WP Trac #42573: Fix for theme template caching. https://core.trac.wordpress.org/ticket/42573

wp-42573.php

<?php
/**
 * Plugin name: WP Trac #42573: Fix for theme template file caching.
 * Description: Flush the theme file cache each time the admin screens are loaded which uses the file list.
 * Plugin URI: https://core.trac.wordpress.org/ticket/42573
 * Author: Weston Ruter, XWP.
 * Author URI: https://weston.ruter.net
 */

function wp_42573_fix_template_caching( WP_Screen $current_screen ) {

	// Only flush the file cache with each request to post list table, edit post screen, or theme editor.
	if ( ! in_array( $current_screen->base, array( 'post', 'edit', 'theme-editor' ), true ) ) {
		return;
	}

	$theme = wp_get_theme();
	if ( ! $theme ) {
		return;
	}

	$cache_hash = md5( $theme->get_theme_root() . '/' . $theme->get_stylesheet() );
	$label = sanitize_key( 'files_' . $cache_hash . '-' . $theme->get( 'Version' ) );
	$transient_key = substr( $label, 0, 29 ) . md5( $label );
	delete_transient( $transient_key );
}
add_action( 'current_screen', 'wp_42573_fix_template_caching' );

ขอบคุณครับ

thank you!

Hi, Thanks! I've also was looking for solution and that is a great one.
I've needed a flush button option because i didn't want to flush the cache every page load on the matched screens so i decided to fork it and make some additions.
I've added an option to choose between the current flush on page load or to flush with button on the admin bar, also on the button option: success notice on successful cache flush and more.
I'm new to Github so please correct me if i got it wrong but i can't create pull requests for gists, is it true? anyway, please check my fork: https://gist.github.com/Eran-E/365f10d3f967baaa29589fa1330cc129
i didn't add myself as an author.

Thanks for this buddy!

Thanks for writing this up, saved me hours!

Hi guys
Thank you for this plugin. Where do it put it? Do I add it to functions.php?
Thanks!

Thanks guys! I put it in the functions.php and it works perfectly. Grazie mille

Hi Guys, Where do it put it? Do I add it to functions.php? I found many files named functions.php in the folder Plugins; Sorry but i'm a very newbie. Thanks for your answers

@kimlinhnguyen This is now part of WordPress core and so this plugin is obsolete.

@westonruter : I still have the issue : page template is not displaying in the menu attributs of the page; Could you pls advise me a solution ? Thanks

Sorry, I can't. Please reach out to the support forums: https://wordpress.org/support/