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<?php $string= "Hi #geeting #shortAnswer #notUseful"; preg_match_all('/#(\w+)/',$string, $matches); echo "The matches:\n"; foreach ($matches[1] as $tag) { echo $tag."\n"; } var_dump($matches);
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 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 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 - 8.3.6
The matches: geeting shortAnswer notUseful array(2) { [0]=> array(3) { [0]=> string(8) "#geeting" [1]=> string(12) "#shortAnswer" [2]=> string(10) "#notUseful" } [1]=> array(3) { [0]=> string(7) "geeting" [1]=> string(11) "shortAnswer" [2]=> string(9) "notUseful" } }

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287.42 ms | 406 KiB | 347 Q