diff --git a/src/Type/Php/PgDmlDynamicReturnTypeExtension.php b/src/Type/Php/PgDmlDynamicReturnTypeExtension.php
new file mode 100644
index 0000000000..769cd0ad39
--- /dev/null
+++ b/src/Type/Php/PgDmlDynamicReturnTypeExtension.php
@@ -0,0 +1,104 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Php;
+
+use PhpParser\Node\Expr\FuncCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Reflection\FunctionReflection;
+use PHPStan\Reflection\ParametersAcceptorSelector;
+use PHPStan\TrinaryLogic;
+use PHPStan\Type\BitwiseFlagHelper;
+use PHPStan\Type\BooleanType;
+use PHPStan\Type\Constant\ConstantBooleanType;
+use PHPStan\Type\DynamicFunctionReturnTypeExtension;
+use PHPStan\Type\StringType;
+use PHPStan\Type\Type;
+use PHPStan\Type\TypeCombinator;
+use function array_key_exists;
+
+#[AutowiredService]
+final class PgDmlDynamicReturnTypeExtension implements DynamicFunctionReturnTypeExtension
+{
+
+	/** @var array<string, int> */
+	private array $flagsArgPositions = [
+		'pg_insert' => 3,
+		'pg_update' => 4,
+		'pg_delete' => 3,
+		'pg_select' => 3,
+	];
+
+	public function __construct(private BitwiseFlagHelper $bitwiseFlagAnalyser)
+	{
+	}
+
+	public function isFunctionSupported(FunctionReflection $functionReflection): bool
+	{
+		return array_key_exists($functionReflection->getName(), $this->flagsArgPositions);
+	}
+
+	public function getTypeFromFunctionCall(
+		FunctionReflection $functionReflection,
+		FuncCall $functionCall,
+		Scope $scope,
+	): ?Type
+	{
+		$functionName = $functionReflection->getName();
+		$args = $functionCall->getArgs();
+		$defaultReturnType = ParametersAcceptorSelector::selectFromArgs(
+			$scope,
+			$args,
+			$functionReflection->getVariants(),
+		)->getReturnType();
+
+		$flagsArgPosition = $this->flagsArgPositions[$functionName];
+		if (!isset($args[$flagsArgPosition])) {
+			// default flags are PGSQL_DML_EXEC
+			return $this->getTypeFromFlags($functionName, TrinaryLogic::createNo(), TrinaryLogic::createYes(), $defaultReturnType);
+		}
+
+		$flagsExpr = $args[$flagsArgPosition]->value;
+
+		return $this->getTypeFromFlags(
+			$functionName,
+			$this->bitwiseFlagAnalyser->bitwiseOrContainsConstant($flagsExpr, $scope, 'PGSQL_DML_STRING'),
+			$this->bitwiseFlagAnalyser->bitwiseOrContainsConstant($flagsExpr, $scope, 'PGSQL_DML_EXEC'),
+			$defaultReturnType,
+		);
+	}
+
+	private function getTypeFromFlags(string $functionName, TrinaryLogic $containsString, TrinaryLogic $containsExec, Type $defaultReturnType): ?Type
+	{
+		if ($functionName === 'pg_insert') {
+			// with PGSQL_DML_EXEC the result object is returned even when PGSQL_DML_STRING is also set
+			if ($containsExec->yes()) {
+				return TypeCombinator::remove(
+					TypeCombinator::remove($defaultReturnType, new StringType()),
+					new ConstantBooleanType(true),
+				);
+			}
+			if (!$containsExec->no()) {
+				return null;
+			}
+			if ($containsString->yes()) {
+				return TypeCombinator::union(new StringType(), new ConstantBooleanType(false));
+			}
+			if ($containsString->no()) {
+				return new BooleanType();
+			}
+
+			return null;
+		}
+
+		if ($containsString->yes()) {
+			return TypeCombinator::union(new StringType(), new ConstantBooleanType(false));
+		}
+		if (!$containsString->no()) {
+			return null;
+		}
+
+		return TypeCombinator::remove($defaultReturnType, new StringType());
+	}
+
+}
diff --git a/src/Type/Php/PgLastNoticeDynamicReturnTypeExtension.php b/src/Type/Php/PgLastNoticeDynamicReturnTypeExtension.php
new file mode 100644
index 0000000000..1daab3787c
--- /dev/null
+++ b/src/Type/Php/PgLastNoticeDynamicReturnTypeExtension.php
@@ -0,0 +1,79 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Php;
+
+use PhpParser\Node\Expr\FuncCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Reflection\FunctionReflection;
+use PHPStan\Type\Accessory\AccessoryArrayListType;
+use PHPStan\Type\ArrayType;
+use PHPStan\Type\Constant\ConstantBooleanType;
+use PHPStan\Type\DynamicFunctionReturnTypeExtension;
+use PHPStan\Type\IntegerType;
+use PHPStan\Type\StringType;
+use PHPStan\Type\Type;
+use PHPStan\Type\TypeCombinator;
+
+#[AutowiredService]
+final class PgLastNoticeDynamicReturnTypeExtension implements DynamicFunctionReturnTypeExtension
+{
+
+	private const NOTICE_LAST = 1;
+	private const NOTICE_ALL = 2;
+	private const NOTICE_CLEAR = 3;
+
+	public function isFunctionSupported(FunctionReflection $functionReflection): bool
+	{
+		return $functionReflection->getName() === 'pg_last_notice';
+	}
+
+	public function getTypeFromFunctionCall(
+		FunctionReflection $functionReflection,
+		FuncCall $functionCall,
+		Scope $scope,
+	): Type
+	{
+		$args = $functionCall->getArgs();
+		if (!isset($args[1])) {
+			return new StringType();
+		}
+
+		$types = [];
+		foreach ($scope->getType($args[1]->value)->getConstantScalarValues() as $value) {
+			if ($value === self::NOTICE_LAST) {
+				$types[] = new StringType();
+			} elseif ($value === self::NOTICE_ALL) {
+				$types[] = $this->createAllNoticesType();
+			} elseif ($value === self::NOTICE_CLEAR) {
+				$types[] = new ConstantBooleanType(true);
+			} else {
+				return $this->createUnknownModeType();
+			}
+		}
+
+		if ($types === []) {
+			return $this->createUnknownModeType();
+		}
+
+		return TypeCombinator::union(...$types);
+	}
+
+	private function createAllNoticesType(): Type
+	{
+		return TypeCombinator::intersect(
+			new ArrayType(new IntegerType(), new StringType()),
+			new AccessoryArrayListType(),
+		);
+	}
+
+	private function createUnknownModeType(): Type
+	{
+		return TypeCombinator::union(
+			new StringType(),
+			$this->createAllNoticesType(),
+			new ConstantBooleanType(true),
+		);
+	}
+
+}
diff --git a/src/Type/Php/PgResultStatusDynamicReturnTypeExtension.php b/src/Type/Php/PgResultStatusDynamicReturnTypeExtension.php
new file mode 100644
index 0000000000..8dc1326a9f
--- /dev/null
+++ b/src/Type/Php/PgResultStatusDynamicReturnTypeExtension.php
@@ -0,0 +1,56 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Php;
+
+use PhpParser\Node\Expr\FuncCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Reflection\FunctionReflection;
+use PHPStan\Type\DynamicFunctionReturnTypeExtension;
+use PHPStan\Type\IntegerType;
+use PHPStan\Type\StringType;
+use PHPStan\Type\Type;
+use PHPStan\Type\TypeCombinator;
+
+#[AutowiredService]
+final class PgResultStatusDynamicReturnTypeExtension implements DynamicFunctionReturnTypeExtension
+{
+
+	private const STATUS_LONG = 1;
+	private const STATUS_STRING = 2;
+
+	public function isFunctionSupported(FunctionReflection $functionReflection): bool
+	{
+		return $functionReflection->getName() === 'pg_result_status';
+	}
+
+	public function getTypeFromFunctionCall(
+		FunctionReflection $functionReflection,
+		FuncCall $functionCall,
+		Scope $scope,
+	): ?Type
+	{
+		$args = $functionCall->getArgs();
+		if (!isset($args[1])) {
+			return new IntegerType();
+		}
+
+		$types = [];
+		foreach ($scope->getType($args[1]->value)->getConstantScalarValues() as $value) {
+			if ($value === self::STATUS_LONG) {
+				$types[] = new IntegerType();
+			} elseif ($value === self::STATUS_STRING) {
+				$types[] = new StringType();
+			} else {
+				return null;
+			}
+		}
+
+		if ($types === []) {
+			return null;
+		}
+
+		return TypeCombinator::union(...$types);
+	}
+
+}
diff --git a/tests/PHPStan/Analyser/nsrt/pg-dml.php b/tests/PHPStan/Analyser/nsrt/pg-dml.php
new file mode 100644
index 0000000000..8fb25d2468
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/pg-dml.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace PgDml;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function doInsert(\PgSql\Connection $connection, int $flags): void
+	{
+		assertType('PgSql\Result|false', pg_insert($connection, 'table', []));
+		assertType('PgSql\Result|false', pg_insert($connection, 'table', [], PGSQL_DML_EXEC));
+		assertType('PgSql\Result|false', pg_insert($connection, 'table', [], PGSQL_DML_EXEC | PGSQL_DML_STRING));
+		assertType('string|false', pg_insert($connection, 'table', [], PGSQL_DML_STRING));
+		assertType('string|false', pg_insert($connection, 'table', [], PGSQL_DML_NO_CONV | PGSQL_DML_STRING));
+		assertType('bool', pg_insert($connection, 'table', [], PGSQL_DML_ASYNC));
+		assertType('bool|PgSql\Result|string', pg_insert($connection, 'table', [], $flags));
+	}
+
+	public function doUpdate(\PgSql\Connection $connection, int $flags): void
+	{
+		assertType('bool', pg_update($connection, 'table', [], []));
+		assertType('bool', pg_update($connection, 'table', [], [], PGSQL_DML_EXEC));
+		assertType('string|false', pg_update($connection, 'table', [], [], PGSQL_DML_STRING));
+		assertType('string|false', pg_update($connection, 'table', [], [], PGSQL_DML_EXEC | PGSQL_DML_STRING));
+		assertType('bool|string', pg_update($connection, 'table', [], [], $flags));
+	}
+
+	public function doDelete(\PgSql\Connection $connection, int $flags): void
+	{
+		assertType('bool', pg_delete($connection, 'table', []));
+		assertType('bool', pg_delete($connection, 'table', [], PGSQL_DML_EXEC));
+		assertType('string|false', pg_delete($connection, 'table', [], PGSQL_DML_STRING));
+		assertType('bool|string', pg_delete($connection, 'table', [], $flags));
+	}
+
+	public function doSelect(\PgSql\Connection $connection, int $flags): void
+	{
+		assertType('array<int, array>|false', pg_select($connection, 'table', []));
+		assertType('array<int, array>|false', pg_select($connection, 'table', [], PGSQL_DML_EXEC));
+		assertType('string|false', pg_select($connection, 'table', [], PGSQL_DML_STRING));
+		assertType('array<int, array>|string|false', pg_select($connection, 'table', [], $flags));
+	}
+
+}
diff --git a/tests/PHPStan/Analyser/nsrt/pg-last-notice.php b/tests/PHPStan/Analyser/nsrt/pg-last-notice.php
new file mode 100644
index 0000000000..6d618f28d8
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/pg-last-notice.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace PgLastNotice;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	/**
+	 * @param mixed $connection
+	 */
+	public function doFoo($connection, int $mode): void
+	{
+		assertType('string', pg_last_notice($connection));
+		assertType('string', pg_last_notice($connection, PGSQL_NOTICE_LAST));
+		assertType('list<string>', pg_last_notice($connection, PGSQL_NOTICE_ALL));
+		assertType('true', pg_last_notice($connection, PGSQL_NOTICE_CLEAR));
+		assertType('list<string>|string|true', pg_last_notice($connection, $mode));
+		assertType('list<string>|string|true', pg_last_notice($connection, 42));
+
+		if ($mode === PGSQL_NOTICE_LAST || $mode === PGSQL_NOTICE_ALL) {
+			assertType('list<string>|string', pg_last_notice($connection, $mode));
+		}
+	}
+
+}
diff --git a/tests/PHPStan/Analyser/nsrt/pg-result-status.php b/tests/PHPStan/Analyser/nsrt/pg-result-status.php
new file mode 100644
index 0000000000..cd4750974d
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/pg-result-status.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace PgResultStatus;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function doFoo(\PgSql\Result $result, int $mode): void
+	{
+		assertType('int', pg_result_status($result));
+		assertType('int', pg_result_status($result, PGSQL_STATUS_LONG));
+		assertType('string', pg_result_status($result, PGSQL_STATUS_STRING));
+		assertType('int|string', pg_result_status($result, $mode));
+
+		if ($mode === PGSQL_STATUS_LONG || $mode === PGSQL_STATUS_STRING) {
+			assertType('int|string', pg_result_status($result, $mode));
+		}
+	}
+
+}