Before you begin

The instructions below have been verified in WordPress versions 2.0 through 2.8. The only difference between these versions is the file you have to edit.

Instructions

For WordPress 2.0 or 2.1, open /wp-includes/template-functions-post.php

For WordPress 2.2 through 2.8+, open /wp-includes/post-template.php

Find the following text:

$output = get_the_password_form();
return $output;

Replace it with this:

$content = $pages[$page-1];
$content = explode('<!--more-->', $content, 2);
$output = "";
$output .= $content[0];
$output .= get_the_password_form();
return $output;

This next step is optional, but I think it makes it nicer.

In the get_the_password_form function, find the following text (may vary between versions):

This post is password protected.

And replace it with this:

The rest of this post is password protected.

Or whatever text you would like it to show.

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Instructions for:

• WordPress 2.0
• WordPress 2.1 – 2.2
• WordPress 2.3
• WordPress 2.5 and later

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WordPress 2.0

Open /wp-admin/inline-uploading.php and look for the following code:

if ( $imagedata['width'] > 128 && 
$imagedata['width'] >= $imagedata['height'] * 4 / 3 )
      $thumb = wp_create_thumbnail($file, 128);
    elseif ( $imagedata['height'] > 96 )
      $thumb = wp_create_thumbnail($file, 96);

The default max size is 128 x 96. You can change these numbers to whatever you like, although you must keep the proper aspect ratio (4 / 3).

For example, to double the size of the thumbnails, replace 128 with 256, and 96 with 192. Be sure to change both sets of numbers – they are each listed in the code twice.

WordPress 2.1 – 2.2

Open /wp-admin/admin-functions.php and look for the following code:

$max_side = apply_filters( 'wp_thumbnail_max_side_length', 
128, $attachment_id, $file );

The number specified here (128 by default) is the maximum size of either dimension. Just change this to whatever you like.

WordPress 2.3

Open /wp-admin/includes/image.php and look for the following code:

$max_side = apply_filters( 'wp_thumbnail_max_side_length', 
128, $attachment_id, $file );

The number specified here (128 by default) is the maximum size of either dimension. Just change this to whatever you like.

WordPress 2.5 and later

Version 2.5 and later have built-in support for the thumbnail size in the options.

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The code

(extra newlines have been added to the code to make it fit the page properly)

<?php $search_text = "Search"; ?> 
<form method="get" id="searchform"  
action="<?php bloginfo('home'); ?>/"> 
<input type="text" value="<?php echo $search_text; ?>"  
name="s" id="s"  
onblur="if (this.value == '')  
{this.value = '<?php echo $search_text; ?>';}"  
onfocus="if (this.value == '<?php echo $search_text; ?>')  
{this.value = '';}" /> 
<input type="hidden" id="searchsubmit" /> 
</form>

Usage

Most WordPress themes have a file called searchform.php which contains the code that generates the search form. All you generally have to do is replace the existing code with the code above.

For themes without the searchform.php file, you can place this code directly into your theme files, wherever you would like the search to go.

Changing the default text

To change the default text of the form, you just have to configure the $search_text variable in the first line of the code.

Styling the form

Using CSS, it is easy to adjust your form. For example, if you want to define the exact width of the search field, you could wrap a div around it like this:

<div class="search-form">
(form code goes here)
</div>

And then in your CSS file, add the following:

.search-form input {
  width: 150px;
}

Example

You can see an example of this method in the left sidebar of this website.

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Requirements

This code modification has been verified to work in WordPress versions 2.1 through 2.8+

Instructions

Open wp-includes/comment.php

For WordPress 2.1 through 2.7.x, Find the following code:

if ( $userdata && ( $user_id == $post_author || $user->has_cap('level_9') 
) ) {
  // The author and the admins get respect.
  $approved = 1;

For WordPress 2.8, Find the following code:

if ( isset($userdata) && ( $user_id == $post_author || $user->has_cap('moderate_comments') ) ) {
  // The author and the admins get respect.
  $approved = 1;

Then simply change level_9 to whatever user level you want. All users at or above the selected level will be able to post comments without requiring manual approval (if you have manual approval enabled).

For a complete list of the user levels, and their roles, please see this page from the WordPress codex: http://codex.wordpress.org/Roles_and_Capabilities

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Requirements

This code modification has been tested in WordPress 2.2 through 2.8+

Instructions

1) Open /wp-comments-post.php for editing (backup the file first!)

2) Find the following block of code:

Notice: In WordPress 2.8, the code has changed a bit, but should be easy to find near the top of the page.

$comment_author       = trim(strip_tags($_POST['author']));
$comment_author_email = trim($_POST['email']);
$comment_author_url   = trim($_POST['url']);
$comment_content      = trim($_POST['comment']);

3) After it, add the following:

// get list of user (display) names for blog
global $wpdb;
$valid_users = (array)$wpdb->get_results("
  SELECT display_name, user_email FROM " . $wpdb->prefix . "users");

// get ID of logged in user (if there is one)
global $userdata;
get_currentuserinfo();
$logged_in_name = $userdata->ID;
$logged_in_email = $userdata->user_email;
 
// see if the comment author matches an existing author
$found_match = FALSE;
foreach ($valid_users as $va) {
  if (trim($va->display_name) != '') {
    if (strtolower($va->display_name) == strtolower($comment_author)) {
      $found_match = TRUE;
      break;
    }
  }
  if (trim($va->user_email) != '') {
    if (strtolower($va->user_email) == strtolower($comment_author_email)) {
      $found_match = TRUE;
      break;
    }
  }  
}

// if commenter is not logged in, but match was found, block the comment
if (trim($logged_in_name) == '') {
  if ($found_match == TRUE) {
    wp_die( __('You cannot post using the name or email of a registered author.') );
  }
}

4) Save and close the file

Notes

To test this modification, simply log out and try to post a comment using the name that displays when you regularly post comments (when you are logged in).

If you would like to change the message, just modify this line:

wp_die( __('You cannot post using the name or email of a registered author.') );

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Plugin Code

function callback($buffer) {
  // modify buffer here, and then return the updated code
  return $buffer;
}
 
function buffer_start() { ob_start("callback"); }
 
function buffer_end() { ob_end_flush(); }
 
add_action('wp_head', 'buffer_start');
add_action('wp_footer', 'buffer_end');

Explanation

This plugin code registers two actions – buffer_start and buffer_end.

buffer_start is executed at the end of the header section of the html. The parameter, the callback function, is called at the end of the output buffering. This occurs at the footer of the page, when the second registered action, buffer_end, executes.

The callback function is where you add your code to change the value of the output (the $buffer variable). Then you simply return the modified code and the page will be displayed.

Notes

Be sure to use unique function names for buffer_start, buffer_end, and callback, so they do not conflict with other functions you may have in plugins.

For more information on output buffering in PHP, visit the PHP page for the ob_start() function.

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Notes

The descriptions of the table fields in the reference image below just apply to categories. The taxonomy schema is also used to handle several other objects.

When writing queries to link the tables together, be sure to use the following statement so that the results are limited to category objects:

(table_prefix)_term_taxonomy.taxnomy = 'category'

Just right-click to save the image.

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