如果您可以从服务器访问文件，只需包括wp-includes/version.php 从每个安装。该文件是完全独立的，它只定义了五个变量：

/**
 * The WordPress version string
 *
 * @global string $wp_version
 */
$wp_version = \'3.5.1\';

/**
 * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
 *
 * @global int $wp_db_version
 */
$wp_db_version = 22441;

/**
 * Holds the TinyMCE version
 *
 * @global string $tinymce_version
 */
$tinymce_version = \'358-23224\';

/**
 * Holds the required PHP version
 *
 * @global string $required_php_version
 */
$required_php_version = \'5.2.4\';

/**
 * Holds the required MySQL version
 *
 * @global string $required_mysql_version
 */
$required_mysql_version = \'5.0\';

if ( \'-1\' == version_compare( $wp_version, \'3.5.1\' ) )
    return \'outdated\';