Simple WordPress Google Ads Shortcode

/* ADD THIS TO YOUR functions.php FILE ----------------------------------------------------------------------------- */
function ten80_google_adsense( $attr, $content ) {
//  Variables for use in script -----------------------------------------------------------------------------------
    $pub_account    = 'pub-[your-account-number-here]';
    $size   = ( !isset( $attr['size'] ) ? $size = '300x250' : $size = $attr['size'] );
    $sizeA  = explode('x', $size);
    $sizeW  = $sizeA[0];
    $sizeH  = $sizeA[1];

//  Output the Google Ads block -----------------------------------------------------------------------------------
    echo '
        <script type="text/javascript">
            google_ad_client    = "'.$pub_account.'";
            google_ad_width     = '.$sizeW.';
            google_ad_height    = '.$sizeH.';
            google_ad_format    = "'.$size.'_as";
            google_ad_type      = "text_image";
            google_color_border = "FFFFFF";
            google_color_bg     = "0000FF";
            google_color_link   = "FFFFFF";
            google_color_text   = "000000";
            google_color_url    = "008000";
        </script>
        <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
    ';
}
add_shortcode('googleads', 'ten80_google_adsense');

/* CALL THE SHORTCODE LIKE THIS ------------------------------------------------------------------------------------ */
/*
Specify a banner size:  [googleads size="460x60"]
Defaults to 300x250:    [googleads]
*/