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<?php $string = '12-34-56-78'; $pattern = '/^\d{2}(?|(-)|(---)|(\.)|(\:))\d{2}\1\d{2}\1\d{2}$/'; $matches = preg_match($pattern, $string) === 1; var_dump($matches);
Output for 7.0.0 - 7.0.30, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
bool(true)
preferences:
83.15 ms | 1577 KiB | 4 Q