guess_timezone    536 ext/date/php_date.c static char* guess_timezone(const timelib_tzdb *tzdb TSRMLS_DC);
guess_timezone    897 ext/date/php_date.c 	php_info_print_table_row(2, "Default timezone", guess_timezone(tzdb TSRMLS_CC));
guess_timezone    992 ext/date/php_date.c 	tz = guess_timezone(DATE_TIMEZONEDB TSRMLS_CC);