Bug #79863 [Opn]: Timezone conversion result depends on environment

Edit report at https://bugs.php.net/bug.php?id=79863&edit=1 ID: 79863 User updated by: bassjoe at web dot de Reported by: bassjoe at web dot de Summary: Timezone conversion result depends on environment Status: Open Type: Bug Package: Date/time related Operating System: CentOS Linux 7 PHP Version: 7.4.8 Block user comment: N Private report: N New Comment: Now this is very strange. I get the correct result if I check out PHP 7.4.8 (same version as the REMI packages) from Git, compile it on CentOS 7, and run this php executable on the server. So in the same environment and while ignoring php.ini (with -n) I get different results for the same version. # installed from remi repo: # php-cli-7.4.8-2.el7.remi.x86_64 # php-7.4.8-2.el7.remi.x86_64 $ php --version PHP 7.4.8 (cli) (built: Jul 9 2020 08:57:23) ( NTS ) Copyright (c) The PHP Group Zend Engine v3.4.0, Copyright (c) Zend Technologies $ php -n -r '$datetime = date_create("2020-07-13 10:38:15", new DateTimeZone("Europe/Berlin")); var_dump($datetime); $datetime->setTimezone( new DateTimeZone( "UTC" ) ); var_dump($datetime);' object(DateTime)#2 (3) { ["date"]=> string(26) "2020-07-13 10:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } object(DateTime)#2 (3) { ["date"]=> string(26) "2020-07-13 10:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } # self-compiled on centos 7 => correct result $ sapi/cli/php --version PHP 7.4.8 (cli) (built: Jul 25 2020 22:12:24) ( NTS ) Copyright (c) The PHP Group Zend Engine v3.4.0, Copyright (c) Zend Technologies $ sapi/cli/php -n -r '$datetime = date_create("2020-07-13 10:38:15", new DateTimeZone("Europe/Berlin")); var_dump($datetime); $datetime->setTimezone( new DateTimeZone( "UTC" ) ); var_dump($datetime);' object(DateTime)#2 (3) { ["date"]=> string(26) "2020-07-13 10:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Berlin" } object(DateTime)#2 (3) { ["date"]=> string(26) "2020-07-13 08:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } Previous Comments: ------------------------------------------------------------------------ [2020-07-17 19:21:22] bassjoe at web dot de The result is the same with this command sequence. Workstation (correct): $ php -r '$datetime = date_create("2020-07-13 10:38:15", timezone_open("Europe/Berlin")); date_timezone_set( $datetime, timezone_open( "UTC" ) ); date_format( $datetime, "Y-m-d H:i:s" ); var_dump($datetime);' Command line code:1: class DateTime#2 (3) { public $date => string(26) "2020-07-13 08:38:15.000000" public $timezone_type => int(3) public $timezone => string(3) "UTC" } Server (wrong): $ php -r '$datetime = date_create("2020-07-13 10:38:15", timezone_open("Europe/Berlin")); date_timezone_set( $datetime, timezone_open( "UTC" ) ); date_format( $datetime, "Y-m-d H:i:s" ); var_dump($datetime);' object(DateTime)#2 (3) { ["date"]=> string(26) "2020-07-13 10:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } ------------------------------------------------------------------------ [2020-07-17 13:37:58] antonino dot spampinato86 at gmail dot com <?php $datetime = date_create("2020-07-13 10:38:15", timezone_open("Europe/Berlin")); date_timezone_set( $datetime, timezone_open( "UTC" ) ); date_format( $datetime, "Y-m-d H:i:s" ); var_dump($datetime); Expected result: ---------------- object(DateTime)#5 (3) { ["date"]=> string(26) "2020-07-13 08:38:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } timezone now is UTC? ------------------------------------------------------------------------ [2020-07-15 09:22:20] bassjoe at web dot de wp_timezone()->getName() is what I logged and it was "Europe/Berlin" ------------------------------------------------------------------------ [2020-07-15 09:17:27] bassjoe at web dot de "Europe/Berlin" ------------------------------------------------------------------------ [2020-07-15 09:10:22] requinix@php.net What is the value being returned by wp_timezone()? ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=79863 -- Edit this bug report at https://bugs.php.net/bug.php?id=79863&edit=1