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<?php var_dump(preg_split('/\R| /m', '翶耆倈者耈翶耆倈傀堀X蔀耖耄')); var_dump(preg_split('/\R| /mu', '翶耆倈者耈翶耆倈傀堀X蔀耖耄'));
Output for 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> string(11) "翶耆倈�" [1]=> string(28) "耈翶耆倈傀堀X蔀耖耄" } array(1) { [0]=> string(40) "翶耆倈者耈翶耆倈傀堀X蔀耖耄" }

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