wordpress Login/Logout and User Welcome

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<div id="user-details">
<?php
   if (is_user_logged_in()) {
      $user = wp_get_current_user();
      echo ‘Welcome back <strong>’.$user->display_name.‘</strong> !’;
   } else { ?>
      Please <strong><?php wp_loginout(); ?></strong>
      or <a href="<?php echo get_option(’home’); ?>/wp-login.php?action=register"> <strong>Register</strong></a>
<?php } ?>
</div>

Uses WordPress functions and queries to pull user information, and to display the login/logout/register links.

wordpress List Posts, Highlight Current

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WordPress lacks a wp_list_posts() function that might seem logical go with the robust and useful wp_list_pages() function. You can simulate it though, by using the get_posts() function and running your own loop through the results.

The parameters for get_posts() below are just examples, replace with your needs.

<ul>

    <?php
        $lastposts = get_posts('numberposts=5&orderby=rand&cat=-52');
        foreach($lastposts as $post) :
        setup_postdata($post); ?>

        <li<?php if ( $post->ID == $wp_query->post->ID ) { echo ' class="current"'; } else {} ?>>
            
            <a href="<?php the_permalink() ?>"><?php the_title(); ?></a>
            
        </li>

    <?php endforeach; ?>

</ul>

wp_list_pages() also has the feature of adding a class name of "current_page_item" to the list element when that page is the active one. Notice the opening list tag above, which replicates that functionality by seeing if the ID from the current query matches the ID from the current iteration of the loop.

wordpress Insert Images within Figure Element from Media Uploader

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For your functions.php file or a functionality plugin:

function html5_insert_image($html, $id, $caption, $title, $align, $url) {
  $html5 = "<figure id='post-$id media-$id' class='align-$align'>";
  $html5 .= "<img src='$url' alt='$title' />";
  if ($caption) {
    $html5 .= "<figcaption>$caption</figcaption>";
  }
  $html5 .= "</figure>";
  return $html5;
}
add_filter( 'image_send_to_editor', 'html5_insert_image', 10, 9 );

It also takes what you enter as a caption and inserts it within the <figure> tag as a <figcaption>. Example inserted code:

<figure id='post-18838 media-18838' class='align-none'>
  <img src='http://youresite.com/wp-content/uploads/2012/10/image.png' alt='Title of image'>
  <figcaption>Caption for image</figcaption>
</figure>

wordpress Insert Images with Figure/Figcaption

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For a simple plugin or functions.php file:

function html5_insert_image($html, $id, $caption, $title, $align, $url) {
  $html5 = "<figure id='post-$id media-$id' class='align-$align'>";
  $html5 .= "<img src='$url' alt='$title' />";
  if ($caption) {
    $html5 .= "<figcaption>$caption</figcaption>";
  }
  $html5 .= "</figure>";
  return $html5;
}
add_filter( 'image_send_to_editor', 'html5_insert_image', 10, 9 );

Reference URL

wordpress Include jQuery in WordPress Theme

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The following is the best way to go about it. Add the following to the theme's functions.php file:

if (!is_admin()) add_action("wp_enqueue_scripts", "my_jquery_enqueue", 11);
function my_jquery_enqueue() {
   wp_deregister_script('jquery');
   wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js", false, null);
   wp_enqueue_script('jquery');
}

Replace the URL with the location of what version of jQuery you want to use.

Reference URL

wordpress Include Any File From Your Theme

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<?php include (TEMPLATEPATH . '/your-file.php'); ?>

wordpress If Page Is Parent or Child

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There are built in conditional WordPress functions for testing for a page:

if ( is_page(2) ) {
  // stuff
}

Or for testing if a page is a child of a certain page:

if ( $post->post_parent == '2' ) {
  // stuff
}

But there is no built in function that combines these two things, which is a fairly common need. For example, loading a special CSS page for a whole "branch" of content. Like a "videos" page and all its children individual videos pages.

This function (add to functions.php file) creates new logical function to be used in this way:

function is_tree($pid) {      // $pid = The ID of the page we're looking for pages underneath
	global $post;         // load details about this page
	if(is_page()&&($post->post_parent==$pid||is_page($pid))) 
               return true;   // we're at the page or at a sub page
	else 
               return false;  // we're elsewhere
};

Usage

if (is_tree(2)) {
   // stuff
}