The WordPress site currently powers over 60 million websites and read by over a quarter of a billion users every month.When survey website W3Techs conducted a survey, it was found that 17% of the world’s websites are powered by WordPress.

While the attack may only succeed a small percentage of the time, the attack could result in hundreds or thousands of compromised servers when averaged over tens of thousands of sites powered by WordPress software.

I recommend following solutions for handling this issue
Change your WordPress admin Username

We can use the following article for changing the admin username
http://www.digitalkonline.com/blog/change-your-wordpress-admin-username/

Update wordpress version
WordPress founder Matt Mullenweg advises that if you do these first three “you’ll be ahead of 99% of sites out there and probably never have a problem.”

Use the Better WP Security plugin
As most WordPress attacks are a result of plugin vulnerabilities, weak passwords, and obsolete software. Better WP Security will hide the places those vulnerabilities live keeping an attacker from learning too much about your site and keeping them away from sensitive areas like login, admin, etc.Better WP Security takes the best WordPress security features and techniques and combines them in a single plugin thereby ensuring that as many security holes as possible are patched without having to worry about conflicting features or the possibility of missing anything on your site.

With one-click activation for most features as well as advanced features for experienced users Better WP Security can help protect any site.
http://wordpress.org/plugins/better-wp-security/

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If you want to shorthand the get_post_meta call for the current post then you can use following:
you can use above method through functions.php file. You need to put following code in file:

function get_current_post_meta($key,$postID=null){
if(empty($postID)) {
global $post;
return get_post_meta($post->ID,$key,true);
} else {
return get_post_meta($postID,$key,true);
}
}

and you can call it like this:

echo get_current_post_meta('custom_tags');

Using above method you can pass the post id also.

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WordPress really did something messy in this release.

I downgraded my wordpress 3.5 to 3.4.2 wordpress release. Now my sites are stable.
I took help from following articles.

http://iblog4dollars.com/2013/01/02/wordpress-problems-how-to-downgrade-from-wordpress-3-5/

Some points are not mentioned in above article. Which is as follows:
Keep your wp-config.php, .htaccess and robots.txt file
Do not forget about sitemap.xml files.

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You can refer following articles.

1. Best wordpress plugins for wordpress security and protection
2. wordpress plugins for stats or statistics
3. 16 Best WordPress Plugins which every WordPress Blog Should install

If you use many plugins then slow down the site

You have more then 30+ plugins then that plugin will execute the extra sql quries while opening each and every page. Depends on your wordpress plugins which is installed on your site. your site load slowly.

Some free plugins will ad the unnecessary code in your site

Some wordpress plugins add the some unnecessary javascript and PHP code to your site. Some plugins will use your site for there advertising purpose. So first check the plugin review.

Some wordpress plugins are not safe to install

Some wordpress plugins are not secure to install in site. It may cause the security issue. Some plugins are easy target for hackers. You should read the some review about plugin before start using in your site.

Some wordpress plugin will cause issues in your site

Before installing the wordpress plugins you should create development or test site and on development site you should first try to install the new wordpress plugins. After that you should install on current site. Some plugins will cause the jquery conflicts in your site.

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For that we can use following code.

add_action('wp_enqueue_scripts','Load_Template_Scripts_wpapi');
function Load_Template_Scripts_wpapi(){
    if ( is_page_template('custom-page.php') ) {
        wp_enqueue_script('my-script', 'path/to/script.js');
    }
}

For loading any script or any custom code you can use above action in wordpress. Above code you need to add in functions.php file. Which you can find in your wordpress theme folder.

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Some time we want use category images for show the category content. Some time we want use the category wise background images in your website.

For category images you can use the some nice wordpress plugins.

• Categories Images

The Categories Images Plugin allow you to add image with category or taxonomy.

• Category and Page Icons

Using this plugin, you can add icons (images) to sidebar of your site or blog into section of categories and pages.

For category background images you need know about body_class() method. Detailed information you can find on following page.

Body_class()

If you have wpapi category then you can use following CSS.

• If they are there, you can use these as selectors in your CSS: body.category-wpapi { /* code here */ }, etc.
• If not, add the body_class() function to the <body> tag in your theme, probably located in header.php. It works like this:
  <body <?php body_class(); ?>>

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I already written about custom post type. If you want to know about custom post type in detail then you can use following articles.

• Create custom post type with permalink
• How to add the custom post type with associated tags and category
• How to use the custom post type in wordpress
• Add tags support in custom post type
• File upload with add_meta_box or custom_post_type in wordpress

Here in this tutorial I showed How to save the meta data for your custom post type.

add_action( 'add_meta_boxes', 'job_detail_box' );

function job_detail_box() {
add_meta_box(
'job_detail_box',
__( 'job Detail', 'myplugin_textdomain' ),
'job_detail_box_content',
'job',
'normal',
'high'
);
}

function job_detail_box_content( $post ) {
// No need to globalise a post that is an argument on this callback
$meta_p = get_post_meta($post->ID, "jobs_price", true);
$meta_l = get_post_meta($post->ID, "jobs_location", true);

echo '<input type="hidden" name="jobs-nonce" id="jobs-nonce" value="' . wp_create_nonce( 'jobs-nonce' ) . '" />';

?>
<div>
<ul>
<li><label>job Price</label><input name="jobs_price" value="<?php echo $meta_p; ?>" /></li>
<li><label>job Location</label><input name="jobs_location" size="50" value="<?php echo $meta_l; ?>" /></li>
</ul>
</div>
<?php
}

add_action ('save_post', 'save_jobs');

// The save_post hook provides the post id to the return function
function save_jobs( $post_id ){

if ( !wp_verify_nonce( $_POST['jobs-nonce'], 'jobs-nonce' )) {
return $post_id;
}

if ( !current_user_can( 'edit_post', $post_id ))
return $post_id;

update_post_meta($post_id, "jobs_price", $POST['jobs_price'] );
update_post_meta($post_id, "jobs_location", $POST['jobs_location'] );
}

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For SEO of your site deleting spam word comments is good.

Here are some steps for protecting your wordpress site.

You may copy and paste the following list to the Comment Moderation box in your wp-admin/options-discussions.php page:

• -online
• 4u
• adipex
• advicer
• baccarrat
• blackjack
• bllogspot
• booker
• byob
• car-rental-e-site
• car-rentals-e-site
• carisoprodol
• casino
• casinos
• chatroom
• cialis
• coolcoolhu
• coolhu
• credit-card-debt
• credit-report-4u
• cwas
• cyclen
• cyclobenzaprine
• dating-e-site
• day-trading
• debt-consolidation
• debt-consolidation-consultant
• discreetordering
• duty-free
• dutyfree
• equityloans
• fioricet
• flowers-leading-site
• freenet-shopping
• freenet
• gambling-
• hair-loss
• health-insurancedeals-4u
• homeequityloans
• homefinance
• holdem
• holdempoker
• holdemsoftware
• holdemtexasturbowilson
• hotel-dealse-site
• hotele-site
• hotelse-site
• incest
• insurance-quotesdeals-4u
• insurancedeals-4u
• jrcreations
• levitra
• macinstruct
• mortgage-4-u
• mortgagequotes
• online-gambling
• onlinegambling-4u
• ottawavalleyag
• ownsthis
• palm-texas-holdem-game
• paxil
• penis
• pharmacy
• phentermine
• poker-chip
• poze
• pussy
• rental-car-e-site
• ringtones
• roulette
• shemale
• shoes
• slot-machine
• texas-holdem
• thorcarlson
• top-site
• top-e-site
• tramadol
• trim-spa
• ultram
• valeofglamorganconservatives
• viagra
• vioxx
• xanax
• zolus

There are some nice plugins also which is helpful for protecting your site from spam comments.
You should activate the Akismet wordpress plugin.
Akismet is quite possibly the best way in the world to protect your blog from comment and trackback spam. It keeps your site protected from spam even while you sleep.

You should check the following option from wordpress:

Before a comment appears: (Options)

1. Before a comment appears An administrator must always approve the comment
2. Comment author must have a previously approved comment

If you have many spam word comments in your site then you should use sql query for delete the spam comments.

DELETE FROM wp_comments WHERE comment_content LIKE '%<a%';
DELETE FROM wp_comments WHERE comment_author LIKE '%<a%';
DELETE FROM wp_comments WHERE comment_author_url LIKE '%health%';

You should replace the spam comments words in SQL query. Using above sql query you can delete the all spam word comments.

For SEO purpose following options are very important.

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If we want to show the post count related to wordpress tags.

You can use following code:

<?php
//list all tags that are assigned to posts
$taxonomy = 'post_tag';
$terms = get_terms( $taxonomy, '' );
if ($terms) {
foreach($terms as $term) {
if ($term->count > 0) {
echo '<p>' . '<a href="' . esc_attr(get_term_link($term, $taxonomy)) . '" title="' . sprintf( __( "View all posts in %s" ), $term->name ) . '" ' . '>' . $term->name.'</a> has ' . $term->count . ' post(s). </p> ';
}
}
}
?>

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For post title use following code:

<?php
$page = get_page_by_title( 'About' );
wp_list_pages( 'exclude=' . $page->ID );
?>

For post slug use following code:

 $page = get_page_by_path( 'your-page-slug'
echo $page->ID;

Now List the child page by post slug

if ( $page = get_page_by_path( 'your-page-slug' ) ){
  wp_list_pages( 'orderby=name&depth=1&order=DESC&show_count=0&child_of=' .$page->ID . '&title_li=' );
}

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