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<?php $search_expression = '+word1 -word2 -"word word"'; $words = preg_split("~\"[^\"]+\"(*SKIP)(*FAIL)|\h+~", $search_expression); print_r($words);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => +word1 [1] => -word2 [2] => -"word word" )

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