There are many wordpress plugins which using the shortcode. But you easily create custom shortcode for wordpress site. there is no need of external plugin.
custom shortcode for wordpress
Since Version 2.5 WordPress support so called Shortcodes. They have been introduced for creating macros to be use in a posts content. Many people looking for how to create the shortcode in wordpress using theme. It is very easy to build shortcode in wordpress. I given very simple code sample for creating the custom shortcode.
For more information visit following page.
For creating the custom shortcodes you need add following method in functions.php file which is located in your theme folder.
function myshortcode(){
return '<img src="http://images.purabtech.in/How-to-make-empty-the-wordpress-trash-automatically.png">';
}
add_shortcode('myshortcode', 'myshortcode');
custom shortcode for wordpress
you can change the return text or shortcode name aslo.
One of my client faced issue with Autor drop down which is in Admin section.
Display the authors in dropdown menu using hooks.
While creating the New post there was problem with the Author field. There are hundreds of irrelevant selections (users) and it’s difficult to select the right one.
WordPress is by default showing all the users in author drop down. I don’t want to show the other users in author drop down.
Hook/Filter – In wordpress Admin -Add new Post section -Display the authors in a dropdown menu using wp_dropdown_users One of my client faced issue with Autor drop down which is in Admin section. Display the authors in a dropdown menu using hooks
I searched for wp_dropdown_users hook or filter. But I did not found any proper solution.
Following articles are found helpful to me.
http://wordpress.org/support/topic/filter-for-post-quick-edit-author-drop-down
http://codex.wordpress.org/Function_Reference/wp_dropdown_users
Using that code I modified the code and I am able to fix the issue. You can put following code in to functions.php file.
/*
* Hook for showing Admin and Author in Add new Post - Admin section dropdown menu
*/
function wpapi_override_wp_dropdown_users($output) {
global $post, $user_ID;
//get the Admin-role users IDs
$admins = getUsersWithRole('admin');
//get the author-role users IDs
$authors = getUsersWithRole('author');
//merge the array
$result = array_merge($admins, $authors);
//array converted into comma seprated string
$authorsall = implode(",", $result);
// return if this isn't the theme author override dropdown
if (!preg_match('/post_author_override/', $output))
return $output;
// return if we've already replaced the list (end recursion)
if (preg_match('/post_author_override_replaced/', $output))
return $output;
// replacement call to wp_dropdown_users
$output = wp_dropdown_users(array(
'echo' => 0,
'name' => 'post_author_override_replaced',
'selected' => empty($post->ID) ? $user_ID : $post->post_author,
'include_selected' => true,
'include' => $authorsall
));
// put the original name back
$output = preg_replace('/post_author_override_replaced/', 'post_author_override', $output);
return $output;
}
add_filter('wp_dropdown_users', 'wpapi_override_wp_dropdown_users');
/*
* Find User IDs by Role
*/
function getUsersWithRole($role) {
$wp_user_search = new WP_User_Search($usersearch, $userspage, $role);
return $wp_user_search->get_results();
}
Using above code, you can load multiple role users in author drop down.
WordPress tutorial, wordpress WP_Query vs query_posts vs get_posts. There are three ways for fetching data(posts) from wordpress. query_posts more often than others. But I prefer to use WP_Query(). WP_Query is object base more secure then others.
wordpress WP_Query vs query_posts vs get_posts
wordpress WP_Query vs query_posts vs get_posts
query_posts() is overly simplistic and problematic way to to modify main query of page by replacing it with new instance of the query. It is inefficient (re-runs SQL queries) and will outright fail in some circumstances (especially often when dealing with pagination). Any modern WP code should use more reliable methods, like making use ofpre_get_posts hook, for this purpose. TL;DR don’t use query_posts() ever;
get_posts() is very similar in usage and accepts same arguments (with some nuances, like different defaults), but returns array of posts, doesn’t modify global variables and is safe to use anywhere;
WP_Query class powers both behind the scenes, but you can also create and work with own object of it. Bit more complex, less restrictions, also safe to use anywhere.
The basic difference is that query_posts() is really only for modifying the current Loop. Once you’re done it’s necessary to reset the loop and send it on its merry way. This method is also a little easier to understand, simply because your “query” is basically a URL string that you pass to the function, like so:
query_posts(‘meta_key=color&meta_value=blue’);
On the other hand, wp_query is more of a general purpose tool, and is more like directly writing MySQL queries than query_posts() is. You can also use it anywhere (not just in the Loop) and it doesn’t interfere with any currently running post queries.
