PHP validate_file函数代码示例

 /**
  * Replaces core function to start preview theme output buffer.
  */
 static function preview_theme()
 {
     // are we previewing?
     if (!isset($_GET['template']) || !wp_verify_nonce($_GET['preview_ctc'])) {
         return;
     }
     // can user preview?
     if (!current_user_can('switch_themes')) {
         return;
     }
     // hide admin bar in preview
     if (isset($_GET['preview_iframe'])) {
         show_admin_bar(false);
     }
     // sanitize template param
     $_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);
     // check for manipulations
     if (validate_file($_GET['template'])) {
         return;
     }
     // replace future get_template calls with preview template
     add_filter('template', 'ChildThemeConfiguratorPreview::preview_theme_template_filter');
     if (isset($_GET['stylesheet'])) {
         // sanitize stylesheet param
         $_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);
         // check for manipulations
         if (validate_file($_GET['stylesheet'])) {
             return;
         }
         // replace future get_stylesheet calls with preview stylesheet
         add_filter('stylesheet', 'ChildThemeConfiguratorPreview::preview_theme_stylesheet_filter');
     }
     // swap out theme mods with preview theme mods
     add_filter('pre_option_theme_mods_' . get_option('stylesheet'), 'ChildThemeConfiguratorPreview::preview_mods');
 }

 /**
  * Get the ignored words
  *
  * @param string $lang
  *
  * @return array
  */
 private function get_ignored_words($lang)
 {
     if (null == $this->ignored_words) {
         // Require the lang file
         $relative_path = '/ignored-words/' . $lang . '.php';
         // Validate the file path to prevent traversal attacks
         if (0 !== validate_file($relative_path)) {
             return array();
         }
         $filename = dirname(__FILE__) . $relative_path;
         // Check if file exists
         if (!file_exists($filename)) {
             return array();
         }
         // Require the file
         $ignored_words = (require $filename);
         // Check if the the $ignored_words are set
         if (is_null($ignored_words) || !is_array($ignored_words)) {
             return array();
         }
         // add extra ignored words (setting)
         $ignored_words = array_merge($ignored_words, $this->get_extra_ignored_words());
         // Words to ignore
         $this->ignored_words = apply_filters('rp4wp_ignored_words', $ignored_words);
     }
     return $this->ignored_words;
 }

/**
 * Force download of certain file types via ?download=path/filename.type
 *
 * This prompts "Save As" -- handy for MP3, PDF, etc. Only works on local files.
 *
 * This information was useful: http://wordpress.stackexchange.com/questions/3480/how-can-i-force-a-file-download-in-the-wordpress-backend
 *
 * Use add_theme_support( 'ctfw_force_downloads' );
 *
 * @since 0.9
 * @global object $wp_query
 * @global object $wp_filesystem;
 */
function ctfw_force_download()
{
    global $wp_query, $wp_filesystem;
    // Theme supports this?
    if (!current_theme_supports('ctfw-force-downloads')) {
        return;
    }
    // Check if this URL is a request for file download
    if (is_front_page() && !empty($_GET['download'])) {
        // relative file path
        $relative_file_path = ltrim($_GET['download'], '/');
        // remove preceding slash, if any
        // check for directory traversal attack
        if (!validate_file($relative_file_path)) {
            // false means it passed validation
            // path to file in uploads folder (only those can be downloaded)
            $upload_dir = wp_upload_dir();
            $upload_file_path = $upload_dir['basedir'] . '/' . $relative_file_path;
            // file exists in uploads folder?
            if (file_exists($upload_file_path)) {
                // make sure file valid as upload (valid type, extension, etc.)
                $validate = wp_check_filetype_and_ext($upload_file_path, basename($upload_file_path));
                if ($validate['type'] && $validate['ext']) {
                    // empty if type not in upload_mimes, doesn't exist, etc.
                    // headers to prompt "save as"
                    $filename = basename($upload_file_path);
                    $filesize = filesize($upload_file_path);
                    header('Content-Type: application/octet-stream', true, 200);
                    // replace WordPress 404 Not Found with 200 Okay
                    header('Content-Disposition: attachment; filename=' . $filename);
                    header('Expires: 0');
                    header('Cache-Control: must-revalidate');
                    header('Pragma: public');
                    header('Content-Length: ' . $filesize);
                    // clear buffering just in case
                    @ob_end_clean();
                    flush();
                    // Prepare to use WP_Filesystem
                    /* See comments below
                    			if ( ! class_exists( 'WP_Filesystem_Base') ) {
                    				require_once ABSPATH . 'wp-admin/includes/file.php';
                    			}
                    			WP_Filesystem();
                    			*/
                    // Output file contents using Direct method
                    // readfile more efficient; WP_Filesystem security used, causes Theme Check warning
                    //echo $wp_filesystem->get_contents( $upload_file_path );
                    @readfile($upload_file_path);
                    // we're done, stop further execution
                    exit;
                }
            }
        }
        // failure of any type results in 404 file not found
        $wp_query->set_404();
        status_header(404);
    }
}

 function voce_theme_customizer_init()
 {
     if (class_exists('WP_Customize_Control')) {
         $files = glob(__DIR__ . '/controls/*.php');
         foreach ($files as $file) {
             $class = basename($file);
             if (!class_exists($class) && 0 === validate_file($file)) {
                 require_once $file;
             }
         }
         Voce_Customize_Image_Control::init();
         Voce_Customize_PSU_Control::init();
     }
 }

function amp_render()
{
    $__DIR__ = dirname(__FILE__);
    require $__DIR__ . '/includes/amp-template-actions.php';
    $post_id = get_queried_object_id();
    do_action('pre_amp_render', $post_id);
    $amp_post = new AMP_Post($post_id);
    $default_template = $__DIR__ . '/templates/amp-index.php';
    $template = apply_filters('amp_template_file', $default_template);
    if (0 !== validate_file($template)) {
        _doing_it_wrong(__FUNCTION__, __('Path validation for `amp_template_file` failed.'), '0.1');
        $template = $default_template;
    }
    include $template;
    exit;
}

function validate_file_to_edit($file, $allowed_files = '')
{
    $file = stripslashes($file);
    $code = validate_file($file, $allowed_files);
    if (!$code) {
        return $file;
    }
    switch ($code) {
        case 1:
            wp_die(__('Sorry, can’t edit files with ".." in the name. If you are trying to edit a file in your WordPress home directory, you can just type the name of the file in.'));
        case 2:
            wp_die(__('Sorry, can’t call files with their real path.'));
        case 3:
            wp_die(__('Sorry, that file cannot be edited.'));
    }
}

/**
 * Returns array of network plugin files to be included in global scope.
 *
 * The default directory is wp-content/plugins. To change the default directory
 * manually, define <code>WP_PLUGIN_DIR</code> and <code>WP_PLUGIN_URL</code>
 * in wp-config.php.
 *
 * @access private
 * @since 3.1.0
 * @return array Files to include
 */
function wp_get_active_network_plugins()
{
    $active_plugins = (array) get_site_option('active_sitewide_plugins', array());
    if (empty($active_plugins)) {
        return array();
    }
    $plugins = array();
    $active_plugins = array_keys($active_plugins);
    sort($active_plugins);
    foreach ($active_plugins as $plugin) {
        if (!validate_file($plugin) && '.php' == substr($plugin, -4) && file_exists(WP_PLUGIN_DIR . '/' . $plugin)) {
            $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
        }
    }
    return $plugins;
}

 protected function GetPostTemplate($post)
 {
     $id = $post->ID;
     $template = get_page_template_slug($id);
     $pagename = $post->post_name;
     $templates = array();
     if ($template && 0 === validate_file($template)) {
         $templates[] = $template;
     }
     if ($pagename) {
         $templates[] = "page-{$pagename}.php";
     }
     if ($id) {
         $templates[] = "page-{$id}.php";
     }
     $templates[] = 'page.php';
     return get_query_template('page', $templates);
 }

function get_file($path, $args = [])
{
    // Initial tests and path assignment; note that `validate_file()` is a core WP function
    if (empty($path) || !is_string($path) || validate_file($path) > 0 || !file_exists($path)) {
        return;
    }
    // Attempt to fetch file contents
    if (!($contents = @file_get_contents($path))) {
        return;
    }
    // Process arguments
    $args = wp_parse_args($args, ['replace' => []]);
    // Optionally strip contents of specified strings
    if (is_array($args['replace']) && !empty($args['replace'])) {
        $contents = str_replace(array_keys($args['replace']), array_values($args['replace']), $contents);
    }
    // Return whatever we have
    return $contents;
}

function wp_get_active_and_valid_plugins()
{
    $plugins = array();
    $active_plugins = (array) get_option('active_plugins', array());
    // Check for hacks file if the option is enabled
    if (get_option('hack_file') && file_exists(ABSPATH . 'my-hacks.php')) {
        _deprecated_file('my-hacks.php', '1.5');
        array_unshift($plugins, ABSPATH . 'my-hacks.php');
    }
    if (empty($active_plugins) || wp_installing()) {
        return $plugins;
    }
    $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
    foreach ($active_plugins as $plugin) {
        if (!validate_file($plugin) && '.php' == substr($plugin, -4) && file_exists(WP_PLUGIN_DIR . '/' . $plugin) && (!$network_plugins || !in_array(WP_PLUGIN_DIR . '/' . $plugin, $network_plugins))) {
            $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
        }
    }
    return $plugins;
}

 /**
  * Replaces core function to start preview theme output buffer.
  */
 static function preview_theme()
 {
     // are we previewing?
     if (!isset($_GET['template']) || !wp_verify_nonce($_GET['preview_ctc'])) {
         return;
     }
     // can user preview?
     if (!current_user_can('switch_themes')) {
         return;
     }
     // hide admin bar in preview
     if (isset($_GET['preview_iframe'])) {
         show_admin_bar(false);
     }
     // sanitize template param
     $_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);
     // check for manipulations
     if (validate_file($_GET['template'])) {
         return;
     }
     // replace future get_template calls with preview template
     add_filter('template', 'ChildThemeConfiguratorPreview::preview_theme_template_filter');
     if (isset($_GET['stylesheet'])) {
         // sanitize stylesheet param
         $_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);
         // check for manipulations
         if (validate_file($_GET['stylesheet'])) {
             return;
         }
         // replace future get_stylesheet calls with preview stylesheet
         add_filter('stylesheet', 'ChildThemeConfiguratorPreview::preview_theme_stylesheet_filter');
     }
     // swap out theme mods with preview theme mods
     add_filter('pre_option_theme_mods_' . get_option('stylesheet'), 'ChildThemeConfiguratorPreview::preview_mods');
     // impossibly high priority to test for stylesheets loaded after wp_head()
     add_action('wp_print_styles', 'ChildThemeConfiguratorPreview::test_css', 999999);
     // pass the wp_styles queue back to use for stylesheet handle verification
     add_action('wp_footer', 'ChildThemeConfiguratorPreview::parse_stylesheet');
 }

 public static function intercept_page_template_request($current)
 {
     // only perform this logic if the current requested assset is a page
     if (!is_page()) {
         return $current;
     }
     // get a list of our plugin page templates
     $intercept = apply_filters('qsot-templates-page-templates', array());
     // find the name of the template requested by this page
     $template = get_page_template_slug();
     // if the template is on the list of templates inside our plugin, then
     if (isset($intercept[$template])) {
         $templates = array();
         // add our file to a list of files to search for in the plugin template dir
         if ($template && 0 === validate_file($template)) {
             $templates[] = $template;
         }
         // find any files that match the filename in the stylesheet dir, then the theme dir, then our plugin dir. if none are found, then use whatever the $current was when the function was called
         $current = apply_filters('qsot-locate-template', $current, $templates);
     }
     return $current;
 }

/**
 * Retrieve an array of active and valid plugin files.
 *
 * While upgrading or installing WordPress, no plugins are returned.
 *
 * The default directory is wp-content/plugins. To change the default
 * directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL`
 * in wp-config.php.
 *
 * @since 3.0.0
 * @access private
 *
 * @return array Files.
 */
function wp_get_active_and_valid_plugins()
{
    $plugins = array();
    $active_plugins = (array) get_option('active_plugins', array());
    if (empty($active_plugins) || wp_installing()) {
        return $plugins;
    }
    $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
    foreach ($active_plugins as $plugin) {
        if (!validate_file($plugin) && '.php' == substr($plugin, -4) && file_exists(WP_PLUGIN_DIR . '/' . $plugin) && (!$network_plugins || !in_array(WP_PLUGIN_DIR . '/' . $plugin, $network_plugins))) {
            $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
        }
    }
    return $plugins;
}

/**
 * Validate a plugin filename
 *
 * Checks that the file exists and {@link validate_file() is valid file}. If
 * it either condition is not met, returns false and adds an error to the
 * {@see MessageHandler} stack.
 *
 * @since 1.0
 *
 * @param $filename Path to plugin
 * @return bool True if file exists and is valid, otherwise an exception will be thrown
 */
function validate_plugin($filename)
{
    switch (validate_file($filename)) {
        case 1:
        case 2:
            throw new Exception(_r('Invalid plugin path.'), Errors::get_code('admin.plugins.invalid_path'));
            break;
        default:
            if (file_exists(get_plugin_dir() . $filename)) {
                return true;
            } else {
                throw new Exception(_r('Plugin file was not found.'), Errors::get_code('admin.plugins.not_found'));
            }
    }
    return false;
}

/**
 * Start preview theme output buffer.
 *
 * Will only preform task if the user has permissions and template and preview
 * query variables exist.
 *
 * @since 2.6.0
 */
function preview_theme()
{
    if (!(isset($_GET['template']) && isset($_GET['preview']))) {
        return;
    }
    if (!current_user_can('switch_themes')) {
        return;
    }
    // Admin Thickbox requests
    if (isset($_GET['preview_iframe'])) {
        show_admin_bar(false);
    }
    $_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);
    if (validate_file($_GET['template'])) {
        return;
    }
    add_filter('template', '_preview_theme_template_filter');
    if (isset($_GET['stylesheet'])) {
        $_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);
        if (validate_file($_GET['stylesheet'])) {
            return;
        }
        add_filter('stylesheet', '_preview_theme_stylesheet_filter');
    }
    // Prevent theme mods to current theme being used on theme being previewed
    add_filter('pre_option_theme_mods_' . get_option('stylesheet'), '__return_empty_array');
    ob_start('preview_theme_ob_filter');
}