[DOC-CVS] [doc-en] master: Add compatibility note to 'c' date format (#4847)

Author: Martin Melka (melkamar)
Committer: GitHub (web-flow)
Pusher: Crell
Date: 2025-10-03T10:04:59-05:00

Commit: https://github.com/php/doc-en/commit/7d78942045456715efcc7d54e56096d4187dda3c
Raw diff: https://github.com/php/doc-en/commit/7d78942045456715efcc7d54e56096d4187dda3c.diff

Add compatibility note to 'c' date format (#4847)

The 'c' format produces invalid ISO8601 dates for years 10000
and above. This is not necessarily wrong, but the documentation
should warn about this explicitly.

Changed paths:
  M  reference/datetime/datetimeinterface/format.xml


Diff:

diff --git a/reference/datetime/datetimeinterface/format.xml b/reference/datetime/datetimeinterface/format.xml
index c22d0c467f74..39a49ecbf57b 100644
--- a/reference/datetime/datetimeinterface/format.xml
+++ b/reference/datetime/datetimeinterface/format.xml
@@ -321,7 +321,7 @@
          </row>
          <row>
           <entry><literal>c</literal></entry>
-          <entry>ISO 8601 date</entry>
+          <entry>ISO 8601 date. Only compatible with the non-expanded format (up to year 9999). Later dates will result in an invalid string. For later dates and expanded format, see <literal>x</literal> and <literal>X</literal>.</entry>
           <entry>2004-02-12T15:19:21+00:00</entry>
          </row>
          <row>