# this breaks strtotime().
$modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
$modsinceTime = strtotime( $modsince );
- $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
+ $ismodsince = wfTimestamp( TS_MW, $modsinceTime ?: 1 );
wfDebug( "$fname: -- client send If-Modified-Since: $modsince", 'private' );
wfDebug( "$fname: -- we might send Last-Modified : $lastmod", 'private' );