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How to Create a Google Maps Shortcode

To demonstrate how easy it is to build custom shortcodes, we'll build one to display a Google Map based on a provided address. We want our CMS authors to be able to embed the map using the following code:

[googlemap,width=500,height=300]97-99 Courtenay Place, Wellington, New Zealand[/googlemap]

So we've got the address as "content" of our new googlemap shortcode tags, plus some width and height arguments. We'll add defaults to those in our shortcode parser so they're optional.

mysite/_config.php

ShortcodeParser::get('default')->register('googlemap', function($arguments, $address, $parser, $shortcode) {
    $iframeUrl = sprintf(
        'http://maps.google.com/maps?q=%s&hnear=%s&ie=UTF8&hq=&t=m&z=14&output=embed',
        urlencode($address),
        urlencode($address)
    );

    $width = (isset($arguments['width']) && $arguments['width']) ? $arguments['width'] : 400;
    $height = (isset($arguments['height']) && $arguments['height']) ? $arguments['height'] : 300;

    return sprintf(
        '<iframe width="%d" height="%d" src="%s" frameborder="0" scrolling="no" marginheight="0" marginwidth="0"></iframe>',
        $width,
        $height,
        $iframeUrl
    );
});

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