How to fix this PHP code to prevent my site from crashing?

I added this code from WP-PageNavi to my child theme functions.php and it seems to break the site:

<?php

// WP-PageNavi

function twentytwelve_content_nav( $nav_id ) {
    global $wp_query;
    if ( $wp_query->max_num_pages > 1 ) : ?>
                <?php /* add wp-pagenavi support for posts */ ?>
        <?php if(function_exists(‘wp_pagenavi’) ) : ?>
            <?php wp_pagenavi(); ?>
            <br />
        <?php else: ?>
        <nav id="<?php echo $nav_id; ?>">
            <h3 class="assistive-text"><?php _e( ‘Post navigation’, ‘tto’ ); ?></h3>
            <div class="nav-previous"><?php next_posts_link( __( ‘<span>&larr;</span> Older posts’, ‘tto’ ) ); ?></div>
            <div class="nav-next"><?php previous_posts_link( __( ‘Newer posts <span>&larr;</span>’, ‘tto’ ) ); ?></div>
        </nav><!– #nav-above –>
    <?php endif; ?>
    <?php endif;
}

?>

this was my child theme functions.php before… which was working:

<?php

if ( ! function_exists( 'twentytwelve_entry_meta' ) ) :
/**
 * Set up post entry meta.
 *
 * Prints HTML with meta information for current post: categories, tags, permalink, author, and date.
 *
 * Create your own twentytwelve_entry_meta() to override in a child theme.
 *
 * @since Twenty Twelve 1.0
 *
 * @return void
 */
function twentytwelve_entry_meta() {
	// Translators: used between list items, there is a space after the comma.
	$categories_list = get_the_category_list( __( ', ', 'twentytwelve' ) );

	// Translators: used between list items, there is a space after the comma.
	$tag_list = get_the_tag_list( '', __( ', ', 'twentytwelve' ) );

	$date = sprintf( '<a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s">%4$s</time></a>',
		esc_url( get_permalink() ),
		esc_attr( get_the_time() ),
		esc_attr( get_the_date( 'c' ) ),
		esc_html( get_the_date() )
	);

	$author = sprintf( '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>',
		esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
		esc_attr( sprintf( __( 'View all posts by %s', 'twentytwelve' ), get_the_author() ) ),
		get_the_author()
	);

	// Translators: 1 is category, 2 is tag, 3 is the date and 4 is the author's name.
	if ( $tag_list ) {
		$utility_text = __( 'This entry was posted in %1$s and tagged %2$s<span class="by-author"> by %4$s</span>.', 'twentytwelve' );
	} elseif ( $categories_list ) {
		$utility_text = __( 'This entry was posted in %1$s<span class="by-author"> by %4$s</span>.', 'twentytwelve' );
	} else {
		$utility_text = __( 'This entry was posted<span class="by-author"> by %4$s</span>.', 'twentytwelve' );
	}

	printf(
		$utility_text,
		$categories_list,
		$tag_list,
		$date,
		$author
	);
}
endif;

?>