WordPress/wp-admin/admin-functions.php

<?php

function url_shorten ($url) {
	$short_url = str_replace('http://', '', stripslashes($url));
	$short_url = str_replace('www.', '', $short_url);
	if ('/' == substr($short_url, -1))
		$short_url = substr($short_url, 0, -1);
	if (strlen($short_url) > 35)
		$short_url =  substr($short_url, 0, 32).'...';
	return $short_url;
}

function selected($selected, $current) {
	if ($selected == $current) echo ' selected="selected"';
}

function checked($checked, $current) {
	if ($checked == $current) echo ' checked="checked"';
}

function return_categories_list( $parent = 0, $sortbyname = FALSE )
{
        /*
         * This function returns an list of all categories
         * that have $parent as their parent
         * if no parent is specified we will assume top level caegories
         * are required.
         */
        global $wpdb;

        // select sort order
        $sort = "cat_id";
        if( TRUE == $sortbyname )
        {
                $sort = "cat_name";
        }

        // First query the database
        $cats_tmp = $wpdb->get_results("SELECT cat_id FROM $wpdb->categories WHERE category_parent = $parent ORDER BY $sort");

        // Now strip this down to a simple array of IDs
        $cats = array();
        if( count($cats_tmp) > 0 )
        {
                foreach( $cats_tmp as $cat )
                {
                        $cats[] = $cat->cat_id;
                }
        }

        // Return the list of categories
        return $cats;
}

function get_nested_categories($default = 0, $parent = 0) {
 global $post_ID, $mode, $wpdb;

 if ($post_ID) {
   $checked_categories = $wpdb->get_col("
     SELECT category_id
     FROM $wpdb->categories, $wpdb->post2cat
     WHERE $wpdb->post2cat.category_id = cat_ID AND $wpdb->post2cat.post_id = '$post_ID'
     ");

   if(count($checked_categories) == 0)
   {
     // No selected categories, strange
     $checked_categories[] = $default;
   }

 } else {
   $checked_categories[] = $default;
 }

 $cats = return_categories_list($parent, TRUE);
 $result = array();

 foreach($cats as $cat)
 {
   $result[$cat]['children'] = get_nested_categories($default, $cat);
   $result[$cat]['cat_ID'] = $cat;
   $result[$cat]['checked'] = in_array($cat, $checked_categories);
   $result[$cat]['cat_name'] = get_the_category_by_ID($cat);
 }

 return $result;
}

function write_nested_categories($categories) {
 foreach($categories as $category) {
   echo '<label for="category-', $category['cat_ID'], '" class="selectit"><input value="', $category['cat_ID'],
     '" type="checkbox" name="post_category[]" id="category-', $category['cat_ID'], '"',
     ($category['checked'] ? ' checked="checked"' : ""), '/> ', htmlspecialchars($category['cat_name']), "</label>\n";

   if(isset($category['children'])) {
     echo "\n<span class='cat-nest'>\n";
     write_nested_categories($category['children']);
     echo "</span>\n";
   }
 }
}

function dropdown_categories($default = 0) {
 write_nested_categories(get_nested_categories($default));
} 

// Dandy new recursive multiple category stuff.
function cat_rows($parent = 0, $level = 0, $categories = 0) {
	global $wpdb, $bgcolor;
	if (!$categories) {
		$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories ORDER BY cat_name");
	}
	if ($categories) {
		foreach ($categories as $category) {
			if ($category->category_parent == $parent) {
				$category->cat_name = htmlspecialchars($category->cat_name);
				$count = $wpdb->get_var("SELECT COUNT(post_id) FROM $wpdb->post2cat WHERE category_id = $category->cat_ID");
				$pad = str_repeat('&#8212; ', $level);

				$class = ('alternate' == $class) ? '' : 'alternate';
				echo "<tr class='$class'><th scope='row'>$category->cat_ID</th><td>$pad $category->cat_name</td>
				<td>$category->category_description</td>
				<td>$count</td>
				<td><a href='categories.php?action=edit&amp;cat_ID=$category->cat_ID' class='edit'>" . __('Edit') . "</a></td><td><a href='categories.php?action=Delete&amp;cat_ID=$category->cat_ID' onclick=\"return confirm('".  sprintf(__("You are about to delete the category \'%s\'.  All of its posts will go to the default category.\\n  \'OK\' to delete, \'Cancel\' to stop."), addslashes($category->cat_name)) . "')\" class='delete'>" .  __('Delete') . "</a></td>
				</tr>";
				cat_rows($category->cat_ID, $level + 1);
			}
		}
	} else {
		return false;
	}
}

function wp_dropdown_cats($currentcat, $currentparent = 0, $parent = 0, $level = 0, $categories = 0) {
	global $wpdb, $bgcolor;
	if (!$categories) {
		$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories ORDER BY cat_name");
	}
	if ($categories) {
		foreach ($categories as $category) { if ($currentcat != $category->cat_ID && $parent == $category->category_parent) {
			$count = $wpdb->get_var("SELECT COUNT(post_id) FROM $wpdb->post2cat WHERE category_id = $category->cat_ID");
			$pad = str_repeat('&#8211; ', $level);
			$category->cat_name = htmlspecialchars($category->cat_name);
			echo "\n\t<option value='$category->cat_ID'";
			if ($currentparent == $category->cat_ID)
				echo " selected='selected'";
			echo ">$pad$category->cat_name</option>";
			wp_dropdown_cats($currentcat, $currentparent, $category->cat_ID, $level + 1, $categories);
		} }
	} else {
		return false;
	}
}

function wp_create_thumbnail($file, $max_side, $effect = '') {

    // 1 = GIF, 2 = JPEG, 3 = PNG

    if(file_exists($file)) {
        $type = getimagesize($file);
        
        // if the associated function doesn't exist - then it's not
        // handle. duh. i hope.
        
        if(!function_exists('imagegif') && $type[2] == 1) {
            $error = __('Filetype not supported. Thumbnail not created.');
        }elseif(!function_exists('imagejpeg') && $type[2] == 2) {
            $error = __('Filetype not supported. Thumbnail not created.');
        }elseif(!function_exists('imagepng') && $type[2] == 3) {
            $error = __('Filetype not supported. Thumbnail not created.');
        } else {
        
            // create the initial copy from the original file
            if($type[2] == 1) {
                $image = imagecreatefromgif($file);
            } elseif($type[2] == 2) {
                $image = imagecreatefromjpeg($file);
            } elseif($type[2] == 3) {
                $image = imagecreatefrompng($file);
            }
            
			if (function_exists('imageantialias'))
	            imageantialias($image, TRUE);
            
            $image_attr = getimagesize($file);
            
            // figure out the longest side
            
            if($image_attr[0] > $image_attr[1]) {
                $image_width = $image_attr[0];
                $image_height = $image_attr[1];
                $image_new_width = $max_side;
                
                $image_ratio = $image_width/$image_new_width;
                $image_new_height = $image_height/$image_ratio;
                //width is > height
            } else {
                $image_width = $image_attr[0];
                $image_height = $image_attr[1];
                $image_new_height = $max_side;
                
                $image_ratio = $image_height/$image_new_height;
                $image_new_width = $image_width/$image_ratio;
                //height > width
            }
            
            $thumbnail = imagecreatetruecolor($image_new_width, $image_new_height);
            @imagecopyresized($thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $image_attr[0], $image_attr[1]);
            
            // move the thumbnail to it's final destination
            
            $path = explode('/', $file);
            $thumbpath = substr($file, 0, strrpos($file, '/')) . '/thumb-' . $path[count($path)-1];
            
            if($type[2] == 1) {
                if(!imagegif($thumbnail, $thumbpath)) {
                    $error = __("Thumbnail path invalid");
                }
            } elseif($type[2] == 2) {
                if(!imagejpeg($thumbnail, $thumbpath)) {
                    $error = __("Thumbnail path invalid");
                }
            } elseif($type[2] == 3) {
                if(!imagepng($thumbnail, $thumbpath)) {
                    $error = __("Thumbnail path invalid");
                }
            }
            
        }
    }
    
    if(!empty($error))
    {
        return $error;
    }
    else
    {
        return 1;
    }
}

// Some postmeta stuff
function has_meta($postid) {
	global $wpdb;

	return $wpdb->get_results("
		SELECT meta_key, meta_value, meta_id, post_id
		FROM $wpdb->postmeta
		WHERE post_id = '$postid'
		ORDER BY meta_key,meta_id",ARRAY_A);

}

function list_meta($meta) {
	global $post_ID;	
	// Exit if no meta
	if (!$meta) return;	
?>
<table id='meta-list' cellpadding="3">
	<tr>
		<th><?php _e('Key') ?></th>
		<th><?php _e('Value') ?></th>
		<th colspan='2'><?php _e('Action') ?></th>
	</tr>
<?php
		
	foreach ($meta as $entry) {
		$style = ('class="alternate"' == $style) ? '' : 'class="alternate"';
		echo "
	<tr $style>
		<td valign='top'><input name='meta[{$entry['meta_id']}][key]' tabindex='6' type='text' size='20' value='{$entry['meta_key']}' /></td>
		<td><textarea name='meta[{$entry['meta_id']}][value]' tabindex='6' rows='2' cols='30'>{$entry['meta_value']}</textarea></td>
		<td align='center' width='10%'><input name='updatemeta' type='submit' class='updatemeta' tabindex='6' value='" . __('Update') ."' /></td>
		<td align='center' width='10%'><input name='deletemeta[{$entry['meta_id']}]' type='submit' class='deletemeta' tabindex='6' value='" . __('Delete') ."' /></td>
	</tr>
";
	}
	echo "
	</table>
";
}

// Get a list of previously defined keys
function get_meta_keys() {
	global $wpdb;
	
	$keys = $wpdb->get_col("
		SELECT meta_key
		FROM $wpdb->postmeta
		GROUP BY meta_key
		ORDER BY meta_key");
	
	return $keys;
}

function meta_form() {
	global $wpdb;
	$keys = $wpdb->get_col("
		SELECT meta_key
		FROM $wpdb->postmeta
		GROUP BY meta_key
		ORDER BY meta_id DESC
		LIMIT 10");
?>
<h3><?php _e('Add a new custom field to this post:') ?></h3>
<table cellspacing="3" cellpadding="3">
	<tr>
<th colspan="2"><?php _e('Key') ?></th>
<th><?php _e('Value') ?></th>
</tr>
	<tr valign="top">
		<td align="right" width="18%">
<?php if ($keys) : ?>
<select id="metakeyselect" name="metakeyselect" tabindex="7">
<option value="#NONE#">- Select -</option>
<?php
	foreach($keys as $key) {
		echo "\n\t<option value='$key'>$key</option>";
	}
?>
</select> or 
<?php endif; ?>
</td>
<td><input type="text" id="metakeyinput" name="metakeyinput" tabindex="7" /></td>
		<td><textarea id="metavalue" name="metavalue" rows="3" cols="25" tabindex="7"></textarea></td>
	</tr>

</table>
<p class="submit"><input type="submit" name="updatemeta" tabindex="7" value="<?php _e('Add Custom Field &raquo;') ?>" /></p>
<?php
}

function add_meta($post_ID) {
	global $wpdb;
	
	$metakeyselect = $wpdb->escape( stripslashes( trim($_POST['metakeyselect']) ) );
	$metakeyinput  = $wpdb->escape( stripslashes( trim($_POST['metakeyinput']) ) );
	$metavalue     = $wpdb->escape( stripslashes( trim($_POST['metavalue']) ) );

	if (!empty($metavalue) && ((('#NONE#' != $metakeyselect) && !empty($metakeyselect)) || !empty($metakeyinput))) {
		// We have a key/value pair. If both the select and the 
		// input for the key have data, the input takes precedence:

		if ('#NONE#' != $metakeyselect)
			$metakey = $metakeyselect;
				
		if ($metakeyinput)
			$metakey = $metakeyinput; // default

		$result = $wpdb->query("
				INSERT INTO $wpdb->postmeta 
				(post_id,meta_key,meta_value) 
				VALUES ('$post_ID','$metakey','$metavalue')
			");
	}
} // add_meta

function delete_meta($mid) {
	global $wpdb;

	$result = $wpdb->query("DELETE FROM $wpdb->postmeta WHERE meta_id = '$mid'");
}

function update_meta($mid, $mkey, $mvalue) {
	global $wpdb;

	return $wpdb->query("UPDATE $wpdb->postmeta SET meta_key = '$mkey', meta_value = '$mvalue' WHERE meta_id = '$mid'");
}

function touch_time($edit = 1) {
	global $month, $postdata;
	// echo $postdata['Date'];
	if ('draft' == $postdata->post_status) {
		$checked = 'checked="checked" ';
		$edit = false;
	} else {
		$checked = ' ';
	}

	echo '<fieldset><legend><input type="checkbox" class="checkbox" name="edit_date" value="1" id="timestamp" '.$checked.'/> <label for="timestamp">' . __('Edit timestamp') . '</label></legend>';
	
	$time_adj = time() + (get_settings('gmt_offset') * 3600);
	$post_date = $postdata->post_date;
	$jj = ($edit) ? mysql2date('d', $post_date) : gmdate('d', $time_adj);
	$mm = ($edit) ? mysql2date('m', $post_date) : gmdate('m', $time_adj);
	$aa = ($edit) ? mysql2date('Y', $post_date) : gmdate('Y', $time_adj);
	$hh = ($edit) ? mysql2date('H', $post_date) : gmdate('H', $time_adj);
	$mn = ($edit) ? mysql2date('i', $post_date) : gmdate('i', $time_adj);
	$ss = ($edit) ? mysql2date('s', $post_date) : gmdate('s', $time_adj);

	echo "<select name=\"mm\">\n";
	for ($i=1; $i < 13; $i=$i+1) {
		echo "\t\t\t<option value=\"$i\"";
		if ($i == $mm)
		echo " selected='selected'";
		if ($i < 10) {
			$ii = "0".$i;
		} else {
			$ii = "$i";
		}
		echo ">".$month["$ii"]."</option>\n";
	} 

?>
</select>
<input type="text" name="jj" value="<?php echo $jj; ?>" size="2" maxlength="2" />
<input type="text" name="aa" value="<?php echo $aa ?>" size="4" maxlength="5" /> @ 
<input type="text" name="hh" value="<?php echo $hh ?>" size="2" maxlength="2" /> : 
<input type="text" name="mn" value="<?php echo $mn ?>" size="2" maxlength="2" /> 
<input type="hidden" name="ss" value="<?php echo $ss ?>" size="2" maxlength="2" /> <?php _e('Existing timestamp'); ?>: <?php echo "{$month[$mm]} $jj, $aa @ $hh:$mn"; ?></fieldset>
	<?php
}

function check_admin_referer() {
  $adminurl = strtolower(get_settings('siteurl')).'/wp-admin';
  $referer = strtolower($_SERVER['HTTP_REFERER']);
  if ( !strstr($referer, $adminurl) ) {
    die('Sorry, you need to enable sending referrers, for this feature to work.');
  }
}

// insert_with_markers: Owen Winkler
// Inserts an array of strings into a file (.htaccess), placing it between
// BEGIN and END markers.  Replaces existing marked info.  Retains surrounding
// data.  Creates file if none exists.
// Returns true on write success, false on failure.
function insert_with_markers($filename, $marker, $insertion) {
    if (!file_exists($filename) || is_writeable($filename)) {
        $markerdata = explode("\n", implode('', file($filename)));
        $f = fopen($filename, 'w');
        $foundit = false;
        if ($markerdata) {
            $state = true;
            $newline = '';
            foreach($markerdata as $markerline) {
                if (strstr($markerline, "# BEGIN {$marker}")) $state = false;
                if ($state) fwrite($f, "{$newline}{$markerline}");
                if (strstr($markerline, "# END {$marker}")) {
                    fwrite($f, "{$newline}# BEGIN {$marker}");
                    if(is_array($insertion)) foreach($insertion as $insertline) fwrite($f, "{$newline}{$insertline}");
                    fwrite($f, "{$newline}# END {$marker}");
                    $state = true;
                    $foundit = true;
                }
                $newline = "\n";
            }
        }
        if (!$foundit) {
            fwrite($f, "# BEGIN {$marker}\n");
            foreach($insertion as $insertline) fwrite($f, "{$insertline}\n");
            fwrite($f, "# END {$marker}");				
        }
        fclose($f);
        return true;
    } else {
        return false;
    }
}

// insert_with_markers: Owen Winkler
// Returns an array of strings from a file (.htaccess) from between BEGIN
// and END markers.
function extract_from_markers($filename, $marker) {
    $result = array();
    if($markerdata = explode("\n", implode('', file($filename))));
 {
     $state = false;
     foreach($markerdata as $markerline) {
         if(strstr($markerline, "# END {$marker}"))	$state = false;
         if($state) $result[] = $markerline;
         if(strstr($markerline, "# BEGIN {$marker}")) $state = true;
     }
 }

 return $result;
}

function the_quicktags () {
// Browser detection sucks, but until Safari supports the JS needed for this to work people just assume it's a bug in WP
if ( !strstr($_SERVER['HTTP_USER_AGENT'], 'Safari') ) :
	echo '
	<div id="quicktags">
	<a href="http://wordpress.org/docs/reference/post/#quicktags" title="' .  __('Help with quicktags') . '">' . __('Quicktags') . '</a>:
	<script src="quicktags.js" type="text/javascript"></script>
	<script type="text/javascript">edToolbar();</script>
';
	echo '</div>';
endif;
}

function get_theme_data($theme_file) {
	$theme_data = implode('', file($theme_file));
	preg_match("|Theme Name:(.*)|i", $theme_data, $theme_name);
	preg_match("|Theme URI:(.*)|i", $theme_data, $theme_uri);
	preg_match("|Description:(.*)|i", $theme_data, $description);
	preg_match("|Author:(.*)|i", $theme_data, $author_name);
	preg_match("|Author URI:(.*)|i", $theme_data, $author_uri);
	preg_match("|Template:(.*)|i", $theme_data, $template);
	if ( preg_match("|Version:(.*)|i", $theme_data, $version) )
		$version = $version[1];
	else
		$version ='';

	$description = wptexturize($description[1]);

	$name = $theme_name[1];
	$name = trim($name);
	$theme = $name;
	if ('' != $theme_uri && '' != $name) {
		$theme = __("<a href='{$theme_uri[1]}' title='Visit theme homepage'>{$theme}</a>");
	}

	if ('' == $author_uri) {
		$author = $author_name[1];
	} else {
		$author = __("<a href='{$author_uri[1]}' title='Visit author homepage'>{$author_name[1]}</a>");
	}

	return array('Name' => $name, 'Title' => $theme, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template[1]);
}

function get_themes() {
	$themes = array();
	$theme_loc = 'wp-content/themes';
	$theme_root = ABSPATH . $theme_loc;

	// Files in wp-content/themes directory
	$themes_dir = @ dir($theme_root);
	if ($themes_dir) {
		while(($theme_dir = $themes_dir->read()) !== false) {
			if (is_dir($theme_root . '/' . $theme_dir)) {
				$stylish_dir = @ dir($theme_root . '/' . $theme_dir);
				while(($theme_file = $stylish_dir->read()) !== false) {
					if ( $theme_file == 'style.css' ) {
						$theme_files[] = $theme_dir . '/' . $theme_file;
					}
				}
			}
		}
	}

	$default_files = array(get_settings('blogfilename'), 'wp-comments.php', 'wp-comments-popup.php', 'wp-comments-post.php', 'wp-footer.php', 'wp-header.php', 'wp-sidebar.php', 'footer.php', 'header.php', 'sidebar.php');

	// Get the files for the default template.
	$default_template_files = array();
	{
		$dirs = array('', 'wp-content');
		foreach ($dirs as $dir) {
			$template_dir = @ dir(ABSPATH . $dir);
			while(($file = $template_dir->read()) !== false) {
				if ( !preg_match('|^\.+$|', $file) && in_array($file, $default_files)) 
					$default_template_files[] = trim("$dir/$file", '/');
			}
		}
	}

	// Get the files for the default stylesheet.
	$default_stylesheet_files = array();
	{
		$stylesheet_dir = @ dir(ABSPATH);
		while(($file = $stylesheet_dir->read()) !== false) {
			if ( !preg_match('|^\.+$|', $file) && preg_match('|\.css$|', $file)) 
				$default_stylesheet_files[] = "$file";
		}
	}
	
	// The default theme always exists.
	$themes['Default'] = array('Name' => 'Default', 'Title' => 'WordPress Default', 'Description' => 'The default theme included with WordPress.', 'Author' => 'Dave Shea', 'Version' => '1.3', 'Template' => 'default', 'Stylesheet' => 'default', 'Template Files' => $default_template_files, 'Stylesheet Files' => $default_stylesheet_files, 'Template Dir' => '/', 'Stylesheet Dir' => '/', 'Parent Theme' => '');

	if (!$themes_dir || !$theme_files) {
		return $themes;
	}

	sort($theme_files);

	foreach($theme_files as $theme_file) {
		$theme_data = get_theme_data("$theme_root/$theme_file");
	  
		$name = $theme_data['Name']; 
		$title = $theme_data['Title'];
		$description = wptexturize($theme_data['Description']);
		$version = $theme_data['Version'];
		$author = $theme_data['Author'];
		$template = $theme_data['Template'];
		$stylesheet = dirname($theme_file);

		if (empty($template)) {
			if (file_exists(dirname("$theme_root/$theme_file/index.php"))) {
				$template = dirname($theme_file);
			} else {
				continue;
			}
		}

		$template = trim($template);

		if (($template != 'default') && (! file_exists("$theme_root/$template/index.php"))) {
			continue;
		}

		if (empty($name)) {
			$name = dirname($theme_file);
			$title = $name;
		}
		
		$stylesheet_files = array();
		if ($stylesheet != 'default') {
			$stylesheet_dir = @ dir("$theme_root/$stylesheet");
			if ($stylesheet_dir) {
				while(($file = $stylesheet_dir->read()) !== false) {
					if ( !preg_match('|^\.+$|', $file) && preg_match('|\.css$|', $file) ) 
						$stylesheet_files[] = "$theme_loc/$stylesheet/$file";
				}
			}
		} else {
			$stylesheet_files = $default_stylesheet_files;
		}

		$template_files = array();		
		if ($template != 'default') {
			$template_dir = @ dir("$theme_root/$template");
			if ($template_dir) {
				while(($file = $template_dir->read()) !== false) {
					if ( !preg_match('|^\.+$|', $file) && preg_match('|\.php$|', $file) ) 
						$template_files[] = "$theme_loc/$template/$file";
				}
			}
		} else {
			$template_files = $default_template_files;
		}

		$template_dir = dirname($template_files[0]);
		$stylesheet_dir = dirname($stylesheet_files[0]);

		if (empty($template_dir)) $template_dir = '/';
		if (empty($stylesheet_dir)) $stylesheet_dir = '/';
		
		$themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Stylesheet' => $stylesheet, 'Template Files' => $template_files, 'Stylesheet Files' => $stylesheet_files, 'Template Dir' => $template_dir, 'Stylesheet Dir' => $stylesheet_dir);
	}

	// Resolve theme dependencies.
	$theme_names = array_keys($themes);

	foreach ($theme_names as $theme_name) {
		$themes[$theme_name]['Parent Theme'] = '';
		if ($themes[$theme_name]['Stylesheet'] != $themes[$theme_name]['Template']) {
			foreach ($theme_names as $parent_theme_name) {
				if (($themes[$parent_theme_name]['Stylesheet'] == $themes[$parent_theme_name]['Template']) && ($themes[$parent_theme_name]['Template'] == $themes[$theme_name]['Template'])) {
					$themes[$theme_name]['Parent Theme'] = $themes[$parent_theme_name]['Name'];
					break;
				}
			}
		}
	}

	return $themes;
}

function get_current_theme() {
	$themes = get_themes();
	$theme_names = array_keys($themes);
	$current_template = get_settings('template');
	$current_stylesheet = get_settings('stylesheet');
	$current_theme = 'Default';

	if ($themes) {
		foreach ($theme_names as $theme_name) {
			if ($themes[$theme_name]['Stylesheet'] == $current_stylesheet &&
					$themes[$theme_name]['Template'] == $current_template) {
				$current_theme = $themes[$theme_name]['Name'];
			}
		}
	}

	return $current_theme;
}

function validate_current_theme() {
	$theme_loc = 'wp-content/themes';
	$theme_root = ABSPATH . $theme_loc;

	$template = get_settings('template');
	$stylesheet = get_settings('stylesheet');

	if (($template != 'default') && (! file_exists("$theme_root/$template/index.php"))) {
		update_option('template', 'default');
		update_option('stylesheet', 'default');
		return false;
	}

	if (($stylesheet != 'default') && (! file_exists("$theme_root/$stylesheet/style.css"))) {
		update_option('template', 'default');
		update_option('stylesheet', 'default');
		return false;
	}

	return true;
}

?>