SearchQuery.php: The method applyTextMatchParamOnQuery uses an else expression. Else clauses are basically not necessary and you can simplify the code by not using them. (ElseExpression, Clean Code Rules)

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PostsController.php: The class PostsController has a coupling between objects value of 25. Consider to reduce the number of dependencies under 13. (CouplingBetweenObjects, Design Rules)

IndexQuery.php: The method query() has a Cyclomatic Complexity of 12. The configured cyclomatic complexity threshold is 10. (CyclomaticComplexity, Code Size Rules)

IndexQuery.php: The method query() has an NPath complexity of 200. The configured NPath complexity threshold is 200. (NPathComplexity, Code Size Rules)

PostsTree.php: The class PostsTree has a coupling between objects value of 17. Consider to reduce the number of dependencies under 13. (CouplingBetweenObjects, Design Rules)

SearchQuery.php: The method applyQueryParamsOnQuery() has a Cyclomatic Complexity of 12. The configured cyclomatic complexity threshold is 10. (CyclomaticComplexity, Code Size Rules)

SearchQuery.php: The method applyQueryParamsOnQuery() has an NPath complexity of 384. The configured NPath complexity threshold is 200. (NPathComplexity, Code Size Rules)

SearchQuery.php: The method applyQueryParamsOnQuery() has 111 lines of code. Current threshold is set to 100. Avoid really long methods. (ExcessiveMethodLength, Code Size Rules)