_preview_theme_template_filter() │ WP 2.9.0

Deprecated since 4.3.0. It is no longer supported and may be removed in future releases. It is recommended to replace this function with the same one.

Private function to modify the current template when previewing a theme

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

String.

Usage

_preview_theme_template_filter();

Changelog

Since 2.9.0 Introduced.
Deprecated since 4.3.0

_preview_theme_template_filter() code WP 6.9

wp-includes/deprecated.php 
function _preview_theme_template_filter() {
	_deprecated_function( __FUNCTION__, '4.3.0' );
	return '';
}