Site Crashed U_ILLEGAL_ARGUMENT_ERROR in IntlDateFormatter

[pilou2]

Hi Guys,
timezone-identifiers available from @lat instructions are listed at the end. The important for my case is Asia/Nicosia, Europe/Athens, which are available.( Running Joomla 4 system report, on same PHP, it shows also Europe/Nicosia and UTC as default timezone. Joomla has no problem with the PHP 8.1.1).

The actual timezone declared in php.ini is date.timezone = "Europe/Athens"

The Intl extension is also available.
I entered also in php.ini
[intl]
intl.default_locale = el_GR.UTF-8 which it had no effect on the issue.

Attached also screenshot From info.php


Asia/Aden, Asia/Almaty, Asia/Amman, Asia/Anadyr, Asia/Aqtau, Asia/Aqtobe, Asia/Ashgabat, Asia/Atyrau, Asia/Baghdad, Asia/Bahrain, Asia/Baku, Asia/Bangkok, Asia/Barnaul, Asia/Beirut, Asia/Bishkek, Asia/Brunei, Asia/Chita, Asia/Choibalsan, Asia/Colombo, Asia/Damascus, Asia/Dhaka, Asia/Dili, Asia/Dushanbe, Asia/Famagusta, Asia/Gaza, Asia/Hebron, Asia/Ho_Chi_Minh, Asia/Hong_Kong, Asia/Hovd, Asia/Irkutsk, Asia/Jakarta, Asia/Jayapura, Asia/Jerusalem, Asia/Kabul, Asia/Kamchatka, Asia/Karachi, Asia/Kathmandu, Asia/Khandyga, Asia/Kolkata, Asia/Krasnoyarsk, Asia/Kuala_Lumpur, Asia/Kuching, Asia/Kuwait, Asia/Macau, Asia/Magadan, Asia/Makassar, Asia/Manila, Asia/Muscat, Asia/Nicosia, Asia/Novokuznetsk, etc...., Europe/Amsterdam, Europe/Andorra, Europe/Astrakhan, Europe/Athens, Europe/Belgrade, etc....

It seems your PHP compilation is missing ICU timezone data.
Here is what I get (ICU TZData version):


In PHP there are two time zone objects, DateTimeZone that you tested with lat9 test and IntlTimeZone. Normally Intl DateFormatter can use both, but it is possible that when it is not explicitly written in code, default might be IntlTimeZone that uses ICU time zone data missing in your PHP.
This might be your problem, not 100% sure though.