diff --git a/src/File/FileExcluder.php b/src/File/FileExcluder.php
index 9e6266fc291..22dbe7c0579 100644
--- a/src/File/FileExcluder.php
+++ b/src/File/FileExcluder.php
@@ -7,9 +7,9 @@
 use function in_array;
 use function is_dir;
 use function is_file;
-use function preg_match;
 use function str_starts_with;
 use function strlen;
+use function strpbrk;
 use function substr;
 use const DIRECTORY_SEPARATOR;
 use const FNM_CASEFOLD;
@@ -118,7 +118,7 @@ public static function isAbsolutePath(string $path): bool
 
 	public static function isFnmatchPattern(string $path): bool
 	{
-		return preg_match('~[*?[\]]~', $path) > 0;
+		return strpbrk($path, '*?[]') !== false;
 	}
 
 }
diff --git a/src/Type/Php/LtrimFunctionReturnTypeExtension.php b/src/Type/Php/LtrimFunctionReturnTypeExtension.php
index 9cf4b23cf64..1fcf768cd0e 100644
--- a/src/Type/Php/LtrimFunctionReturnTypeExtension.php
+++ b/src/Type/Php/LtrimFunctionReturnTypeExtension.php
@@ -18,7 +18,7 @@
 use PHPStan\Type\TypeCombinator;
 use function count;
 use function ltrim;
-use function preg_match;
+use function strpbrk;
 
 #[AutowiredService]
 final class LtrimFunctionReturnTypeExtension implements DynamicFunctionReturnTypeExtension
@@ -72,7 +72,7 @@ public function getTypeFromFunctionCall(FunctionReflection $functionReflection,
 					}
 				} elseif ($trimConstantString->getValue() === '\\' && $string->isClassString()->yes()) {
 					$result[] = new ClassStringType();
-				} elseif (preg_match('/\d/', $trimConstantString->getValue()) === 0 && $string->isNumericString()->yes()) {
+				} elseif (strpbrk($trimConstantString->getValue(), '0123456789') === false && $string->isNumericString()->yes()) {
 					$result[] = new IntersectionType([new StringType(), new AccessoryNumericStringType()]);
 				} else {
 					return $defaultType;
diff --git a/src/Type/Php/TrimFunctionDynamicReturnTypeExtension.php b/src/Type/Php/TrimFunctionDynamicReturnTypeExtension.php
index 4a88a6616f0..6627b418f0a 100644
--- a/src/Type/Php/TrimFunctionDynamicReturnTypeExtension.php
+++ b/src/Type/Php/TrimFunctionDynamicReturnTypeExtension.php
@@ -17,8 +17,8 @@
 use PHPStan\Type\TypeCombinator;
 use function count;
 use function in_array;
-use function preg_match;
 use function rtrim;
+use function strpbrk;
 use function trim;
 
 #[AutowiredService]
@@ -77,7 +77,7 @@ public function getTypeFromFunctionCall(
 							true,
 						);
 					}
-				} elseif (preg_match('/\d/', $trimConstantString->getValue()) === 0 && $stringType->isNumericString()->yes()) {
+				} elseif (strpbrk($trimConstantString->getValue(), '0123456789') === false && $stringType->isNumericString()->yes()) {
 					$result[] = new IntersectionType([new StringType(), new AccessoryNumericStringType()]);
 				} else {
 					return $defaultType;