[Wikitech-l] ResourceLoader support question: how to construct a value in CSS from PHP

[Thomas Gries]

The extension OpenID loads a CSS file via RL:

$myResourceTemplate = array(
    'localBasePath' => $path . '/skin',
    'remoteExtPath' => 'OpenID/skin',
    'group' => 'ext.openid',
);
...
$wgResourceModules['ext.openid.icons'] = $myResourceTemplate + array(
    'styles' => 'openid.css',
    'dependencies' => array(
        'ext.openid'
    )
);


openid.css comprises lines such as
#openid_provider_OpenID_icon { /*@embed*/background-image:
url(icons/OpenID_large.png); }


Question:
=========
How to contruct the background-image filename from a value in one of the
OpenID PHP modules ?


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