From ba438dc6b50868362a91f1e4aa6e21d6a8260469 Mon Sep 17 00:00:00 2001
From: Tomas Votruba <tomas.vot@gmail.com>
Date: Mon, 26 Oct 2026 13:17:45 +0100
Subject: [PATCH 1/2] Add RemoveSlashFromNativeConstantFixer for PHP and blink

Strips the redundant leading backslash from the true, false and null
constants (\true -> true). Added to the common namespaces set and
ported to the blink Go runner.
---
 blink/README.md                               |  2 +-
 blink/internal/fixer/fixer.go                 |  1 +
 blink/internal/fixer/rules/priorities.go      |  1 +
 blink/internal/fixer/rules/registry.go        |  1 +
 .../remove_slash_from_native_constant.go      | 59 ++++++++++++++
 .../remove_slash_from_native_constant_test.go | 33 ++++++++
 config/set/common/namespaces.php              |  2 +
 .../RemoveSlashFromNativeConstantFixer.php    | 77 +++++++++++++++++++
 .../Fixture/fix_bool_and_null.php.inc         | 29 +++++++
 .../Fixture/keep_casing.php.inc               | 17 ++++
 .../Fixture/skip_namespace_segment.php.inc    | 10 +++
 ...RemoveSlashFromNativeConstantFixerTest.php | 28 +++++++
 .../config/configured_rule.php                | 10 +++
 13 files changed, 269 insertions(+), 1 deletion(-)
 create mode 100644 blink/internal/fixer/rules/remove_slash_from_native_constant.go
 create mode 100644 blink/internal/fixer/rules/remove_slash_from_native_constant_test.go
 create mode 100644 packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php
 create mode 100644 packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/fix_bool_and_null.php.inc
 create mode 100644 packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/keep_casing.php.inc
 create mode 100644 packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/skip_namespace_segment.php.inc
 create mode 100644 packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/RemoveSlashFromNativeConstantFixerTest.php
 create mode 100644 packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/config/configured_rule.php

diff --git a/blink/README.md b/blink/README.md
index c9d8d8c349..80e7af2c28 100644
--- a/blink/README.md
+++ b/blink/README.md
@@ -13,7 +13,7 @@ CI keeps it current.
 | tool | rules | of ECS |
 |---|---:|---:|
 | [ECS](https://github.com/symplify/easy-coding-standard) (baseline) | 207 | 100% |
-| blink | 211 | 101% |
+| blink | 212 | 102% |
 <!-- rule-counts:end -->
 
 ## Build
diff --git a/blink/internal/fixer/fixer.go b/blink/internal/fixer/fixer.go
index 4e843e666a..1ed15174da 100644
--- a/blink/internal/fixer/fixer.go
+++ b/blink/internal/fixer/fixer.go
@@ -41,6 +41,7 @@ var ecsSrcOnlyFixers = map[string]bool{
 	`Symplify\CodingStandard\Fixer\Annotation\RemovePropertyVariableNameDescriptionFixer`: true,
 	`Symplify\CodingStandard\Fixer\Annotation\RemoveMethodNameDuplicateDescriptionFixer`:  true,
 	`Symplify\CodingStandard\Fixer\Annotation\RemoveEventSubscriberDescriptionFixer`:      true,
+	`Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer`:   true,
 }
 
 // Fixer inspects a token stream and mutates it in place. It is the core contract
diff --git a/blink/internal/fixer/rules/priorities.go b/blink/internal/fixer/rules/priorities.go
index bc2f23efc4..531ab11233 100644
--- a/blink/internal/fixer/rules/priorities.go
+++ b/blink/internal/fixer/rules/priorities.go
@@ -14,6 +14,7 @@ var fixerPriority = map[string]int{
 	"FixParamNameTypoFixer":                    -37,
 	"RemoveParamNameReferenceFixer":            -37,
 	"RemoveParamDescriptionDuplicateNameFixer": 7,
+	"RemoveSlashFromNativeConstantFixer":       0,
 	"SwitchedTypeAndNameFixer":                 -37,
 	"RemoveDeadParamFixer":                     -37,
 	"RemoveDeadVarThisFixer":                   -37,
diff --git a/blink/internal/fixer/rules/registry.go b/blink/internal/fixer/rules/registry.go
index 11b2207dd4..ecdeb4f46d 100644
--- a/blink/internal/fixer/rules/registry.go
+++ b/blink/internal/fixer/rules/registry.go
@@ -228,6 +228,7 @@ func StructuralFixers() []fixer.Fixer {
 		SingleBlankLineBeforeNamespace{},
 		BlankLineAfterNamespace{},
 		NoUnusedImports{},
+		RemoveSlashFromNativeConstant{},
 		FullyQualifiedStrictTypes{},
 		SingleImportPerStatement{},
 		OrderedImports{},
diff --git a/blink/internal/fixer/rules/remove_slash_from_native_constant.go b/blink/internal/fixer/rules/remove_slash_from_native_constant.go
new file mode 100644
index 0000000000..f802367db7
--- /dev/null
+++ b/blink/internal/fixer/rules/remove_slash_from_native_constant.go
@@ -0,0 +1,59 @@
+package rules
+
+import (
+	"blink/internal/token"
+	"blink/internal/tokens"
+)
+
+// Symplify: https://github.com/ecsphp/ecs-src/blob/main/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php
+//
+// RemoveSlashFromNativeConstant strips the redundant leading backslash from the
+// true, false and null constants (\true -> true).
+type RemoveSlashFromNativeConstant struct{}
+
+func (RemoveSlashFromNativeConstant) Name() string {
+	return `Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer`
+}
+
+func (RemoveSlashFromNativeConstant) SourceURL() string {
+	return "https://github.com/ecsphp/ecs-src/blob/main/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php"
+}
+
+func (RemoveSlashFromNativeConstant) Fix(s *tokens.Stream) bool {
+	changed := false
+	for i := 0; i < s.Len(); i++ {
+		if s.At(i).Kind != token.Punct || s.At(i).Value != `\` {
+			continue
+		}
+
+		next := nextSignificantIndex(s, i)
+		if next < 0 || s.At(next).Kind != token.Ident {
+			continue
+		}
+
+		lower := lowerASCII(s.At(next).Value)
+		if lower != "true" && lower != "false" && lower != "null" {
+			continue
+		}
+
+		// the keyword must stand alone, not be a namespace segment like
+		// "Foo\true" or "\true\Bar"
+		if prev := prevSignificantIndex(s, i); prev >= 0 {
+			pt := s.At(prev)
+			if pt.Kind == token.Ident || (pt.Kind == token.Punct && pt.Value == `\`) {
+				continue
+			}
+		}
+		if after := nextSignificantIndex(s, next); after >= 0 {
+			at := s.At(after)
+			if at.Kind == token.Punct && at.Value == `\` {
+				continue
+			}
+		}
+
+		s.RemoveAt(i)
+		changed = true
+		i--
+	}
+	return changed
+}
diff --git a/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go b/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go
new file mode 100644
index 0000000000..6e47de5d57
--- /dev/null
+++ b/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go
@@ -0,0 +1,33 @@
+package rules
+
+import "testing"
+
+func TestRemoveSlashFromNativeConstant(t *testing.T) {
+	t.Parallel()
+	f := RemoveSlashFromNativeConstant{}
+
+	// leading backslash on true/false/null is stripped
+	got, changed := apply(t, f, "<?php\nif (\\true) {\n    return \\false;\n}\nreturn \\null;\n")
+	if want := "<?php\nif (true) {\n    return false;\n}\nreturn null;\n"; !changed || got != want {
+		t.Fatalf("strip: changed=%v got=%q", changed, got)
+	}
+
+	// casing is preserved, only the slash goes
+	got, changed = apply(t, f, "<?php\n$x = \\TRUE;\n")
+	if want := "<?php\n$x = TRUE;\n"; !changed || got != want {
+		t.Fatalf("casing: changed=%v got=%q", changed, got)
+	}
+
+	// without a backslash: no-op
+	if _, changed := apply(t, f, "<?php\nreturn true;\n"); changed {
+		t.Fatal("bare constant must be a no-op")
+	}
+
+	// namespace segment named true/null stays untouched
+	if _, changed := apply(t, f, "<?php\nreturn Some\\True\\Value::NAME;\n"); changed {
+		t.Fatal("namespace segment must be a no-op")
+	}
+	if _, changed := apply(t, f, "<?php\nreturn \\true\\Bar::NAME;\n"); changed {
+		t.Fatal("leading segment before more namespace must be a no-op")
+	}
+}
diff --git a/config/set/common/namespaces.php b/config/set/common/namespaces.php
index d2b2b2301d..4afcee6dec 100644
--- a/config/set/common/namespaces.php
+++ b/config/set/common/namespaces.php
@@ -6,6 +6,7 @@
 use PhpCsFixer\Fixer\Import\NoUnusedImportsFixer;
 use PhpCsFixer\Fixer\Import\OrderedImportsFixer;
 use PhpCsFixer\Fixer\NamespaceNotation\SingleBlankLineBeforeNamespaceFixer;
+use Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer;
 use Symplify\EasyCodingStandard\Config\ECSConfig;
 
 return ECSConfig::configure()
@@ -14,4 +15,5 @@
         OrderedImportsFixer::class,
         SingleBlankLineBeforeNamespaceFixer::class,
         NoUnneededImportAliasFixer::class,
+        RemoveSlashFromNativeConstantFixer::class,
     ]);
diff --git a/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php b/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php
new file mode 100644
index 0000000000..948360181a
--- /dev/null
+++ b/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php
@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\CodingStandard\Fixer\ConstantNotation;
+
+use PhpCsFixer\FixerDefinition\CodeSample;
+use PhpCsFixer\FixerDefinition\FixerDefinition;
+use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
+use PhpCsFixer\Tokenizer\Token;
+use PhpCsFixer\Tokenizer\Tokens;
+use SplFileInfo;
+use Symplify\CodingStandard\Fixer\AbstractSymplifyFixer;
+
+/**
+ * @see \Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\RemoveSlashFromNativeConstantFixerTest
+ */
+final class RemoveSlashFromNativeConstantFixer extends AbstractSymplifyFixer
+{
+    private const string ERROR_MESSAGE = 'Remove leading backslash from "true", "false" and "null".';
+
+    /**
+     * @var string[]
+     */
+    private const array KEYWORDS = ['true', 'false', 'null'];
+
+    public function getDefinition(): FixerDefinitionInterface
+    {
+        return new FixerDefinition(self::ERROR_MESSAGE, [new CodeSample("<?php\nreturn \\true;\n")]);
+    }
+
+    /**
+     * @param Tokens<Token> $tokens
+     */
+    public function isCandidate(Tokens $tokens): bool
+    {
+        return $tokens->isTokenKindFound(T_NS_SEPARATOR);
+    }
+
+    /**
+     * @param Tokens<Token> $tokens
+     */
+    public function fix(SplFileInfo $fileInfo, Tokens $tokens): void
+    {
+        foreach ($tokens as $index => $token) {
+            if (! $token->isGivenKind(T_NS_SEPARATOR)) {
+                continue;
+            }
+
+            $nextIndex = $tokens->getNextMeaningfulToken($index);
+            if ($nextIndex === null) {
+                continue;
+            }
+
+            if (! $tokens[$nextIndex]->isGivenKind(T_STRING)) {
+                continue;
+            }
+
+            if (! in_array(strtolower($tokens[$nextIndex]->getContent()), self::KEYWORDS, true)) {
+                continue;
+            }
+
+            // the keyword must be a standalone name, not a namespace segment like "Foo\true" or "\true\Bar"
+            $prevIndex = $tokens->getPrevMeaningfulToken($index);
+            if ($prevIndex !== null && $tokens[$prevIndex]->isGivenKind([T_STRING, T_NS_SEPARATOR])) {
+                continue;
+            }
+
+            $afterKeywordIndex = $tokens->getNextMeaningfulToken($nextIndex);
+            if ($afterKeywordIndex !== null && $tokens[$afterKeywordIndex]->isGivenKind(T_NS_SEPARATOR)) {
+                continue;
+            }
+
+            $tokens->clearAt($index);
+        }
+    }
+}
diff --git a/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/fix_bool_and_null.php.inc b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/fix_bool_and_null.php.inc
new file mode 100644
index 0000000000..a73778414b
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/fix_bool_and_null.php.inc
@@ -0,0 +1,29 @@
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\Fixture;
+
+function fixBoolAndNull()
+{
+    if (\true) {
+        return \false;
+    }
+
+    return \null;
+}
+
+?>
+-----
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\Fixture;
+
+function fixBoolAndNull()
+{
+    if (true) {
+        return false;
+    }
+
+    return null;
+}
+
+?>
diff --git a/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/keep_casing.php.inc b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/keep_casing.php.inc
new file mode 100644
index 0000000000..8b891f1874
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/keep_casing.php.inc
@@ -0,0 +1,17 @@
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\Fixture;
+
+$value = \TRUE;
+$other = \Null;
+
+?>
+-----
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\Fixture;
+
+$value = TRUE;
+$other = Null;
+
+?>
diff --git a/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/skip_namespace_segment.php.inc b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/skip_namespace_segment.php.inc
new file mode 100644
index 0000000000..043dcc82e8
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/Fixture/skip_namespace_segment.php.inc
@@ -0,0 +1,10 @@
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer\Fixture;
+
+use Some\True\Value;
+
+function skipNamespaceSegment()
+{
+    return Some\True\Value::NAME;
+}
diff --git a/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/RemoveSlashFromNativeConstantFixerTest.php b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/RemoveSlashFromNativeConstantFixerTest.php
new file mode 100644
index 0000000000..7fc9124705
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/RemoveSlashFromNativeConstantFixerTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\CodingStandard\Tests\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Symplify\EasyCodingStandard\Testing\PHPUnit\AbstractCheckerTestCase;
+
+final class RemoveSlashFromNativeConstantFixerTest extends AbstractCheckerTestCase
+{
+    #[DataProvider('provideData')]
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFiles(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfig(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}
diff --git a/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/config/configured_rule.php b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/config/configured_rule.php
new file mode 100644
index 0000000000..f18f957be6
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer/config/configured_rule.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer;
+use Symplify\EasyCodingStandard\Config\ECSConfig;
+
+return static function (ECSConfig $ecsConfig): void {
+    $ecsConfig->rule(RemoveSlashFromNativeConstantFixer::class);
+};

From b662038cc33611d5fb5ebb20aeff5579fb46fb54 Mon Sep 17 00:00:00 2001
From: Tomas Votruba <tomas.vot@gmail.com>
Date: Mon, 26 Oct 2026 13:24:32 +0100
Subject: [PATCH 2/2] Keep PHP fixer only; blink port follows in a separate PR

---
 blink/README.md                               |  2 +-
 blink/internal/fixer/fixer.go                 |  1 -
 blink/internal/fixer/rules/priorities.go      |  1 -
 blink/internal/fixer/rules/registry.go        |  1 -
 .../remove_slash_from_native_constant.go      | 59 -------------------
 .../remove_slash_from_native_constant_test.go | 33 -----------
 6 files changed, 1 insertion(+), 96 deletions(-)
 delete mode 100644 blink/internal/fixer/rules/remove_slash_from_native_constant.go
 delete mode 100644 blink/internal/fixer/rules/remove_slash_from_native_constant_test.go

diff --git a/blink/README.md b/blink/README.md
index 80e7af2c28..c9d8d8c349 100644
--- a/blink/README.md
+++ b/blink/README.md
@@ -13,7 +13,7 @@ CI keeps it current.
 | tool | rules | of ECS |
 |---|---:|---:|
 | [ECS](https://github.com/symplify/easy-coding-standard) (baseline) | 207 | 100% |
-| blink | 212 | 102% |
+| blink | 211 | 101% |
 <!-- rule-counts:end -->
 
 ## Build
diff --git a/blink/internal/fixer/fixer.go b/blink/internal/fixer/fixer.go
index 1ed15174da..4e843e666a 100644
--- a/blink/internal/fixer/fixer.go
+++ b/blink/internal/fixer/fixer.go
@@ -41,7 +41,6 @@ var ecsSrcOnlyFixers = map[string]bool{
 	`Symplify\CodingStandard\Fixer\Annotation\RemovePropertyVariableNameDescriptionFixer`: true,
 	`Symplify\CodingStandard\Fixer\Annotation\RemoveMethodNameDuplicateDescriptionFixer`:  true,
 	`Symplify\CodingStandard\Fixer\Annotation\RemoveEventSubscriberDescriptionFixer`:      true,
-	`Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer`:   true,
 }
 
 // Fixer inspects a token stream and mutates it in place. It is the core contract
diff --git a/blink/internal/fixer/rules/priorities.go b/blink/internal/fixer/rules/priorities.go
index 531ab11233..bc2f23efc4 100644
--- a/blink/internal/fixer/rules/priorities.go
+++ b/blink/internal/fixer/rules/priorities.go
@@ -14,7 +14,6 @@ var fixerPriority = map[string]int{
 	"FixParamNameTypoFixer":                    -37,
 	"RemoveParamNameReferenceFixer":            -37,
 	"RemoveParamDescriptionDuplicateNameFixer": 7,
-	"RemoveSlashFromNativeConstantFixer":       0,
 	"SwitchedTypeAndNameFixer":                 -37,
 	"RemoveDeadParamFixer":                     -37,
 	"RemoveDeadVarThisFixer":                   -37,
diff --git a/blink/internal/fixer/rules/registry.go b/blink/internal/fixer/rules/registry.go
index ecdeb4f46d..11b2207dd4 100644
--- a/blink/internal/fixer/rules/registry.go
+++ b/blink/internal/fixer/rules/registry.go
@@ -228,7 +228,6 @@ func StructuralFixers() []fixer.Fixer {
 		SingleBlankLineBeforeNamespace{},
 		BlankLineAfterNamespace{},
 		NoUnusedImports{},
-		RemoveSlashFromNativeConstant{},
 		FullyQualifiedStrictTypes{},
 		SingleImportPerStatement{},
 		OrderedImports{},
diff --git a/blink/internal/fixer/rules/remove_slash_from_native_constant.go b/blink/internal/fixer/rules/remove_slash_from_native_constant.go
deleted file mode 100644
index f802367db7..0000000000
--- a/blink/internal/fixer/rules/remove_slash_from_native_constant.go
+++ /dev/null
@@ -1,59 +0,0 @@
-package rules
-
-import (
-	"blink/internal/token"
-	"blink/internal/tokens"
-)
-
-// Symplify: https://github.com/ecsphp/ecs-src/blob/main/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php
-//
-// RemoveSlashFromNativeConstant strips the redundant leading backslash from the
-// true, false and null constants (\true -> true).
-type RemoveSlashFromNativeConstant struct{}
-
-func (RemoveSlashFromNativeConstant) Name() string {
-	return `Symplify\CodingStandard\Fixer\ConstantNotation\RemoveSlashFromNativeConstantFixer`
-}
-
-func (RemoveSlashFromNativeConstant) SourceURL() string {
-	return "https://github.com/ecsphp/ecs-src/blob/main/packages/coding-standard/src/Fixer/ConstantNotation/RemoveSlashFromNativeConstantFixer.php"
-}
-
-func (RemoveSlashFromNativeConstant) Fix(s *tokens.Stream) bool {
-	changed := false
-	for i := 0; i < s.Len(); i++ {
-		if s.At(i).Kind != token.Punct || s.At(i).Value != `\` {
-			continue
-		}
-
-		next := nextSignificantIndex(s, i)
-		if next < 0 || s.At(next).Kind != token.Ident {
-			continue
-		}
-
-		lower := lowerASCII(s.At(next).Value)
-		if lower != "true" && lower != "false" && lower != "null" {
-			continue
-		}
-
-		// the keyword must stand alone, not be a namespace segment like
-		// "Foo\true" or "\true\Bar"
-		if prev := prevSignificantIndex(s, i); prev >= 0 {
-			pt := s.At(prev)
-			if pt.Kind == token.Ident || (pt.Kind == token.Punct && pt.Value == `\`) {
-				continue
-			}
-		}
-		if after := nextSignificantIndex(s, next); after >= 0 {
-			at := s.At(after)
-			if at.Kind == token.Punct && at.Value == `\` {
-				continue
-			}
-		}
-
-		s.RemoveAt(i)
-		changed = true
-		i--
-	}
-	return changed
-}
diff --git a/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go b/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go
deleted file mode 100644
index 6e47de5d57..0000000000
--- a/blink/internal/fixer/rules/remove_slash_from_native_constant_test.go
+++ /dev/null
@@ -1,33 +0,0 @@
-package rules
-
-import "testing"
-
-func TestRemoveSlashFromNativeConstant(t *testing.T) {
-	t.Parallel()
-	f := RemoveSlashFromNativeConstant{}
-
-	// leading backslash on true/false/null is stripped
-	got, changed := apply(t, f, "<?php\nif (\\true) {\n    return \\false;\n}\nreturn \\null;\n")
-	if want := "<?php\nif (true) {\n    return false;\n}\nreturn null;\n"; !changed || got != want {
-		t.Fatalf("strip: changed=%v got=%q", changed, got)
-	}
-
-	// casing is preserved, only the slash goes
-	got, changed = apply(t, f, "<?php\n$x = \\TRUE;\n")
-	if want := "<?php\n$x = TRUE;\n"; !changed || got != want {
-		t.Fatalf("casing: changed=%v got=%q", changed, got)
-	}
-
-	// without a backslash: no-op
-	if _, changed := apply(t, f, "<?php\nreturn true;\n"); changed {
-		t.Fatal("bare constant must be a no-op")
-	}
-
-	// namespace segment named true/null stays untouched
-	if _, changed := apply(t, f, "<?php\nreturn Some\\True\\Value::NAME;\n"); changed {
-		t.Fatal("namespace segment must be a no-op")
-	}
-	if _, changed := apply(t, f, "<?php\nreturn \\true\\Bar::NAME;\n"); changed {
-		t.Fatal("leading segment before more namespace must be a no-op")
-	}
-}