preview_theme

Source code

function preview_theme() {

	if ( ! (isset($_GET['template']) && isset($_GET['preview'])) )

		return;



	if ( !current_user_can( 'switch_themes' ) )

		return;



	// Admin Thickbox requests

	if ( isset( $_GET['preview_iframe'] ) )

		show_admin_bar( false );



	$_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);



	if ( validate_file($_GET['template']) )

		return;



	add_filter( 'template', '_preview_theme_template_filter' );



	if ( isset($_GET['stylesheet']) ) {

		$_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);

		if ( validate_file($_GET['stylesheet']) )

			return;

		add_filter( 'stylesheet', '_preview_theme_stylesheet_filter' );

	}



	// Prevent theme mods to current theme being used on theme being previewed

	add_filter( 'pre_option_mods_' . get_current_theme(), '__return_empty_array' );



	ob_start( 'preview_theme_ob_filter' );

}