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<?php $field_from_db = 'Hello How are you :slight_smile::joy::_do_not_match:test test::'; $regex = '/:[a-z0-9]+(?:[-’_][a-z0-9]+)*:/i'; preg_match_all($regex, $field_from_db, $matches); var_export($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => ':slight_smile:', 1 => ':joy:', )

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