Allow the third arg to DateTime(Immutable)::createFromFormat() to be null.

Permit the same meaning as not passing the arg at all.

Author: sgolemon

ext/date/php_date.c

@@ -2628,7 +2628,7 @@ PHP_FUNCTION(date_create_from_format)
 	size_t             time_str_len = 0, format_str_len = 0;
 	zval            datetime_object;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|O", &format_str, &format_str_len, &time_str, &time_str_len, &timezone_object, date_ce_timezone) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|O!", &format_str, &format_str_len, &time_str, &time_str_len, &timezone_object, date_ce_timezone) == FAILURE) {
 		RETURN_FALSE;
 	}
 
@@ -2651,7 +2651,7 @@ PHP_FUNCTION(date_create_immutable_from_format)
 	size_t          time_str_len = 0, format_str_len = 0;
 	zval            datetime_object;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|O", &format_str, &format_str_len, &time_str, &time_str_len, &timezone_object, date_ce_timezone) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|O!", &format_str, &format_str_len, &time_str, &time_str_len, &timezone_object, date_ce_timezone) == FAILURE) {
 		RETURN_FALSE;
 	}
 

ext/date/tests/bug68669.phpt

@@ -0,0 +1,25 @@
+--TEST--
+DateTime::createFromFormat() does not allow NULL $timezone
+--FILE--
+<?php
+
+date_default_timezone_set('America/Los_Angeles');
+var_dump(DateTime::createFromFormat('Y/m/d H:i:s', '1995/06/08 12:34:56', null));
+var_dump(DateTimeImmutable::createFromFormat('Y/m/d H:i:s', '1995/06/08 12:34:56', null));
+--EXPECT--
+object(DateTime)#1 (3) {
+  ["date"]=>
+  string(26) "1995-06-08 12:34:56.000000"
+  ["timezone_type"]=>
+  int(3)
+  ["timezone"]=>
+  string(19) "America/Los_Angeles"
+}
+object(DateTimeImmutable)#1 (3) {
+  ["date"]=>
+  string(26) "1995-06-08 12:34:56.000000"
+  ["timezone_type"]=>
+  int(3)
+  ["timezone"]=>
+  string(19) "America/Los_Angeles"
+}