fixes and comment

Author: Girgias

ext/sockets/sockets.c

@@ -1946,6 +1946,9 @@ PHP_FUNCTION(socket_set_option)
 				zend_argument_value_error(4, "must not contain null bytes when argument #3 ($option) is TCP_FUNCTION_BLK");
 				RETURN_THROWS();
 			}
+			/* [...] the unique name of the TCP stack, and should be no longer than
+			 * TCP_FUNCTION_NAME_LEN_MAX-1 characters in length.
+			 * https://github.com/freebsd/freebsd-src/blob/da2c88dfcf4f425e6e0a58d6df3a7c8e88d8df92/share/man/man9/tcp_functions.9#L193C1-L194C50 */
 			if (Z_STRLEN_P(arg4) > TCP_FUNCTION_NAME_LEN_MAX) {
 				zend_argument_value_error(4, "must be less than %zu bytes when argument #3 ($option) is TCP_FUNCTION_BLK", TCP_FUNCTION_NAME_LEN_MAX);
 				RETURN_THROWS();
@@ -2082,11 +2085,11 @@ PHP_FUNCTION(socket_set_option)
 				zend_argument_value_error(4, "must not contain null bytes when argument #3 ($option) is SO_ACCEPTFILTER");
 				RETURN_THROWS();
 			}
+			struct accept_filter_arg af = {0};
 			if (Z_STRLEN_P(arg4) > sizeof(af.af_name)) {
 				zend_argument_value_error(4, "must be less than %zu bytes when argument #3 ($option) is SO_ACCEPTFILTER", sizeof(af.af_name));
 				RETURN_THROWS();
 			}
-			struct accept_filter_arg af = {0};
 			/* Copy the trailing nul byte */
 			memcpy(af.af_name, Z_STRVAL_P(arg4), Z_STRLEN_P(arg4)+1);
 			opt_ptr = ⁡