vurl.php

<?
/**
* Some versioned URL's for cache busting when we push new changes up
* Only need the file name, paths will resolve appropriately in the
* $file_path variable
* Usage: <?= vurl('myfile.js'); ?>
*
* @param $file {String} The file - eg. 'file.js' or 'file.css'
* @param $type {String} We can optionally specify a type (probably not needed)
*/

function vurl($file, $type = ''){
    
    $root = get_bloginfo('template_directory');
    $template_path = TEMPLATEPATH;
    
    // We haven't specified a type, get the file extension to determine type
    if(!$type){
        $type = end(explode('.', $file));
    }
    
    // In this case, our path's are auto set to mysite.com/wp-content/themes/mytheme/{type}/{file}
    $file_path = '/' . $type . '/' . $file;
    $abs_file = $template_path . $file_path;
    
    $types_tags = array(
        'js' => '<script type="text/javascript" src="%s"></script>',
        'css' => '<link rel="stylesheet" type="text/css" href="%s" />'
    );
    
    if(!file_exists($abs_file) || !isset($types_tags[$type])){
        return false;
    }
    
    $cache_qs = '?' . filemtime($abs_file);
    $tag_out = sprintf($types_tags[$type], $root . $file_path . $cache_qs) . "\n";
    
    return $tag_out;
    
}
?>