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<?php $user = 'Robert John Alex Ridly'; //$user = 'Robert Downey Jr.'; //$user = 'Robert Plant'; //$user = 'Robert'; var_export(preg_split('/^\S+\K | (?=\S+$)/', $user, 0, PREG_SPLIT_NO_EMPTY));
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => 'Robert', 1 => 'John Alex', 2 => 'Ridly', )

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