66
77use PhpMyAdmin \SqlParser \Contexts \ContextMySql50700 ;
88
9+ use function array_map ;
910use function class_exists ;
1011use function explode ;
1112use function in_array ;
2627 *
2728 * Holds the configuration of the context that is currently used.
2829 */
29- abstract class Context
30+ final class Context
3031{
3132 /**
3233 * The maximum length of a keyword.
@@ -54,7 +55,7 @@ abstract class Context
5455 * The prefix concatenated to the context name when an incomplete class name
5556 * is specified.
5657 */
57- public static string $ contextPrefix 'PhpMyAdmin \\SqlParser \\Contexts \\Context ' ;
58+ private const CONTEXT_PREFIX = 'PhpMyAdmin \\SqlParser \\Contexts \\Context ' ;
5859
5960 /**
6061 * List of keywords.
@@ -78,10 +79,8 @@ abstract class Context
7879
7980 /**
8081 * List of operators and their flags.
81- *
82- * @var array<string, int>
8382 */
84- public static array $ operators
83+ private const OPERATORS = [
8584 // Some operators (*, =) may have ambiguous flags, because they depend on
8685 // the context they are being used in.
8786 // For example: 1. SELECT * FROM table; # SQL specific (wildcard)
@@ -366,15 +365,18 @@ public static function isKeyword(string $string, bool $isReserved = false): int|
366365 */
367366 public static function isOperator (string $ stringint |null
368367 {
369- return static :: $ operators $ stringnull ;
368+ return self :: OPERATORS [$ stringnull ;
370369 }
371370
372371 /**
373372 * Checks if the given character is a whitespace.
374373 */
375- public static function isWhitespace (string $ string bool
374+ public static function isWhitespace (string $ character bool
376375 {
377- return $ string' ' || $ string"\r" || $ string"\n" || $ string"\t" ;
376+ return match ($ character
377+ ' ' , "\r" , "\n" , "\t" => true ,
378+ default => false ,
379+ };
378380 }
379381
380382 /**
@@ -384,39 +386,20 @@ public static function isWhitespace(string $string): bool
384386 */
385387 public static function isComment (string $ stringbool $ endfalse ): int |null
386388 {
387- if ($ string'' ) {
388- return null ;
389- }
390-
391- // If comment is Bash style (#):
392- if (str_starts_with ($ string'# ' )) {
393- return Token::FLAG_COMMENT_BASH ;
394- }
395-
396- // If comment is a MySQL command
397- if (str_starts_with ($ string'/*! ' )) {
398- return Token::FLAG_COMMENT_MYSQL_CMD ;
399- }
400-
401- // If comment is opening C style (/*) or is closing C style (*/), warning, it could conflict
402- // with wildcard and a real opening C style.
403- // It would look like the following valid SQL statement: "SELECT */* comment */ FROM...".
404- if (str_starts_with ($ string'/* ' ) || str_starts_with ($ string'*/ ' )) {
405- return Token::FLAG_COMMENT_C ;
406- }
407-
408- // If comment is SQL style (--\s?):
409- if (
389+ return match (true ) {
390+ str_starts_with ($ string'# ' ) => Token::FLAG_COMMENT_BASH ,
391+ str_starts_with ($ string'/*! ' ) => Token::FLAG_COMMENT_MYSQL_CMD ,
392+ // If comment is opening C style (/*) or is closing C style (*/), warning, it could conflict
393+ // with wildcard and a real opening C style.
394+ // It would look like the following valid SQL statement: "SELECT */* comment */ FROM...".
395+ str_starts_with ($ string'/* ' ) || str_starts_with ($ string'*/ ' ) => Token::FLAG_COMMENT_C ,
410396 str_starts_with ($ string'-- ' )
411- || str_starts_with ($ string"-- \r" )
412- || str_starts_with ($ string"-- \n" )
413- || str_starts_with ($ string"-- \t" )
414- || ($ string'-- ' && $ end
415- ) {
416- return Token::FLAG_COMMENT_SQL ;
417- }
418-
419- return null ;
397+ || str_starts_with ($ string"-- \r" )
398+ || str_starts_with ($ string"-- \n" )
399+ || str_starts_with ($ string"-- \t" )
400+ || ($ string'-- ' && $ endFLAG_COMMENT_SQL ,
401+ default => null ,
402+ };
420403 }
421404
422405 /**
@@ -445,49 +428,30 @@ public static function isNumber(string $string): bool
445428 *
446429 * @return int|null the appropriate flag for the symbol type
447430 */
448- public static function isSymbol (string $ string int |null
431+ public static function isSymbol (string $ character int |null
449432 {
450- if ($ string'' ) {
451- return null ;
452- }
453-
454- if (str_starts_with ($ string'@ ' )) {
455- return Token::FLAG_SYMBOL_VARIABLE ;
456- }
457-
458- if (str_starts_with ($ string'` ' )) {
459- return Token::FLAG_SYMBOL_BACKTICK ;
460- }
461-
462- if (str_starts_with ($ string': ' ) || str_starts_with ($ string'? ' )) {
463- return Token::FLAG_SYMBOL_PARAMETER ;
464- }
465-
466- return null ;
433+ return match ($ character
434+ '@ ' => Token::FLAG_SYMBOL_VARIABLE ,
435+ '` ' => Token::FLAG_SYMBOL_BACKTICK ,
436+ ': ' , '? ' => Token::FLAG_SYMBOL_PARAMETER ,
437+ default => null ,
438+ };
467439 }
468440
469441 /**
470442 * Checks if the given character is the beginning of a string.
471443 *
472- * @param string $string string to be checked
444+ * @param string $character a character to be checked
473445 *
474446 * @return int|null the appropriate flag for the string type
475447 */
476- public static function isString (string $ string int |null
448+ public static function isString (string $ character int |null
477449 {
478- if ($ string'' ) {
479- return null ;
480- }
481-
482- if (str_starts_with ($ string'\'' )) {
483- return Token::FLAG_STRING_SINGLE_QUOTES ;
484- }
485-
486- if (str_starts_with ($ string'" ' )) {
487- return Token::FLAG_STRING_DOUBLE_QUOTES ;
488- }
489-
490- return null ;
450+ return match ($ character
451+ '\'' => Token::FLAG_STRING_SINGLE_QUOTES ,
452+ '" ' => Token::FLAG_STRING_DOUBLE_QUOTES ,
453+ default => null ,
454+ };
491455 }
492456
493457 /**
@@ -522,22 +486,19 @@ public static function load(string $context = ''): bool
522486 $ context
523487 }
524488
525- if (! class_exists ($ context
526- if (! class_exists (self ::$ contextPrefix$ context
527- return false ;
528- }
529-
530- // Could be the fully qualified class name was given, like `ContextDBMS::class`.
531- if (class_exists ('\\' . $ context
532- $ context'\\' . $ context
533- } else {
534- // Short context name (must be formatted into class name).
535- $ contextself ::$ contextPrefix$ context
489+ $ contextClass$ context
490+ if (! class_exists ($ contextClass
491+ $ contextClassself ::CONTEXT_PREFIX . $ context
492+ if (! class_exists ($ contextClass
493+ $ contextClass'\\' . $ context
494+ if (! class_exists ($ contextClass
495+ return false ;
496+ }
536497 }
537498 }
538499
539- self ::$ loadedContext$ context
540- self ::$ keywords$ context :: $ keywords
500+ self ::$ loadedContext$ contextClass
501+ self ::$ keywords$ contextClass :: KEYWORDS ;
541502
542503 return true ;
543504 }
@@ -688,11 +649,7 @@ public static function escape(string $str, string $quote = '`'): string
688649 */
689650 public static function escapeAll (array $ stringsarray
690651 {
691- foreach ($ stringsas $ key$ value
692- $ strings$ keystatic ::escape ($ value
693- }
694-
695- return $ strings
652+ return array_map (static ::escape (...), $ strings
696653 }
697654
698655 /**
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