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<?php $re = '/(?<!\S)\+?0*(?:91-)?\K(?:91)?[6-9][0-9]{9}(?!\S)/m'; $str = '+918877665544 test 0918877665544 0000918877665544 test +91-8877665544 test 91-8877665544 test 00008877665544 test +91-88776655440 91-88-77665544 +818877665544 0918877665544 0000918877665544 +91-8877665544 92-8877665544 00002877665544'; preg_match_all($re, $str, $matches); print_r($matches[0]);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Array ( [0] => 918877665544 [1] => 918877665544 [2] => 918877665544 [3] => 8877665544 [4] => 8877665544 [5] => 8877665544 [6] => 918877665544 [7] => 918877665544 [8] => 8877665544 )

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135.66 ms | 408 KiB | 5 Q