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<?php preg_match( '/^\[storepick]/', 'storepickup_storepickup', $matches); echo $matches[1]; // 1234
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key 1 in /in/dEXqJ on line 3
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 1 in /in/dEXqJ on line 3
Output for 7.3.32 - 7.3.33

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