validate_current_theme()

检查当前主题文件’索引.php’和’样式表’存在。
Checks that current theme files ‘index.php’ and ‘style.css’ exists.

目录锚点：#说明#参数#源码

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说明（Description）

最初不检查默认主题，该主题是备用主题，应该始终存在。但如果它不存在，它将回到最新的核心默认主题。如果当前主题未验证，则将主题切换到回退主题。您可以使用“验证当前主题”筛选器返回false以禁用此功能。另请参阅“默认主题”

参数（Parameters）

源码（Source）

/**
 * Checks that current theme files 'index.php' and 'style.css' exists.
 *
 * Does not check the default theme, which is the fallback and should always exist.
 * Will switch theme to the fallback theme if current theme does not validate.
 * You can use the 'validate_current_theme' filter to return false to
 * disable this functionality.
 *
 * @since 1.5.0
 * @see WP_DEFAULT_THEME
 *
 * @return bool
 */
function validate_current_theme() {
	/**
	 * Filter whether to validate the current theme.
	 *
	 * @since 2.7.0
	 *
	 * @param bool true Validation flag to check the current theme.
	 */
	if ( defined('WP_INSTALLING') || ! apply_filters( 'validate_current_theme', true ) )
		return true;

	if ( get_template() != WP_DEFAULT_THEME && !file_exists(get_template_directory() . '/index.php') ) {
		switch_theme( WP_DEFAULT_THEME );
		return false;
	}

	if ( get_stylesheet() != WP_DEFAULT_THEME && !file_exists(get_template_directory() . '/style.css') ) {
		switch_theme( WP_DEFAULT_THEME );
		return false;
	}

	if ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) {
		switch_theme( WP_DEFAULT_THEME );
		return false;
	}

	return true;
}