3v4l.org

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<?php $text = <<<TEXT SU4R C45G G3HD 61U14XE7AR23 914K16W471LV V6SQ5V16LG91 24YL4HW956C3 UZ26J12K615V T741MH4N739W 31ST445G726H 621EH6VW7Q6M 55N629WJ945P 56TX2W6LC949 44DS765CF739 XC262HV1JZ6V 26YD4N1Y71F7 S4M3F1XeDC0D TEXT; preg_match_all( '/\b(?:[a-z\d]{4}(?:[a-z\d]{8})?)\b/i', $text, $matches ); var_export($matches[0]);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => 'SU4R', 1 => 'C45G', 2 => 'G3HD', 3 => '61U14XE7AR23', 4 => '914K16W471LV', 5 => 'V6SQ5V16LG91', 6 => '24YL4HW956C3', 7 => 'UZ26J12K615V', 8 => 'T741MH4N739W', 9 => '31ST445G726H', 10 => '621EH6VW7Q6M', 11 => '55N629WJ945P', 12 => '56TX2W6LC949', 13 => '44DS765CF739', 14 => 'XC262HV1JZ6V', 15 => '26YD4N1Y71F7', 16 => 'S4M3F1XeDC0D', )
preferences:
65.24 ms | 407 KiB | 5 Q