Make embed codes responsive

responsive_embed.css

.embed-wrap {
    position: relative;
    padding-top: 25px; /* IE6 workaround*/
    height: 0;

	object, embed, iframe {
		position: absolute;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
	}
}

responsive_embed.php

    function resize_embed($embed) {

		$embed_width_matches = array();
		$embed_height_matches = array();
		preg_match('/width=\"([0-9]+)\"/', $embed, $embed_width_matches);
		preg_match('/height=\"([0-9]+)\"/', $embed, $embed_height_matches);

		$embed_width = intval($embed_width_matches[1]);
		$embed_height = intval($embed_height_matches[1]);

		$pad_bot = intval(($embed_height / $embed_width) * 100);

		$embed = preg_replace(
			array('/width=\"[0-9]+\"/', '/height=\"[0-9]+\"/' ),
			array('', ''),
			$embed
		);

		return '<div class="embed-wrap" style="padding-bottom: ' . $pad_bot . '%">' . $embed . '</div>';
	}