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<?php $subject = '512345678'; $pattern = '/^(?: [12]\d{6,8}| [3-57-9]\d{8}| 6\d{5,8} )$/x'; $result = preg_match($pattern, $subject, $groups, PREG_OFFSET_CAPTURE); var_dump($result, $groups);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.3 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
int(1) array(1) { [0]=> array(2) { [0]=> string(9) "512345678" [1]=> int(0) } }
Output for 7.0.0 - 7.0.2
int(0) array(0) { }

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