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<?php $query = "-exclude -\"exclude phrase\" \"phrase 1\" keyword +k:v -k2:v2 +\"q kw\":2"; $ATOM_REGEX = '"[^"]+"|[^"\s]+'; preg_match_all("/(?P<flag>[-+])?(?P<key>$ATOM_REGEX:)?(?P<value>$ATOM_REGEX)/", $query, $match, PREG_SET_ORDER); print_r($match);
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Array ( [0] => -exclude [flag] => - [1] => - [key] => [2] => [value] => exclude [3] => exclude ) [1] => Array ( [0] => -"exclude phrase" [flag] => - [1] => - [key] => [2] => [value] => "exclude phrase" [3] => "exclude phrase" ) [2] => Array ( [0] => "phrase 1" [flag] => [1] => [key] => [2] => [value] => "phrase 1" [3] => "phrase 1" ) [3] => Array ( [0] => keyword [flag] => [1] => [key] => [2] => [value] => keyword [3] => keyword ) [4] => Array ( [0] => +k:v [flag] => + [1] => + [key] => k: [2] => k: [value] => v [3] => v ) [5] => Array ( [0] => -k2:v2 [flag] => - [1] => - [key] => k2: [2] => k2: [value] => v2 [3] => v2 ) [6] => Array ( [0] => +"q kw":2 [flag] => + [1] => + [key] => "q kw" [2] => "q kw" [value] => :2 [3] => :2 ) )
Output for 4.3.0 - 4.3.2
Array ( [0] => Array ( [0] => -exclude [1] => - [2] => [3] => exclude ) [1] => Array ( [0] => -"exclude phrase" [1] => - [2] => [3] => "exclude phrase" ) [2] => Array ( [0] => "phrase 1" [1] => [2] => [3] => "phrase 1" ) [3] => Array ( [0] => keyword [1] => [2] => [3] => keyword ) [4] => Array ( [0] => +k:v [1] => + [2] => k: [3] => v ) [5] => Array ( [0] => -k2:v2 [1] => - [2] => k2: [3] => v2 ) [6] => Array ( [0] => +"q kw":2 [1] => + [2] => "q kw" [3] => :2 ) )

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