Retrieve list of themes with theme data in theme directory.
The theme is broken, if it doesn’t have a parent theme and is missing either style.css and, or index.php. If the theme has a parent theme then it is broken, if it is missing style.css; index.php is optional. The broken theme list is saved in the $wp_broken_themes global, which is displayed on the theme list in the administration panels.
Return values
returns:Theme list with theme data.
Source code
function get_themes() {
global $wp_themes, $wp_broken_themes;
if ( isset($wp_themes) )
return $wp_themes;
if ( !$theme_files = search_theme_directories() )
return false;
asort( $theme_files );
$wp_themes = array();
foreach ( (array) $theme_files as $theme_file ) {
$theme_root = $theme_file['theme_root'];
$theme_file = $theme_file['theme_file'];
if ( !is_readable("$theme_root/$theme_file") ) {
$wp_broken_themes[$theme_file] = array('Name' => $theme_file, 'Title' => $theme_file, 'Description' => __('File not readable.'));
continue;
}
$theme_data = get_theme_data("$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);
$screenshot = false;
foreach ( array('png', 'gif', 'jpg', 'jpeg') as $ext ) {
if (file_exists("$theme_root/$stylesheet/screenshot.$ext")) {
$screenshot = "screenshot.$ext";
break;
}
}
if ( empty($name) ) {
$name = dirname($theme_file);
$title = $name;
}
$parent_template = $template;
if ( empty($template) ) {
if ( file_exists("$theme_root/$stylesheet/index.php") )
$template = $stylesheet;
else
continue;
}
$template = trim( $template );
if ( !file_exists("$theme_root/$template/index.php") ) {
$parent_dir = dirname(dirname($theme_file));
if ( file_exists("$theme_root/$parent_dir/$template/index.php") ) {
$template = "$parent_dir/$template";
$template_directory = "$theme_root/$template";
} else {
/**
* The parent theme doesn't exist in the current theme's folder or sub folder
* so lets use the theme root for the parent template.
*/
if ( isset($theme_files[$template]) && file_exists( $theme_files[$template]['theme_root'] . "/$template/index.php" ) ) {
$template_directory = $theme_files[$template]['theme_root'] . "/$template";
} else {
if ( empty( $parent_template) )
$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'), 'error' => 'no_template');
else
$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => sprintf( __('The parent theme is missing. Please install the "%s" parent theme.'), $parent_template ), 'error' => 'no_parent', 'parent' => $parent_template );
continue;
}
}
} else {
$template_directory = trim( $theme_root . '/' . $template );
}
$stylesheet_files = array();
$template_files = array();
$stylesheet_dir = @ dir("$theme_root/$stylesheet");
if ( $stylesheet_dir ) {
while ( ($file = $stylesheet_dir->read()) !== false ) {
if ( !preg_match('|^\.+$|', $file) ) {
if ( preg_match('|\.css$|', $file) )
$stylesheet_files[] = "$theme_root/$stylesheet/$file";
elseif ( preg_match('|\.php$|', $file) )
$template_files[] = "$theme_root/$stylesheet/$file";
}
}
@ $stylesheet_dir->close();
}
$template_dir = @ dir("$template_directory");
if ( $template_dir ) {
while ( ($file = $template_dir->read()) !== false ) {
if ( preg_match('|^\.+$|', $file) )
continue;
if ( preg_match('|\.php$|', $file) ) {
$template_files[] = "$template_directory/$file";
} elseif ( is_dir("$template_directory/$file") ) {
$template_subdir = @ dir("$template_directory/$file");
if ( !$template_subdir )
continue;
while ( ($subfile = $template_subdir->read()) !== false ) {
if ( preg_match('|^\.+$|', $subfile) )
continue;
if ( preg_match('|\.php$|', $subfile) )
$template_files[] = "$template_directory/$file/$subfile";
}
@ $template_subdir->close();
}
}
@ $template_dir->close();
}
//Make unique and remove duplicates when stylesheet and template are the same i.e. most themes
$template_files = array_unique($template_files);
$stylesheet_files = array_unique($stylesheet_files);
$template_dir = $template_directory;
$stylesheet_dir = $theme_root . '/' . $stylesheet;
if ( empty($template_dir) )
$template_dir = '/';
if ( empty($stylesheet_dir) )
$stylesheet_dir = '/';
// Check for theme name collision. This occurs if a theme is copied to
// a new theme directory and the theme header is not updated. Whichever
// theme is first keeps the name. Subsequent themes get a suffix applied.
// The Twenty Eleven, Twenty Ten, Default and Classic themes always trump
// their pretenders.
if ( isset($wp_themes[$name]) ) {
$trump_cards = array(
'classic' => 'WordPress Classic',
'default' => 'WordPress Default',
'twentyten' => 'Twenty Ten',
'twentyeleven' => 'Twenty Eleven',
);
if ( isset( $trump_cards[ $stylesheet ] ) && $name == $trump_cards[ $stylesheet ] ) {
// If another theme has claimed to be one of our default themes, move
// them aside.
$suffix = $wp_themes[$name]['Stylesheet'];
$new_name = "$name/$suffix";
$wp_themes[$new_name] = $wp_themes[$name];
$wp_themes[$new_name]['Name'] = $new_name;
} else {
$name = "$name/$stylesheet";
}
}
$theme_roots[$stylesheet] = str_replace( WP_CONTENT_DIR, '', $theme_root );
$wp_themes[$name] = array(
'Name' => $name,
'Title' => $title,
'Description' => $description,
'Author' => $author,
'Author Name' => $theme_data['AuthorName'],
'Author URI' => $theme_data['AuthorURI'],
'Version' => $version,
'Template' => $template,
'Stylesheet' => $stylesheet,
'Template Files' => $template_files,
'Stylesheet Files' => $stylesheet_files,
'Template Dir' => $template_dir,
'Stylesheet Dir' => $stylesheet_dir,
'Status' => $theme_data['Status'],
'Screenshot' => $screenshot,
'Tags' => $theme_data['Tags'],
'Theme Root' => $theme_root,
'Theme Root URI' => str_replace( WP_CONTENT_DIR, content_url(), $theme_root ),
);
}
unset($theme_files);
/* Store theme roots in the DB */
if ( get_site_transient( 'theme_roots' ) != $theme_roots )
set_site_transient( 'theme_roots', $theme_roots, 7200 ); // cache for two hours
unset($theme_roots);
/* Resolve theme dependencies. */
$theme_names = array_keys( $wp_themes );
foreach ( (array) $theme_names as $theme_name ) {
$wp_themes[$theme_name]['Parent Theme'] = '';
if ( $wp_themes[$theme_name]['Stylesheet'] != $wp_themes[$theme_name]['Template'] ) {
foreach ( (array) $theme_names as $parent_theme_name ) {
if ( ($wp_themes[$parent_theme_name]['Stylesheet'] == $wp_themes[$parent_theme_name]['Template']) && ($wp_themes[$parent_theme_name]['Template'] == $wp_themes[$theme_name]['Template']) ) {
$wp_themes[$theme_name]['Parent Theme'] = $wp_themes[$parent_theme_name]['Name'];
break;
}
}
}
}
return $wp_themes;
}
1767
February 12, 2011 
A HitchHackers guide through WordPress 