オリジナルテーマ「my-theme」の作成のため、my-themeフォルダにstyle.cssとindexphpを格納した場合、style.cssの記述方法を、WP_Themeクラスをコールして確認する、

WP_Themeクラスをコールする

WP_Theme は wp-includes/class-wp-theme.php にて定義されているクラスで、開発者がテーマを扱うインターフェイスを提供します。

クラスリファレンス/WP Theme

index.phpに記述する。

$theme = new WP_THEME('my-theme', __DIR__ . '/..');
var_dump($theme);

ブラウザに表示される。

C:XXXX\public\wp-content\themes\my-theme\index.php:4:
object(WP_Theme)[4693]
  public 'update' => boolean false
  private 'theme_root' => string 'C:XXXX\public\wp-content\themes\my-theme/..' (length=69)
  private 'headers' =>
    array (size=13)
      'Name' => string '私のテーマ' (length=15)
      'ThemeURI' => string '' (length=0)
      'Description' => string '' (length=0)
      'Author' => string '' (length=0)
      'AuthorURI' => string '' (length=0)
      'Version' => string '' (length=0)
      'Template' => string '' (length=0)
      'Status' => string '' (length=0)
      'Tags' => string '' (length=0)
      'TextDomain' => string '' (length=0)
      'DomainPath' => string '' (length=0)
      'RequiresWP' => string '' (length=0)
      'RequiresPHP' => string '' (length=0)
  private 'headers_sanitized' => null
  private 'name_translated' => null
  private 'errors' => null
  private 'stylesheet' => string 'my-theme' (length=8)
  private 'template' => string 'my-theme' (length=8)
  private 'parent' => null
  private 'theme_root_uri' => null
  private 'textdomain_loaded' => null
  private 'cache_hash' => string 'XXXXX' (length=32)

wp-includes/class-wp-theme.php 引用。

final class WP_Theme implements ArrayAccess {
	private static $file_headers = array(
		'Name'        => 'Theme Name',
		'ThemeURI'    => 'Theme URI',
		'Description' => 'Description',
		'Author'      => 'Author',
		'AuthorURI'   => 'Author URI',
		'Version'     => 'Version',
		'Template'    => 'Template',
		'Status'      => 'Status',
		'Tags'        => 'Tags',
		'TextDomain'  => 'Text Domain',
		'DomainPath'  => 'Domain Path',
	);
	private static $default_themes = array(
		'classic'        => 'WordPress Classic',
		'default'        => 'WordPress Default',
		'twentyten'      => 'Twenty Ten',
		'twentyeleven'   => 'Twenty Eleven',
		'twentytwelve'   => 'Twenty Twelve',
		'twentythirteen' => 'Twenty Thirteen',
		'twentyfourteen' => 'Twenty Fourteen',
	);

	private static $tag_map = array(
		'fixed-width'    => 'fixed-layout',
		'flexible-width' => 'fluid-layout',
	);

	private $theme_root;
	private $headers = array();
	private $headers_sanitized;
	private $name_translated;
	private $errors;
	private $stylesheet;
	private $template;
	private $parent;
	private $theme_root_uri;
	private $textdomain_loaded;
	private $cache_hash;
	private static $persistently_cache;
	private static $cache_expiration = 1800;