3v4l.org

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<?php $id = 'a1'; if (preg_match('/[^0-9]/',$id)) { print "Match"; } else { print "No Match"; }
Output for 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Match
preferences:
48.17 ms | 860 KiB | 4 Q