Reset phpstan to level 8... there's too many issues working with mixed and needing to cast to a specific type like string; but the alternative for maintaining exact types is a unnecessar extra of code for explicit handling of casting with checks that we don't need when we know datatypes from manual viewing of the codebase (#2585)

CHANGELOG.md

@@ -7,8 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ## Unreleased - TBD
 
-- Fixed `ReferenceHelper@insertNewBefore` behavior when removing column before last column with null value
-
 ### Added
 
 - Improved support for passing of array arguments to Excel function implementations to return array results (where appropriate). [Issue #2551](https://github.com/PHPOffice/PhpSpreadsheet/issues/2551)
@@ -51,6 +49,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
+- Fixed `ReferenceHelper@insertNewBefore` behavior when removing column before last column with null value
 - Fix bug with `DOLLARDE()` and `DOLLARFR()` functions when the dollar value is negative [Issue #2578](https://github.com/PHPOffice/PhpSpreadsheet/issues/2578) [PR #2579](https://github.com/PHPOffice/PhpSpreadsheet/pull/2579)
 - Fix partial function name matching when translating formulae from Russian to English [Issue #2533](https://github.com/PHPOffice/PhpSpreadsheet/issues/2533) [PR #2534](https://github.com/PHPOffice/PhpSpreadsheet/pull/2534)
 - Various bugs related to Conditional Formatting Rules, and errors in the Xlsx Writer for Conditional Formatting [PR #2491](https://github.com/PHPOffice/PhpSpreadsheet/pull/2491)

phpstan.neon.dist

@@ -5,7 +5,7 @@ includes:
     - vendor/phpstan/phpstan-phpunit/rules.neon
 
 parameters:
-    level: max
+    level: 8
     paths:
         - src/
         - tests/

src/PhpSpreadsheet/Calculation/TextData/Replace.php

@@ -88,6 +88,14 @@ class Replace
             return $e->getMessage();
         }
 
+        return self::executeSubstitution($text, $fromText, $toText, $instance);
+    }
+
+    /**
+     * @return string
+     */
+    private static function executeSubstitution(string $text, string $fromText, string $toText, int $instance)
+    {
         $pos = -1;
         while ($instance > 0) {
             $pos = mb_strpos($text, $fromText, $pos + 1, 'UTF-8');

src/PhpSpreadsheet/Worksheet/AutoFilter/Column.php

@@ -394,7 +394,6 @@ class Column
                 foreach ($value as $k => $v) {
                     $cloned = clone $v;
                     $cloned->setParent($this); // attach the new cloned Rule to this new cloned Autofilter Cloned object
-                    // @phpstan-ignore-next-line
                     $this->ruleset[$k] = $cloned;
                 }
             } else {