LogEventsList: Don't output '0000-00-00' as default date

It is an invalid value that should be (by spec) ignored by the
browser, but apparently some browsers don't ignore it, and when they
submit it back, it is converted to -0001-11-30 by our date parsing.

Bug: T209490
Change-Id: I2643767a0091c1c9db78706358903e1dc97b59d1

diff --git a/includes/logging/LogEventsList.php b/includes/logging/LogEventsList.php
index a5aa687..7317367 100644 (file)
--- a/includes/logging/LogEventsList.php
+++ b/includes/logging/LogEventsList.php
@@ -148,7 +148,7 @@ class LogEventsList extends ContextSource {
                $formDescriptor['date'] = [
                        'type' => 'date',
                        'label-message' => 'date',
-                       'default' => sprintf( "%04d-%02d-%02d", $year, $month, $day ),
+                       'default' => $year && $month && $day ? sprintf( "%04d-%02d-%02d", $year, $month, $day ) : '',
                ];
 
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