Fix #26772: fgets returns NULL instead of FALSE.

ext/standard/file.c

@@ -907,7 +907,11 @@ PHPAPI PHP_FUNCTION(fgets)
 		WRONG_PARAM_COUNT;
 	}
 
-	php_stream_from_zval(stream, arg1);
+	php_stream_from_zval_no_verify(stream, arg1);
+	if (stream == NULL) {
+		/* we want false return value, rather than NULL */
+		goto exit_failed;
+	}
 
 	if (argc == 1) {
 		/* ask streams to give us a buffer of an appropriate size */