How to contruct the background-image filename from a
value in one of the
OpenID PHP modules ?
For a single rule, you can get away with something like:
$wgHooks[ 'BeforePageDisplay' ][ ] = function ( &$out, &$skin ) {
$out->addHeadItem( 'openidstyle',
'<style>#openid_provider_Google_icon { background-image: url(' .
$wgExtensionAssetsPath .'/OpenID/skin/icons/Google_large.png); }
</style>' );
return true;
};