Answer by Will Voelcker for How to check is timezone identifier valid from code?
Just an addendum to Cal's excellent answer. I think the following might be even faster...function isValidTimezoneID($tzid) { if (empty($tzid)) { return false; } foreach (timezone_abbreviations_list()...
View ArticleAnswer by user2595120 for How to check is timezone identifier valid from code?
In case of php<5.3, how about this? public static function is_valid_timezone($timezone){ $now_timezone = @date_default_timezone_get(); $result = @date_default_timezone_set($timezone); if(...
View ArticleAnswer by gaRex for How to check is timezone identifier valid from code?
See in PHP sources on php_date.c and timezonemap.h that`s why I can say this is always in 101.111111% static info (but per php build).If you want to get it dynamically, use timezone_abbreviations_list...
View ArticleAnswer by sanmai for How to check is timezone identifier valid from code?
If you're on Linux most if not all information on timezones there stored at /usr/share/zoneinfo/. You can walk over them using is_file() and related functions. You can also parse the former files with...
View ArticleAnswer by Mel for How to check is timezone identifier valid from code?
I would research what changes the perfect array and use a basic caching mechanism (like store the array in a file, that you include and update when needed). You're currently optimizing building an...
View ArticleAnswer by Cal for How to check is timezone identifier valid from code?
You solution works fine, so if it's speed you're looking for I would look more closely at what you're doing with your arrays. I've timed a few thousand trials to get reasonable average times, and these...
View ArticleAnswer by Anomie for How to check is timezone identifier valid from code?
When I tried this on a Linux system running 5.3.6, your Example #2 gave me 411 zones and Example #3 gave 496. The following slight modification to Example #2 gives me 591:$zoneList =...
View ArticleAnswer by hectorct for How to check is timezone identifier valid from code?
Why not use @ operator?This code works pretty well, and you don't change default timezone:function isValidTimezoneId($timezoneId) { @$tz=timezone_open($timezoneId); return $tz!==FALSE;}If you don't...
View ArticleHow to check is timezone identifier valid from code?
I'll try to explain what's the problem here.According to list of supported timezones from PHP manual, I can see all valid TZ identifiers in PHP.My first question is how to get that list from code but...
View Article
