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<title>[54237] trunk/src/wp-admin/options-general.php: Date/Time: Minor tweak to support deprecated timezones on General Settings screen.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/54237">54237</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/54237","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-09-20 01:37:59 +0000 (Tue, 20 Sep 2022)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Date/Time: Minor tweak to support deprecated timezones on General Settings screen.
Underneath the timezone selector on the General Settings screen, a small snippet of info about the selected time zone is displayed.
This information would be missing if the timezone is set to a deprecated timezone value, even though PHP is perfectly capable of generating that information, including for deprecated timezones.
By passing the `DateTimeZone::ALL_WITH_BC` constant as the `$timezoneGroup` parameter to the PHP native `timezone_identifiers_list()` function, a timezone name list is retrieved containing both current and deprecated timezone names, preventing the condition from failing when the current timezone is a deprecated one.
See the extensive write-up about this in ticket <a href="https://core.trac.wordpress.org/ticket/56468">#56468</a>.
Also see: [https://www.php.net/manual/en/datetimezone.listidentifiers.php PHP Manual: timezone_identifiers_list()].
Note: As this is an admin/output page, no pre-existing tests are available.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/54207">[54207]</a>, <a href="https://core.trac.wordpress.org/changeset/54217">[54217]</a>, <a href="https://core.trac.wordpress.org/changeset/54227">[54227]</a>, <a href="https://core.trac.wordpress.org/changeset/54229">[54229]</a>, <a href="https://core.trac.wordpress.org/changeset/54230">[54230]</a>, <a href="https://core.trac.wordpress.org/changeset/54232">[54232]</a>, <a href="https://core.trac.wordpress.org/changeset/54233">[54233]</a>.
Props jrf, costdev, marcyoast.
See <a href="https://core.trac.wordpress.org/ticket/56468">#56468</a>.</pre>
<h3>Modified Paths</h3>
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<li><a href="#trunksrcwpadminoptionsgeneralphp">trunk/src/wp-admin/options-general.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpadminoptionsgeneralphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/options-general.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/options-general.php 2022-09-20 01:34:49 UTC (rev 54236)
+++ trunk/src/wp-admin/options-general.php 2022-09-20 01:37:59 UTC (rev 54237)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -285,7 +285,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> <br />
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( in_array( $tzstring, timezone_identifiers_list(), true ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( in_array( $tzstring, timezone_identifiers_list( DateTimeZone::ALL_WITH_BC ), true ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $transitions = timezone_transitions_get( timezone_open( $tzstring ), time() );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // 0 index is the state at current time, 1 index is the next transition, if any.
</span></span></pre>
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