We figured out that the oemebed functions aren’t cached so we wrote a simple snippet to enable transient cache for oembeds. Possibily not the best solution out there but it works on all our WordPress installations (100+):
if( !defined('PIX_OEMBED_CACHE_KEY') ) {
define('PIX_OEMBED_CACHE_KEY', 'pix_oembed_');
}
function _wp_custom_oembed_cache_key($url, $args) {
$args_serialized = serialize($args);
return PIX_OEMBED_CACHE_KEY . md5("{$url}-{$args_serialized}");
}
/**
* This function caches the result
*/
function pix_cache_wp_oembed_get_function($data, $url, $args) {
set_transient( _wp_custom_oembed_cache_key($url, $args), $data, 14*DAY_IN_SECONDS);
return $data;
}
add_filter('oembed_result', 'pix_cache_wp_oembed_get_function', 999, 3);
/**
* This function serves the cached result
*/
function pix_serve_wp_oembed_get_function($result, $url, $args) {
if(trim($url) === '') {
return '';
}
if($cached_result = get_transient(_wp_custom_oembed_cache_key($url, $args))) {
return $cached_result;
}
return $result;
}
add_filter('pre_oembed_result', 'pix_serve_wp_oembed_get_function', 2, 3);
Feel free to let me know if it works for you!
