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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, $match); print_r($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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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 [1] => -"exclude phrase" [2] => "phrase 1" [3] => keyword [4] => +k:v [5] => -k2:v2 [6] => +"q kw":2 ) [flag] => Array ( [0] => - [1] => - [2] => [3] => [4] => + [5] => - [6] => + ) [1] => Array ( [0] => - [1] => - [2] => [3] => [4] => + [5] => - [6] => + ) [key] => Array ( [0] => [1] => [2] => [3] => [4] => k: [5] => k2: [6] => "q kw" ) [2] => Array ( [0] => [1] => [2] => [3] => [4] => k: [5] => k2: [6] => "q kw" ) [value] => Array ( [0] => exclude [1] => "exclude phrase" [2] => "phrase 1" [3] => keyword [4] => v [5] => v2 [6] => :2 ) [3] => Array ( [0] => exclude [1] => "exclude phrase" [2] => "phrase 1" [3] => keyword [4] => v [5] => v2 [6] => :2 ) )
Output for 4.3.0 - 4.3.2
Array ( [0] => Array ( [0] => -exclude [1] => -"exclude phrase" [2] => "phrase 1" [3] => keyword [4] => +k:v [5] => -k2:v2 [6] => +"q kw":2 ) [1] => Array ( [0] => - [1] => - [2] => [3] => [4] => + [5] => - [6] => + ) [2] => Array ( [0] => [1] => [2] => [3] => [4] => k: [5] => k2: [6] => "q kw" ) [3] => Array ( [0] => exclude [1] => "exclude phrase" [2] => "phrase 1" [3] => keyword [4] => v [5] => v2 [6] => :2 ) )

preferences:
231.93 ms | 403 KiB | 314 Q