cache

Is there any danger in deleting all transients?

For development I would advise to always work with WP_DEBUG set to true and do the following: $key = ‘transient_key’; if( !WP_DEBUG && ( false !== ($transient = get_transient($key)) ){ /* Generate transient manually */ $expiration = 24*60*60;//How long to keep for set_transient($key,$transient, $expiration); } In general – it should be fine deleting transients, as … Read more

Cache remote (HTTP) request with Transients API

Catching the weather API remote data The msg, you’re showing in your question is basically the result from the weather API. And it says, that there’s no data available for your location. The first thing you want to do is some research in the Codex and the “WP HTTP API”. The right/WP way to grab … Read more

Optimize apache for WP use

Souljacker, I would first take a look at your plugins. Star Ratings for Reviews hasn’t been updated for over 3 years and looks like its real heavy on the db. I saw some raw sql with some INNER JOINS that look troublesome. On the server side you should implement some object caching. APC is the … Read more

Prevent WordPress from sending Cache-control http header

Thanks to @chrisguitarguy’s answer, you can control the http headers sent by WordPress via the “send_headers” hook. Here is the function I added to my theme’s functions.php file, and that solved the issue with the Varnish server. function varnish_safe_http_headers() { header( ‘X-UA-Compatible: IE=edge,chrome=1’ ); session_cache_limiter(”); header(“Cache-Control: public, s-maxage=120”); if( !session_id() ) { session_start(); } } … Read more

Getting failure when using filemtime() with wp_enqueue_style

It’s because you’re retrieving it via URL, but filemtime() requires a path. Use get_stylesheet_directory() instead. That returns a path: function pro_styles() { wp_enqueue_style( ‘child-style’, get_stylesheet_directory_uri() .’/child-style.css’, array(), filemtime(get_stylesheet_directory() .’/child-style.css’), ‘all’ ); } add_action( ‘wp_enqueue_scripts’, ‘pro_styles’ );

Forcing reload of editor-style.css

There is a hook for that: ‘mce_css’. It is called in _WP_Editors::editor_settings() and you get all loaded stylesheets comma separated as the first and only parameter. Now it is easy: Use the global variable $editor_styles (here are your theme’s and parent theme’s editor stylesheets stored already), add the time of the file’s last modification as … Read more

How to cache bust a child theme style.css

@dalbaeb’s comment eventually lead to insightful discussions and a feasible solution. Thanks a lot! I believe the reason my child theme CSS was loaded using ‘ver=<parent-theme-version> was because I had followed the WP Codex on child themes 1:1. My functions.php contained this: add_action(‘wp_enqueue_scripts’, ‘theme_enqueue_styles’); function theme_enqueue_styles() { wp_enqueue_style(‘parent-style’, get_template_directory_uri() . ‘/style.css’); } The code I … Read more

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