diff --git a/NEWS b/NEWS
index b19b09c21442..0872d8dc542a 100644
--- a/NEWS
+++ b/NEWS
@@ -80,6 +80,7 @@ PHP                                                                        NEWS
 
 - Posix:
   . Added validity check to the flags argument for posix_access(). (arshidkv12)
+  . Added validity check to the permissions argument for posix_mkfifo(). (arshidkv12)
 
 - Reflection:
   . Fixed bug GH-20217 (ReflectionClass::isIterable() incorrectly returns true
diff --git a/UPGRADING b/UPGRADING
index 830709b2ae23..8a1c61b9192c 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -81,6 +81,12 @@ PHP 8.6 UPGRADE NOTES
 - Phar:
   . Phar::mungServer() now supports reference values.
 
+- Posix:
+  . posix_access() now throws a ValueError exception if the flags
+    argument is invalid.
+  . posix_mkfifo() now throws a ValueError exception if the permissions
+    argument is invalid.
+
 - Sockets:
   . socket_addrinfo_lookup() now has an additional optional argument $error
     when not null, and on failure, gives the error code (one of the EAI_*
diff --git a/ext/mysqli/mysqli_api.c b/ext/mysqli/mysqli_api.c
index 77a06370cc73..7af90f665854 100644
--- a/ext/mysqli/mysqli_api.c
+++ b/ext/mysqli/mysqli_api.c
@@ -1410,10 +1410,7 @@ PHP_FUNCTION(mysqli_stmt_send_long_data)
 		RETURN_THROWS();
 	}
 
-	if (mysql_stmt_send_long_data(stmt->stmt, param_nr, data, data_len)) {
-		RETURN_FALSE;
-	}
-	RETURN_TRUE;
+	RETURN_BOOL(!mysql_stmt_send_long_data(stmt->stmt, param_nr, data, data_len));
 }
 /* }}} */
 
@@ -1552,10 +1549,7 @@ PHP_FUNCTION(mysqli_stmt_reset)
 
 	MYSQLI_FETCH_RESOURCE_STMT(stmt, mysql_stmt, MYSQLI_STATUS_VALID);
 
-	if (mysql_stmt_reset(stmt->stmt)) {
-		RETURN_FALSE;
-	}
-	RETURN_TRUE;
+	RETURN_BOOL(!mysql_stmt_reset(stmt->stmt));
 }
 /* }}} */
 
diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index 76e14f6ecb0c..a81372349fd4 100644
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -621,6 +621,11 @@ PHP_FUNCTION(posix_mkfifo)
 		RETURN_FALSE;
 	}
 
+	if (mode < 0 || (mode & ~07777)) {
+		zend_argument_value_error(2, "must be between 0 and 0o7777");
+		RETURN_THROWS();
+	}
+
 	result = mkfifo(ZSTR_VAL(path), mode);
 	if (result < 0) {
 		POSIX_G(last_error) = errno;
diff --git a/ext/posix/tests/posix_mkfifo_invalid_mode.phpt b/ext/posix/tests/posix_mkfifo_invalid_mode.phpt
new file mode 100644
index 000000000000..5c9f251adfca
--- /dev/null
+++ b/ext/posix/tests/posix_mkfifo_invalid_mode.phpt
@@ -0,0 +1,36 @@
+--TEST--
+posix_mkfifo(): invalid mode argument
+--SKIPIF--
+<?php
+if (!function_exists("posix_mkfifo")) {
+    die("skip no posix_mkfifo()");
+}
+?>
+--FILE--
+<?php
+
+// Negative mode
+try {
+    posix_mkfifo(__DIR__ . "/testfifo1", -1);
+} catch (ValueError $e) {
+    echo $e->getMessage(), "\n";
+}
+
+// Too large mode
+try {
+    posix_mkfifo(__DIR__ . "/testfifo2", 010000); // > 07777
+} catch (ValueError $e) {
+    echo $e->getMessage(), "\n";
+}
+
+// Garbage bits
+try {
+    posix_mkfifo(__DIR__ . "/testfifo3", 020000); // S_IFCHR bit
+} catch (ValueError $e) {
+    echo $e->getMessage(), "\n";
+}
+?>
+--EXPECTF--
+posix_mkfifo(): Argument #2 ($permissions) must be between 0 and 0o7777
+posix_mkfifo(): Argument #2 ($permissions) must be between 0 and 0o7777
+posix_mkfifo(): Argument #2 ($permissions) must be between 0 and 0o7777
diff --git a/ext/standard/dns_win32.c b/ext/standard/dns_win32.c
index 1f7c6c0146e4..8caf5813395c 100644
--- a/ext/standard/dns_win32.c
+++ b/ext/standard/dns_win32.c
@@ -116,11 +116,7 @@ PHP_FUNCTION(dns_check_record)
 
 	status = DnsQuery_A(hostname, type, DNS_QUERY_STANDARD, NULL, &pResult, NULL);
 
-	if (status) {
-		RETURN_FALSE;
-	}
-
-	RETURN_TRUE;
+	RETURN_BOOL(!status);
 }
 /* }}} */
 
diff --git a/ext/standard/file.c b/ext/standard/file.c
index bd6ee252875e..a7b73f1fe56e 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -1016,10 +1016,8 @@ PHPAPI PHP_FUNCTION(fflush)
 	ZEND_PARSE_PARAMETERS_END();
 
 	ret = php_stream_flush(stream);
-	if (ret) {
-		RETURN_FALSE;
-	}
-	RETURN_TRUE;
+
+	RETURN_BOOL(!ret);
 }
 /* }}} */
 
@@ -1032,10 +1030,7 @@ PHPAPI PHP_FUNCTION(rewind)
 		PHP_Z_PARAM_STREAM(stream)
 	ZEND_PARSE_PARAMETERS_END();
 
-	if (-1 == php_stream_rewind(stream)) {
-		RETURN_FALSE;
-	}
-	RETURN_TRUE;
+	RETURN_BOOL(-1 != php_stream_rewind(stream));
 }
 /* }}} */
 
diff --git a/win32/signal.c b/win32/signal.c
index 49a7c1cc0c91..89548a2405c4 100644
--- a/win32/signal.c
+++ b/win32/signal.c
@@ -131,10 +131,7 @@ PHP_FUNCTION(sapi_windows_set_ctrl_handler)
 	if (!ZEND_FCI_INITIALIZED(fci)) {
 		zval_ptr_dtor(&ctrl_handler);
 		ZVAL_UNDEF(&ctrl_handler);
-		if (!SetConsoleCtrlHandler(NULL, add)) {
-			RETURN_FALSE;
-		}
-		RETURN_TRUE;
+		RETURN_BOOL(SetConsoleCtrlHandler(NULL, add));
 	}
 
 	if (!SetConsoleCtrlHandler(NULL, FALSE) || !SetConsoleCtrlHandler(php_win32_signal_system_ctrl_handler, add)) {