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Having trouble using the_title() and the_permalink() in a plugin
function slyd( $category, $slydcount ) {
    global $post;
    $tmp_post = $post;                      // Create $tmp_post to empty $post once Slyd is done with it

    $args = array(
        'category'      =>  $category,
        'numberposts'   =>  $slydcount
    );
    $slydposts = get_posts( $args );
    foreach( $slydposts as $post ) : setup_postdata($post);
        $post_permalink = the_permalink();  // Get the post's permalink
        $post_title = the_title();          // Get the post's title
        $post_content = the_content();      // Get the post's content - will write code to get excerpt later
        return '<h2><a href="' . $post_permalink . '">' . $post_title . '</a></h2>n'
        . '<p>' . $post_content . '</p>';
    endforeach;
    $post = $tmp_post;                      // Empty $post once Slyd is done with it
}

// Create the shortcode
function slyd_shortcode( $atts ) {
    // $atts        ::=     array of attributes
    // examples:            [slyd]
    //                      [slyd category='slide']
    //                      [slyd slydcount='5']
    //                      [slyd theme='default']

    /* Retrieve attributes set by the shortcode and set defaults for
    unregistered attributes. */
    extract( shortcode_atts( array(
        'category'      =>  '',             // Which category(s) to display posts from
        'slydcount'     =>  '5',            // How many Slyds to display
        'theme'         =>  'default'       // Which Slyd theme to use
    ), $atts ) );

    return "<p>category = {$category}, count = {$slydcount}</p>"
    . slyd( $category, $slydcount );
}

add_shortcode( 'slyd', 'slyd_shortcode' );

<?php the_title('', '', false); ?>

ob_start();
the_content();
$content = ob_get_clean();

$title = get_the_title()

$link = get_the_permalink()