chrisguitarguy/iframe-widget.php

## iframe-widget.php
<?php
/*
Plugin Name: iFrame Your WP
Description: Allow people to embed your latest posts in an iFrame
Author: Christopher Davis
Author URI: http://www.christopherguitar.me
License: GPL2
*/

register_activation_hook( __FILE__ , 'wpse32725_activation' );
/**
 * Activation hook to flush rewrite rules
 *
 * @uses flush_rewrite_rules
 */
function wpse32725_activation()
{
    flush_rewrite_rules();
}

add_action( 'init', 'wpse32725_add_rewrite' );
/**
 * Adds the rewrite rule for our iframe
 *
 * @uses add_rewrite_rule
 */
function wpse32725_add_rewrite()
{
    add_rewrite_rule(
        '^iframe$',
        'index.php?iframe=true',
        'top'
    );

    // shortcode for our iframe
    add_shortcode( 'iframe-code', 'wpse32725_iframe_code' );
}

add_filter( 'query_vars', 'wpse32725_filter_vars' );
/**
 * adds our iframe query variable so WP knows what it is and doesn't
 * just strip it out
 */
function wpse32725_filter_vars( $vars )
{
    $vars[] = 'iframe';
    return $vars;
}

add_action( 'template_redirect', 'wpse32725_catch_iframe' );
/**
 * Catches our iframe query variable.  If it's there, we'll stop the
 * rest of WP from loading and do our thing.  If not, everything will
 * continue on its merry way.
 *
 * @uses get_query_var
 * @uses get_posts
 */
function wpse32725_catch_iframe()
{
    // no iframe? bail
    if( ! get_query_var( 'iframe' ) ) return;

    // Here we can do whatever need to do to display our iframe.
    // this is a quick example, but maybe a better idea would be to include
    // a file that contains your template for this?
    $posts = get_posts( array( 'numberposts' => 5 ) );
    ?>
    <!doctype html>
    <html <?php language_attributes(); ?>>
    <head>
        <?php /* stylesheets and such here */ ?>
    </head>
    <body>
        <ul>
            <?php foreach( $posts as $p ): ?>
                <li>
                    <a href="<?php echo esc_url( get_permalink( $p ) ); ?>"><?php echo esc_html( $p->post_title ); ?></a>
                </li>
            <?php endforeach; ?>
        <ul>
    </body>
    </html>
    <?php
    // finally, call exit(); and stop wp from finishing (eg. loading the
    // templates
    exit();
}

function wpse32725_iframe_code()
{
    return sprintf(
        '<code>&lt;iframe src="%s"&gt;&lt;/iframe&gt;</code>',
        esc_url( home_url('/iframe/') )
    );
}
	<?php
	/*
	Plugin Name: iFrame Your WP
	Description: Allow people to embed your latest posts in an iFrame
	Author: Christopher Davis
	Author URI: http://www.christopherguitar.me
	License: GPL2
	*/

	register_activation_hook( __FILE__ , 'wpse32725_activation' );
	/**
	* Activation hook to flush rewrite rules
	*
	* @uses flush_rewrite_rules
	*/
	function wpse32725_activation()
	{
	flush_rewrite_rules();
	}

	add_action( 'init', 'wpse32725_add_rewrite' );
	/**
	* Adds the rewrite rule for our iframe
	*
	* @uses add_rewrite_rule
	*/
	function wpse32725_add_rewrite()
	{
	add_rewrite_rule(
	'^iframe$',
	'index.php?iframe=true',
	'top'
	);

	// shortcode for our iframe
	add_shortcode( 'iframe-code', 'wpse32725_iframe_code' );
	}

	add_filter( 'query_vars', 'wpse32725_filter_vars' );
	/**
	* adds our iframe query variable so WP knows what it is and doesn't
	* just strip it out
	*/
	function wpse32725_filter_vars( $vars )
	{
	$vars[] = 'iframe';
	return $vars;
	}

	add_action( 'template_redirect', 'wpse32725_catch_iframe' );
	/**
	* Catches our iframe query variable. If it's there, we'll stop the
	* rest of WP from loading and do our thing. If not, everything will
	* continue on its merry way.
	*
	* @uses get_query_var
	* @uses get_posts
	*/
	function wpse32725_catch_iframe()
	{
	// no iframe? bail
	if( ! get_query_var( 'iframe' ) ) return;

	// Here we can do whatever need to do to display our iframe.
	// this is a quick example, but maybe a better idea would be to include
	// a file that contains your template for this?
	$posts = get_posts( array( 'numberposts' => 5 ) );
	?>
	<!doctype html>
	<html <?php language_attributes(); ?>>
	<head>
	<?php /* stylesheets and such here */ ?>
	</head>
	<body>
	<ul>
	<?php foreach( $posts as $p ): ?>
	<li>
	<a href="<?php echo esc_url( get_permalink( $p ) ); ?>"><?php echo esc_html( $p->post_title ); ?></a>
	</li>
	<?php endforeach; ?>
	<ul>
	</body>
	</html>
	<?php
	// finally, call exit(); and stop wp from finishing (eg. loading the
	// templates
	exit();
	}

	function wpse32725_iframe_code()
	{
	return sprintf(
	'<code><iframe src="%s"></iframe></code>',
	esc_url( home_url('/iframe/') )
	);
	}