JCV', )
preferences:
74.27 ms | 402 KiB | 91 Q