diff --git a/lib/Model.php b/lib/Model.php
index 8855f43c..fde5b4fa 100644
--- a/lib/Model.php
+++ b/lib/Model.php
@@ -1515,7 +1515,7 @@ public static function __callStatic(string $method, mixed $args): mixed
             $method = 'find_by' . substr($method, 17);
         }
 
-        if ('find_by' === substr($method, 0, 7)) {
+        if (str_starts_with($method, 'find_by')) {
             $attributes = substr($method, 8);
             $options['conditions'] = SQLBuilder::create_conditions_from_underscored_string(static::connection(), $attributes, $args, static::$alias_attribute);
 
@@ -1524,7 +1524,7 @@ public static function __callStatic(string $method, mixed $args): mixed
             }
 
             return $ret;
-        } elseif ('find_all_by' === substr($method, 0, 11)) {
+        } elseif (str_starts_with($method, 'find_all_by')) {
             $options['conditions'] = SQLBuilder::create_conditions_from_underscored_string(static::connection(), substr($method, 12), $args, static::$alias_attribute);
 
             return static::find('all', $options);
diff --git a/lib/PhpStan/FindAllDynamicMethodReturnTypeReflection.php b/lib/PhpStan/FindAllDynamicMethodReturnTypeReflection.php
new file mode 100644
index 00000000..c38069e3
--- /dev/null
+++ b/lib/PhpStan/FindAllDynamicMethodReturnTypeReflection.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace ActiveRecord\PhpStan;
+
+namespace ActiveRecord\PhpStan;
+
+use ActiveRecord\Model;
+use PhpParser\Node\Expr\StaticCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\Reflection\MethodReflection;
+use PHPStan\Type\ArrayType;
+use PHPStan\Type\DynamicStaticMethodReturnTypeExtension;
+use PHPStan\Type\IntegerType;
+use PHPStan\Type\ObjectType;
+use PHPStan\Type\Type;
+
+class FindAllDynamicMethodReturnTypeReflection implements DynamicStaticMethodReturnTypeExtension
+{
+    public function getClass(): string
+    {
+        return Model::class;
+    }
+
+    public function isStaticMethodSupported(MethodReflection $methodReflection): bool
+    {
+        $name = $methodReflection->getName();
+        $pos = strpos($name, 'find_all');
+
+        return 0 === $pos;
+    }
+
+    public function getTypeFromStaticMethodCall(MethodReflection $methodReflection, StaticCall $methodCall, Scope $scope): Type
+    {
+        $class = $methodReflection->getDeclaringClass();
+
+        return new ArrayType(
+            new IntegerType(),
+            new ObjectType($class->getName())
+        );
+    }
+}
diff --git a/lib/PhpStan/ModelMethodsClassReflectionExtension.php b/lib/PhpStan/ModelMethodsClassReflectionExtension.php
new file mode 100644
index 00000000..8297bc72
--- /dev/null
+++ b/lib/PhpStan/ModelMethodsClassReflectionExtension.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ActiveRecord\PhpStan;
+
+use ActiveRecord\Model;
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\MethodReflection;
+use PHPStan\Reflection\MethodsClassReflectionExtension;
+
+class ModelMethodsClassReflectionExtension implements MethodsClassReflectionExtension
+{
+    public function hasMethod(ClassReflection $classReflection, string $methodName): bool
+    {
+        if ($classReflection->isSubclassOf(Model::class)) {
+            if (preg_match('/find_(all_)?by_/', $methodName)) {
+                return true;
+            }
+
+            if (str_ends_with($methodName, '_set')) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function getMethod(ClassReflection $classReflection, string $methodName): MethodReflection
+    {
+        return new ModelStaticMethodReflection($classReflection, $methodName);
+    }
+}
diff --git a/lib/PhpStan/ModelParameterReflection.php b/lib/PhpStan/ModelParameterReflection.php
new file mode 100644
index 00000000..7ed44f2f
--- /dev/null
+++ b/lib/PhpStan/ModelParameterReflection.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ActiveRecord\PhpStan;
+
+use PHPStan\Reflection\ParameterReflection;
+use PHPStan\Reflection\PassedByReference;
+use PHPStan\Type\MixedType;
+use PHPStan\Type\Type;
+
+class ModelParameterReflection implements ParameterReflection
+{
+    public function getName(): string
+    {
+        return 'name';
+    }
+
+    public function isOptional(): bool
+    {
+        return false;
+    }
+
+    public function getDefaultValue(): ?Type
+    {
+        return null;
+    }
+
+    public function getType(): Type
+    {
+        return new MixedType();
+    }
+
+    public function passedByReference(): PassedByReference
+    {
+        return PassedByReference::createNo();
+    }
+
+    public function isVariadic(): bool
+    {
+        return false;
+    }
+}
diff --git a/lib/PhpStan/ModelStaticMethodReflection.php b/lib/PhpStan/ModelStaticMethodReflection.php
new file mode 100644
index 00000000..3c60985f
--- /dev/null
+++ b/lib/PhpStan/ModelStaticMethodReflection.php
@@ -0,0 +1,186 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ActiveRecord\PhpStan;
+
+use ActiveRecord\SQLBuilder;
+use PHPStan\Reflection\ClassMemberReflection;
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\FunctionVariant;
+use PHPStan\Reflection\MethodReflection;
+use PHPStan\TrinaryLogic;
+use PHPStan\Type\ArrayType;
+use PHPStan\Type\Generic\TemplateTypeMap;
+use PHPStan\Type\IntegerType;
+use PHPStan\Type\NullType;
+use PHPStan\Type\ObjectType;
+use PHPStan\Type\UnionType;
+use PHPStan\Type\VoidType;
+
+class ModelStaticMethodReflection implements MethodReflection
+{
+    private ClassReflection $classReflection;
+    private string $name;
+
+    public function __construct(ClassReflection $classReflection, string $name)
+    {
+        $this->classReflection = $classReflection;
+        $this->name = $name;
+    }
+
+    public function isFinal(): TrinaryLogic
+    {
+        // TODO: Implement isFinal() method.
+        return TrinaryLogic::createNo();
+    }
+
+    public function isInternal(): TrinaryLogic
+    {
+        // TODO: Implement isInternal() method.
+        return TrinaryLogic::createNo();
+    }
+
+    public function getDocComment(): ?string
+    {
+        // TODO: Implement getDocComment() method.
+        return null;
+    }
+
+    public function isDeprecated(): TrinaryLogic
+    {
+        // TODO: Implement isDeprecated() method.
+        return TrinaryLogic::createNo();
+    }
+
+    public function hasSideEffects(): TrinaryLogic
+    {
+        // TODO: Implement hasSideEffects() method.
+        return TrinaryLogic::createMaybe();
+    }
+
+    public function getThrowType(): ?\PHPStan\Type\Type
+    {
+        // TODO: Implement getThrowType() method.
+        return null;
+    }
+
+    public function getDeprecatedDescription(): ?string
+    {
+        // TODO: Implement getDeprecatedDescription() method.
+        return null;
+    }
+
+    public function getDeclaringClass(): ClassReflection
+    {
+        return $this->classReflection;
+    }
+
+    public function getPrototype(): ClassMemberReflection
+    {
+        return $this;
+    }
+
+    public function isStatic(): bool
+    {
+        return true;
+    }
+
+    public function isPrivate(): bool
+    {
+        return false;
+    }
+
+    public function isPublic(): bool
+    {
+        return true;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function isVariadic(): bool
+    {
+        return false;
+    }
+
+    /**
+     * @return \PHPStan\Reflection\ParametersAcceptor[]
+     */
+    public function getVariants(): array
+    {
+        if (str_starts_with($this->name, 'find_by')) {
+            $parts = SQLBuilder::underscored_string_to_parts(substr($this->name, 8), 0);
+
+            return [
+                new FunctionVariant(
+                    TemplateTypeMap::createEmpty(),
+                    TemplateTypeMap::createEmpty(),
+                    array_fill(0, count($parts), new ModelParameterReflection()),
+                    false,
+                    new UnionType([
+                        new ObjectType($this->classReflection->getDisplayName()),
+                        new NullType()
+                    ])
+                )
+            ];
+        } elseif (str_starts_with($this->name, 'find_all')) {
+            $parts = SQLBuilder::underscored_string_to_parts(substr($this->name, 9), 0);
+
+            return [
+                new FunctionVariant(
+                    TemplateTypeMap::createEmpty(),
+                    TemplateTypeMap::createEmpty(),
+                    array_fill(0, count($parts), new ModelParameterReflection()),
+                    false,
+                    new ArrayType(
+                        new IntegerType(),
+                        new ObjectType($this->classReflection->getDisplayName()),
+                    )
+                )
+            ];
+        } elseif (preg_match('/_set$/', $this->name)) {
+            return [
+                new FunctionVariant(
+                    TemplateTypeMap::createEmpty(),
+                    TemplateTypeMap::createEmpty(),
+                    [new ModelParameterReflection()],
+                    false,
+                    new ObjectType($this->classReflection->getDisplayName())
+                )
+            ];
+        } elseif (preg_match('/_refresh/', $this->name)) {
+            return [
+                new FunctionVariant(
+                    TemplateTypeMap::createEmpty(),
+                    TemplateTypeMap::createEmpty(),
+                    [],
+                    false,
+                    new VoidType()
+                )
+            ];
+        } elseif (preg_match('/_dirty/', $this->name)) {
+            return [
+                new FunctionVariant(
+                    TemplateTypeMap::createEmpty(),
+                    TemplateTypeMap::createEmpty(),
+                    [],
+                    false,
+                    new VoidType()
+                )
+            ];
+        }
+
+        return [
+            new FunctionVariant(
+                TemplateTypeMap::createEmpty(),
+                TemplateTypeMap::createEmpty(),
+                [],
+                false,
+                new ObjectType($this->classReflection->getDisplayName())
+            ),
+        ];
+    }
+}
diff --git a/lib/SQLBuilder.php b/lib/SQLBuilder.php
index 61759a90..be5b58fb 100644
--- a/lib/SQLBuilder.php
+++ b/lib/SQLBuilder.php
@@ -251,6 +251,14 @@ public static function reverse_order(string $order = ''): string
         return join(',', $parts);
     }
 
+    /**
+     * @return array<mixed>
+     */
+    public static function underscored_string_to_parts(string $string, int $flags=PREG_SPLIT_DELIM_CAPTURE): array
+    {
+        return preg_split('/(_and_|_or_)/i', $string, -1, $flags);
+    }
+
     /**
      * Converts a string like "id_and_name_or_z" into a conditions value like array("id=? AND name=? OR z=?", values, ...).
      *
@@ -267,10 +275,11 @@ public static function create_conditions_from_underscored_string(Connection $con
             return null;
         }
 
-        $parts = preg_split('/(_and_|_or_)/i', $name, -1, PREG_SPLIT_DELIM_CAPTURE);
         $num_values = count((array) $values);
         $conditions = [''];
 
+        $parts = static::underscored_string_to_parts($name);
+
         for ($i = 0, $j = 0, $n = count($parts); $i < $n; $i += 2, ++$j) {
             if ($i >= 2) {
                 $res = preg_replace(['/_and_/i', '/_or_/i'], [' AND ', ' OR '], $parts[$i - 1]);
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index bf5a659d..5dca0cd0 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -13,6 +13,14 @@ services:
         class: ActiveRecord\PhpStan\FindDynamicMethodReturnTypeReflection
         tags:
           - phpstan.broker.dynamicStaticMethodReturnTypeExtension
+    -
+        class: ActiveRecord\PhpStan\FindAllDynamicMethodReturnTypeReflection
+        tags:
+          - phpstan.broker.dynamicStaticMethodReturnTypeExtension
+    -
+        class: ActiveRecord\PhpStan\ModelMethodsClassReflectionExtension
+        tags:
+          - phpstan.broker.methodsClassReflectionExtension
 
 includes:
 	- vendor/phpstan/phpstan-phpunit/extension.neon
diff --git a/test/phpstan/PhpStanReflectionTests.php b/test/phpstan/DynamicFInd.php
similarity index 100%
rename from test/phpstan/PhpStanReflectionTests.php
rename to test/phpstan/DynamicFInd.php
diff --git a/test/phpstan/DynamicFindAll.php b/test/phpstan/DynamicFindAll.php
new file mode 100644
index 00000000..808ce4fd
--- /dev/null
+++ b/test/phpstan/DynamicFindAll.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * This file is not something we need to execute in tests. It's included
+ * only as a means to test and aid in the development of dynamic PHPStan
+ * extensions. If it doesn't emit any errors when you run 'composer stan',
+ * then everything is working fine.
+ *
+ * see lib/PhpStan/FindDynamicAllMethodReturnTypeReflection.php
+ */
+
+use test\models\Book;
+
+$book = Book::find_all_by_name('Foo');
+assert(is_array($book));
+
+$book = Book::find_all_by_name_and_publisher('Foo', 'Penguin');
+assert(is_array($book));
diff --git a/test/phpstan/DynamicFindBy.php b/test/phpstan/DynamicFindBy.php
new file mode 100644
index 00000000..4621b7e5
--- /dev/null
+++ b/test/phpstan/DynamicFindBy.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * This file is not something we need to execute in tests. It's included
+ * only as a means to test and aid in the development of dynamic PHPStan
+ * extensions. If it doesn't emit any errors when you run 'composer stan',
+ * then everything is working fine.
+ *
+ * see lib/PhpStan/FindDynamicByMethodReturnTypeReflection.php
+ */
+
+use test\models\Book;
+
+$book = Book::find_by_name('Walden');
+assert($book instanceof Book);
+
+$book = Book::find_by_name_and_publisher('Walden', 'Random House');
+assert(is_null($book));