validate_current_theme(): bool

898function validate_current_theme() {899	/**900	 * Filters whether to validate the active theme.901	 *902	 * @since 2.7.0903	 *904	 * @param bool $validate Whether to validate the active theme. Default true.905	 */906	if ( wp_installing() || ! apply_filters( 'validate_current_theme', true ) ) {907		return true;908	}909 910	if (911		! file_exists( get_template_directory() . '/templates/index.html' )912		&& ! file_exists( get_template_directory() . '/block-templates/index.html' ) // Deprecated path support since 5.9.0.913		&& ! file_exists( get_template_directory() . '/index.php' )914	) {915		// Invalid.916	} elseif ( ! file_exists( get_template_directory() . '/style.css' ) ) {917		// Invalid.918	} elseif ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) {919		// Invalid.920	} else {921		// Valid.922		return true;923	}924 925	$default = wp_get_theme( WP_DEFAULT_THEME );926	if ( $default->exists() ) {927		switch_theme( WP_DEFAULT_THEME );928		return false;929	}930 931	/**932	 * If we're in an invalid state but WP_DEFAULT_THEME doesn't exist,933	 * switch to the latest core default theme that's installed.934	 *935	 * If it turns out that this latest core default theme is our current936	 * theme, then there's nothing we can do about that, so we have to bail,937	 * rather than going into an infinite loop. (This is why there are938	 * checks against WP_DEFAULT_THEME above, also.) We also can't do anything939	 * if it turns out there is no default theme installed. (That's `false`.)940	 */941	$default = WP_Theme::get_core_default_theme();942	if ( false === $default || get_stylesheet() === $default->get_stylesheet() ) {943		return true;944	}945 946	switch_theme( $default->get_stylesheet() );947	return false;948}