PHP WP_Error::cache_add方法代码示例

 /**
  * Constructor for WP_Theme.
  *
  * @global array $wp_theme_directories
  *
  * @param string $theme_dir Directory of the theme within the theme_root.
  * @param string $theme_root Theme root.
  * @param WP_Error|void $_child If this theme is a parent theme, the child may be passed for validation purposes.
  */
 public function __construct($theme_dir, $theme_root, $_child = null)
 {
     global $wp_theme_directories;
     // Initialize caching on first run.
     if (!isset(self::$persistently_cache)) {
         /** This action is documented in wp-includes/theme.php */
         self::$persistently_cache = apply_filters('wp_cache_themes_persistently', false, 'WP_Theme');
         if (self::$persistently_cache) {
             wp_cache_add_global_groups('themes');
             if (is_int(self::$persistently_cache)) {
                 self::$cache_expiration = self::$persistently_cache;
             }
         } else {
             wp_cache_add_non_persistent_groups('themes');
         }
     }
     $this->theme_root = $theme_root;
     $this->stylesheet = $theme_dir;
     // Correct a situation where the theme is 'some-directory/some-theme' but 'some-directory' was passed in as part of the theme root instead.
     if (!in_array($theme_root, (array) $wp_theme_directories) && in_array(dirname($theme_root), (array) $wp_theme_directories)) {
         $this->stylesheet = basename($this->theme_root) . '/' . $this->stylesheet;
         $this->theme_root = dirname($theme_root);
     }
     $this->cache_hash = md5($this->theme_root . '/' . $this->stylesheet);
     $theme_file = $this->stylesheet . '/style.css';
     $cache = $this->cache_get('theme');
     if (is_array($cache)) {
         foreach (array('errors', 'headers', 'template') as $key) {
             if (isset($cache[$key])) {
                 $this->{$key} = $cache[$key];
             }
         }
         if ($this->errors) {
             return;
         }
         if (isset($cache['theme_root_template'])) {
             $theme_root_template = $cache['theme_root_template'];
         }
     } elseif (!file_exists($this->theme_root . '/' . $theme_file)) {
         $this->headers['Name'] = $this->stylesheet;
         if (!file_exists($this->theme_root . '/' . $this->stylesheet)) {
             $this->errors = new WP_Error('theme_not_found', sprintf(__('The theme directory "%s" does not exist.'), esc_html($this->stylesheet)));
         } else {
             $this->errors = new WP_Error('theme_no_stylesheet', __('Stylesheet is missing.'));
         }
         $this->template = $this->stylesheet;
         $this->cache_add('theme', array('headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template));
         if (!file_exists($this->theme_root)) {
             // Don't cache this one.
             $this->errors->add('theme_root_missing', __('ERROR: The themes directory is either empty or doesn’t exist. Please check your installation.'));
         }
         return;
     } elseif (!is_readable($this->theme_root . '/' . $theme_file)) {
         $this->headers['Name'] = $this->stylesheet;
         $this->errors = new WP_Error('theme_stylesheet_not_readable', __('Stylesheet is not readable.'));
         $this->template = $this->stylesheet;
         $this->cache_add('theme', array('headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template));
         return;
     } else {
         $this->headers = get_file_data($this->theme_root . '/' . $theme_file, self::$file_headers, 'theme');
         // Default themes always trump their pretenders.
         // Properly identify default themes that are inside a directory within wp-content/themes.
         if ($default_theme_slug = array_search($this->headers['Name'], self::$default_themes)) {
             if (basename($this->stylesheet) != $default_theme_slug) {
                 $this->headers['Name'] .= '/' . $this->stylesheet;
             }
         }
     }
     // (If template is set from cache [and there are no errors], we know it's good.)
     if (!$this->template && !($this->template = $this->headers['Template'])) {
         $this->template = $this->stylesheet;
         if (!file_exists($this->theme_root . '/' . $this->stylesheet . '/index.php')) {
             $this->errors = new WP_Error('theme_no_index', __('Template is missing.'));
             $this->cache_add('theme', array('headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template));
             return;
         }
     }
     // If we got our data from cache, we can assume that 'template' is pointing to the right place.
     if (!is_array($cache) && $this->template != $this->stylesheet && !file_exists($this->theme_root . '/' . $this->template . '/index.php')) {
         // If we're in a directory of themes inside /themes, look for the parent nearby.
         // wp-content/themes/directory-of-themes/*
         $parent_dir = dirname($this->stylesheet);
         if ('.' != $parent_dir && file_exists($this->theme_root . '/' . $parent_dir . '/' . $this->template . '/index.php')) {
             $this->template = $parent_dir . '/' . $this->template;
         } elseif (($directories = search_theme_directories()) && isset($directories[$this->template])) {
             // Look for the template in the search_theme_directories() results, in case it is in another theme root.
             // We don't look into directories of themes, just the theme root.
             $theme_root_template = $directories[$this->template]['theme_root'];
         } else {
             // Parent theme is missing.
             $this->errors = new WP_Error('theme_no_parent', sprintf(__('The parent theme is missing. Please install the "%s" parent theme.'), esc_html($this->template)));
//.........这里部分代码省略.........