Quattro piccoli consigli da utilizzare quando si crea un tema wordpress

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<?php get_header() ?>
<?php get_sidebar() ?>
<?php get_footer() ?>

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if ( function_exists('register_sidebar') ) {
register_sidebar(array(
'name'=>'sidebar',
'before_widget' => '',
'after_widget' => '</li>',
'before_title' => '',
'after_title' => '</h3>',
));
}

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<!-- Start the Loop. -->
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<!-- The following tests if the current post is in category 3. -->
<!-- If it is, the div box is given the CSS class "post-cat-three". -->
<!-- Otherwise, the div box will be given the CSS class "post". -->
<?php if ( in_category('3') ) { ?>
<div class="post-cat-three">
<?php } else { ?>
<div class="post">
<?php } ?>
<!-- Display the Title as a link to the Post's permalink. -->
<h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
<!-- Display the date (November 16th, 2009 format) and a link to other posts by this posts author. -->
<small><?php the_time('F jS, Y') ?> by <?php the_author_posts_link() ?></small>
<!-- Display the Post's Content in a div box. -->
v class="entry">
<strong><?php the_content(); ?></strong>
</div>
<!-- Display a comma separated list of the Post's Categories. -->
class="postmetadata">Posted in <?php the_category(', '); ?>
</div> <!-- closes the first div box -->
<!-- Stop The Loop (but note the "else:" - see next line). -->
<?php endwhile; else: ?>
<!-- The very first "if" tested to see if there were any Posts to -->
<!-- display.&nbsp; This "else" part tells what do if there weren't any. -->
Sorry, no posts matched your criteria.
<!-- REALLY stop The Loop. -->
<?php endif; ?>

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<?php the_content(); ?> 

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<strong><?php the_excerpt(__('Read more',False));?></strong>

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<?php
//Ottimizzazione SEO
function add_meta_tag(){
global $wp_query;
$post = $wp_query->get_queried_object();
$desc = get_bloginfo('description');
$KeywordsAssociated = "LE KEYWORDS DI DEFAULT";
$keys = $KeywordsAssociated ;
if(is_single() || is_page()){
$desc = cut($post->post_content, 25);
}
if(is_single()){
$keywords = array();
$tags = get_the_tags($post->ID);
$categories = get_the_category($post->ID);
if(is_array($tags)){
foreach ($tags as $tag)
$keywords[] = $tag->name;
}
if(is_array($categories)){
foreach ($categories as $category)
$keywords[] = $category->cat_name;
}
$keys = implode(", ", $keywords);
}
if(is_category()){
$desc = strip_tags(category_description());
}
$desc = str_replace(array("n","r","t"), " ", $desc);
$desc = str_replace('"', "'", $desc);
echo '<meta name="description" content="' . $desc . '" />' . "n";
echo '<meta name="keywords" content="'. $keys . '" />' . "n";
}
add_action('wp_head', 'add_meta_tag');
function cut($content, $cut = 0, $encode_html = 0) {
if ( $cut &amp;&amp; !$encode_html )
$encode_html = 2;
if ( 1== $encode_html ) {
$content = wp_specialchars($content);
$cut = 0;
} elseif ( 0 == $encode_html ) {
$content = make_url_footnote($content);
} elseif ( 2 == $encode_html ) {
$content = strip_tags($content);
}
if ( $cut ) {
$blah = explode(' ', $content);
if ( count($blah) > $cut ) {
$k = $cut;
$use_dotdotdot = 1;
} else {
$k = count($blah);
$use_dotdotdot = 0;
}
for ( $i=0; $i<$k; $i++ )
$excerpt .= $blah[$i].' ';
$excerpt .= ($use_dotdotdot) ? '...' : '';
$content = $excerpt;
}
$content = str_replace(']]>', ']]&amp;gt;', $content);
return $content;
}
?>

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<title>
<?php
wp_title('');
if (function_exists('is_tag') and is_tag()) { ?>
Tag per <?php echo $tag;
}
if (is_archive()) { ?>
Archivio <?php
} elseif (is_search()) { ?>
Ricerca per <?php echo wp_specialchars($s,1);
}
if ( !(is_404()) &amp;&amp; (is_search()) or (is_single()) or (is_page()) or (function_exists('is_tag') and is_tag()) or (is_archive()) ) { ?>
| <?php
} ?>
<?php bloginfo('name');
if(is_home()){ ?>
- <?php bloginfo('description');
}
?>
</title>

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<?php
$page_id = "XXXXXXXXXXXX";
$xml = @simplexml_load_file("http://api.facebook.com/restserver.php?method=facebook.fql.query&amp;query=SELECT%20fan_count%20FROM%20page%20WHERE%20page_id=".$page_id."") or die ("a lot");
$fans = $xml->page->fan_count;
echo $fans;
?>