syntax error, unexpected T_STRING in

Question

function socialbutton($content) {
    if(is_single()) {
            $content.= '
     <div class="author_info">
    <h4>This post was written by <?php the_author_posts_link(); ?></h4>
    <span class="author_photo"><?php echo get_avatar( get_the_author_id() , 96 ); ?></span>
    <p><?php the_author(); ?> &ndash; who has written <?php the_author_posts(); ?> posts on <a href="<?php bloginfo('home'); ?>"><?php bloginfo('name'); ?></a>.</p>
    <p><?php the_author_description(); ?></p>
    <p class="author_email"><a href="mailto:<?php the_author_email(); ?>" title="Send an Email to the Author of this Post">Contact the author</a></p>
    </div>'; 
    }
    return $content;
    }add_filter ('the_content', 'socialbutton');

When I add the code above to function.php, it shows

Parse error: syntax error, unexpected T_STRING in XXXXXX on line 10

How to solve this problem?

Answer 1

You need to escape your single quotes on the author line, or use double quotes instead. For example, change to:

<a href="<?php bloginfo(\'home\'); ?>"><?php bloginfo(\'name\'); ?>

or

<a href="<?php bloginfo("home"); ?>"><?php bloginfo("name"); ?>

This is because you started your output string with single quotes, and so it is ending the HTML content to insert too soon.