How to add administration menus in wordpress

This article explains how plugin authors can add administration menus.

Using Wrapper Functions

Since most sub-level menus belong under the Settings, Tools, or Appearance menus, WordPress supplies wrapper functions that make adding a sub-level menu items to those top-level menus easier. Note that the function names may not match the names seen in the admin UI as they have changed over time:

Dashboard
<?php add_dashboard_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Posts
<?php add_posts_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Media
<?php add_media_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Links
<?php add_links_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Pages
<?php add_pages_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Comments
<?php add_comments_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Appearance
<?php add_theme_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Plugins
<?php add_plugins_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Users
<?php add_users_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Tools
<?php add_management_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>


Settings
<?php add_options_page( $page_title, $menu_title, $capability, $menu_slug, $function); ?>

More:Here is an example of a WordPress plugin that inserts new menus into various places:
 Administration_Menus

Category Posts

<?php
/*
Template Name: Category Posts
*/
get_header();
?>

        <div id="content-container">
            <div id="content" role="main">
<?php
//get all terms (e.g. categories or post tags), then display all posts in each term
$taxonomy = 'category';//  e.g. post_tag, category
$param_type = 'category__in'; //  e.g. tag__in, category__in
$term_args=array(
 'orderby' => 'name',
 'order' => 'ASC'
);
$terms = get_terms($taxonomy,$term_args);
if ($terms) {
 foreach( $terms as $term ) {
   $args=array(
     "$param_type" => array($term->term_id),
     'post_type' => 'post',
     'post_status' => 'publish',
     'posts_per_page' => -1,
     'caller_get_posts'=> 1
     );
   $my_query = null;
   $my_query = new WP_Query($args);
   if( $my_query->have_posts() ) {
     echo '<h2>List of Posts in '.$taxonomy .' '.$term->name.'</h2>';
     while ($my_query->have_posts()) : $my_query->the_post(); ?>
     <div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
                    <?php if ( is_front_page() ) { ?>
                        <h2 class="entry-title"><?php the_title(); ?></h2>
                    <?php } else { ?>
                        <h1 class="entry-title"><?php the_title(); ?></h1>
                    <?php } ?>

                    <div class="entry-content">
                        <?php //the_content();
                        the_excerpt();
                        the_post_thumbnail(); ?>
                    </div><!-- .entry-content -->
                </div>
      
<?php

           endwhile;
   }
 }
}
wp_reset_query();  // Restore global post data stomped by the_post().
?>

            </div><!-- #content -->
        </div><!-- #content-container -->

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

Category Posts Widget

Adds a widget that shows the most recent posts in a single category.

Category Posts Widget is a light widget designed to do one thing and do it well: display the most recent posts from a certain category.

Category Posts Widget

PHP array functions

PHP array  samples
 1) Desplaing the array in order, with out using sort functions
<?php
$array=array(1,20,5,16,7,19,3);
$cnt = count($array) - 1;
$FinalTemp = array();
for ($i = 0; $i <= $cnt; $i++) {
foreach($array as $key=>$value)
{
     if($value==max($array))
 {
  $sort[] = max($array);
  unset($array[$key]);
  }
}
}
 print_r($sort);
?>

2) In the main array, First delete one array values and then add other array values to the main array.
<?php
$array=array(5,4,5,7,3,6,4,1,8,4,5,6,2,1);
$delete=array(4,5,6);
$add=array(11,12,12,18);

foreach($array as $k=>$val)
{
if(in_array($val, $delete))
{
unset($array[$k]);
}
}
$result = array_merge((array)$array, (array)$add);
arsort($result);
print_r($result);
?>


3) array_count_values — Counts all the values of an array

<?php
$arr=array(a,c,k,n,n,h,r,a,a,a,c,h,b,h,k,n);
print_r(array_count_values($arr));

?>

Back to Top Scroll Up

The following Javascript will go to top of the page, when the link is clicked.
// JavaScript Document

var up_timer

function getPosition(){
yoko = document.body.scrollLeft || document.documentElement.scrollLeft;
tate = document.body.scrollTop  || document.documentElement.scrollTop;

}

function pageup(x,y){
if(up_timer) clearTimeout(up_timer);
if(y >= 1){
getPosition();
var divisionY = (tate-(tate/5));
var Y = Math.floor(divisionY);
window.scrollTo(yoko,Y);
up_timer = setTimeout("pageup("+yoko+","+Y+")",2);
}else{
window.scrollTo(yoko,0);
clearTimeout(up_timer);
}
}

function scrollup(){
getPosition();
pageup(yoko,tate)
}

Simple rewriting using .htaccess

All requests to whatever.htm will be sent to whatever.php:

Options +FollowSymlinks
RewriteEngine on
RewriteRule ^(.*)\.htm$ $1.php [NC]

The [NC] part at the end means "No Case", or "Case-Insensitive".

Requests to the .html automatically rewrite to .php. 

Ex: If it is whatever.htm or whatever.php, but they always get whatever.php in the browser, and this works even if whatever.htm doesn't exist!

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