Tweet Button

Hi, I am putting a Tweet Button in my page.php file after the the loop.

This is my code:

<a href="https://twitter.com/share">
	<?php echo the_slug(); ?>" data-text="Check Out <?php echo get_the_title(); ?>" data-via="twitter" data-related="twitter">Tweet
</a>

<script>
!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');
</script>

The <?php echo the_slug(); ?> is where the error is.

This code is also in my functions file to get the slug:

function the_slug() {
        $post_data = get_post($post->ID, ARRAY_A);
	$slug = $post_data['post_name'];
	return $slug;
}

When the Tweet Button has been clicked, it correctly displays the url in the twitter popup window but when submitted, Twitter shows an error.

See example page here

I have included a screenshot of the Twitter Error Page on Page 1.