fix 's' vs 'S' for datetime

ext/date/php_date.c

@@ -1435,7 +1435,7 @@ PHP_FUNCTION(strtotime)
 
 	tzi = get_timezone_info(TSRMLS_C);
 
-	if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "sl", &times, &time_len, &preset_ts) != FAILURE) {
+	if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "Sl", &times, &time_len, &preset_ts) != FAILURE) {
 		/* We have an initial timestamp */
 		now = timelib_time_ctor();
 
@@ -1448,7 +1448,7 @@ PHP_FUNCTION(strtotime)
 		timelib_unixtime2local(now, t->sse);
 		timelib_time_dtor(t);
 		efree(initial_ts);
-	} else if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &times, &time_len, &preset_ts) != FAILURE) {
+	} else if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "S|l", &times, &time_len, &preset_ts) != FAILURE) {
 		/* We have no initial timestamp */
 		now = timelib_time_ctor();
 		now->tz_info = tzi;
@@ -4391,7 +4391,7 @@ PHP_METHOD(DatePeriod, __construct)
 	zend_replace_error_handling(EH_THROW, NULL, &error_handling TSRMLS_CC);
 	if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "OOl|l", &start, date_ce_interface, &interval, date_ce_interval, &recurrences, &options) == FAILURE) {
 		if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "OOO|l", &start, date_ce_interface, &interval, date_ce_interval, &end, date_ce_date, &options) == FAILURE) {
-			if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &isostr, &isostr_len, &options) == FAILURE) {
+			if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "S|l", &isostr, &isostr_len, &options) == FAILURE) {
 				php_error_docref(NULL TSRMLS_CC, E_WARNING, "This constructor accepts either (DateTimeInterface, DateInterval, int) OR (DateTimeInterface, DateInterval, DateTime) OR (string) as arguments.");
 				zend_restore_error_handling(&error_handling TSRMLS_CC);
 				return;