Spammers are everywhere and in weDevs, every single day a lots of spammers are registering. Among of them “.pl” domains are mostly used. Enough is enough, so why not block them? Thats why wrote a function that will check the users email address and will find the country level domain (only the last part of the email address). If it finds in the blocked list, it will not allow the user to register in the site. Simple enough.

/**
 * Block selected top level domains from registering in your site
 *
 * @param object $errors WP_Error class
 * @return object errors
 */
function wedevs_block_user_registration_by_email( $errors ) {
    $email = $_POST['user_email'];
    $ext = substr( strrchr( $email, '.' ), 1 ); // get last part of dot in email
    $blocked_domains = array( 'pl' );

    if ( in_array( $ext, $blocked_domains ) ) {
        $errors->add( 'email_blocked', __( 'You are blocked from registration.', 'dlp' ) );
    }

    return $errors;
}

add_filter( 'registration_errors', 'wedevs_block_user_registration_by_email' );

Custom Page Template Page Based on URL Rewrite.

Originally written for my blog. But later decided to publish on wptuts+ and it’s the first one for me in envato network :)

WordPress has post sticky option only for posts post type. So if you are going to create a new custom post type, there is no native way for adding support for sticky posts. This feature was considered to bring to the core, but didn’t happen sadly.

In my case, I’m using a plugin Sticky Custom Post Types to add sticky post support for my custom post type. But the problem is, the sticky posts doesn’t stick in the post type archive. If you are registering custom post type and want to display all posts from that custom post type in a page without using any page template, custom post type archive comes handy in this case. So, if you have a post type named place, WordPress will search for a page archive-place.php to display all the posts from place post type (if it supports archive. e.g: 'has_archive' => true).

But the problem arises here, you won’t see your sticky posts at the top of the post list. Because WordPress doesn’t process sticky posts on other pages except home (e.g: is_home()). So here’s the handy hack to move all the sticky posts to the top of the archive post list.

/**
 * Put sticky posts to top at custom post archives
 * 
 * WordPress doesn't do any processing for sticky posts in custom post type archives.
 * It process sticky posts in homepage only (is_home()). This function processes
 * sticky posts at custom post archive page and puts them to the top of list.
 * 
 * @author Tareq Hasan (http://tareq.weDevs.com)
 *
 * @param array $posts array of queried posts
 * @return array
 */
function wedevs_cpt_sticky_at_top( $posts ) {

    // apply the magic on post archive only
    if ( is_main_query() && is_post_type_archive() ) {
		global $wp_query;

        $sticky_posts = get_option( 'sticky_posts' );
        $num_posts = count( $posts );
        $sticky_offset = 0;

        // loop through the post array and find the sticky post
        for ($i = 0; $i < $num_posts; $i++) {

            // Put sticky posts at the top of the posts array
            if ( in_array( $posts[$i]->ID, $sticky_posts ) ) {
                $sticky_post = $posts[$i];

                // Remove sticky from current position
                array_splice( $posts, $i, 1 );

                // Move to front, after other stickies
                array_splice( $posts, $sticky_offset, 0, array($sticky_post) );
                $sticky_offset++;

				// Remove post from sticky posts array
                $offset = array_search($sticky_post->ID, $sticky_posts);
                unset( $sticky_posts[$offset] );
            }
        }

        // Fetch sticky posts that weren't in the query results
        if ( !empty( $sticky_posts) ) {

            $stickies = get_posts( array(
                'post__in' => $sticky_posts,
                'post_type' => $wp_query->query_vars['post_type'],
                'post_status' => 'publish',
                'nopaging' => true
            ) );

            foreach ( $stickies as $sticky_post ) {
                array_splice( $posts, $sticky_offset, 0, array( $sticky_post ) );
                $sticky_offset++;
            }
        }

    }

    return $posts;
}

add_filter( 'the_posts', 'wedevs_cpt_sticky_at_top' );

So, grab the plugin mentioned earlier for adding sticky support to custom post type and use this code snippet to bring the sticky posts at the top.

If you are developing with WordPress, specially creating theme, browser needs to load your latest changes. Here is a trick to force your browser to reload the script or style:

A helper function:

/**
 * Generates dynamic JS/CSS file version number for forcefully asset loading
 * 
 * @param string $file file name relative to theme directory
 * @return bool|int last file modification time
 */
function wedevs_asset_version( $file ) {
    //file path will be relative to the current theme directory
    $file_path = is_child_theme() ? STYLESHEETPATH : TEMPLATEPATH;
    $file_path = $file_path . '/' . $file;

    if ( !is_readable( $file_path ) ) {
        return;
    }

    return filemtime( $file_path );
}

Here, we are getting the last file modification time of a file (js|css) from your current theme directory and returning the value. To use this helper function, you need to call the function with relative file path to your theme.

Usage:

wp_enqueue_script( 'theme-script', get_template_directory_uri() . '/js/scripts.js', array('jquery'), wedevs_asset_version( 'js/scripts.js' ), true );
wp_enqueue_style( 'custom-css', get_template_directory_uri() . '/css/custom.css', array('style'), wedevs_asset_version( 'css/custom.css' ) );