为什么我不能在WordPress中将the_permalink（）与echo一起使用？

Question

I have the following code:

<?php
    query_posts(array(
        'posts_per_page'   => -1,
        'post_type' => 'sample-letter',
        'order' => 'ASC'
    ));

    while(have_posts()){
        the_post();

        echo '<div class="col-md-9"><span class="title"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">title</a></span><br />';
    }

    wp_reset_query();
?>

It works great but the problem is, I can't use:

<?php the_permalink() ?>

INSIDE the echo statement. It is a simple link, and rather than render the link url, it outputs:

http://sitename.com/<?php the_permalink() ?>

Instead of:

http://sitename.com/thelink

How can I make this loop work without the echo ? Is that actually the problem at all?

Answer 1

Use the echo part like;

echo '<div class="col-md-9"><span class="title"><a href="' . the_permalink() . '" rel="bookmark" title="Permanent Link to ' . the_title_attribute() . '">title</a></span><br />';

or you can use;

$current_post_id = get_the_ID(); // id of current post in the loop
$permalink = get_permalink( $current_post_id );
$title = get_the_title( $current_post_id );

echo '<div class="col-md-9"><span class="title"><a href="' . $permalink . '" rel="bookmark" title="Permanent Link to ' . $title . '">' . $title . '</a></span><br />';