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@jondcampbell
Created April 5, 2018 20:53
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Clear some WP Super Cache files when any post is saved
<?php
/**
* Functionality for managing WP Super Cache
*/
/**
* On post save
*
* @param int $post_id the post id of the post being saved.
*/
function pec_cache_post_saved( $post_id ) {
// If we aren't looking at posts skip out.
if ( get_post_type( $post_id ) != 'post' ) {
return;
}
// If the super cache function doesn't exist skip out.
if ( ! function_exists( 'wpsc_delete_files' ) ) {
return;
}
$url = get_permalink( $post_id );
// Clear the cache for the post itself.
pec_cache_clear_url( $url );
// Find the categories for this post.
$post_cats = get_the_category( $post_id );
foreach ( $post_cats as $category ) {
$category_link = get_category_link( $category->term_id );
// Clear each category cache.
pec_cache_clear_url( $category_link );
}
// Clear the homepage cache by passing in the site url WITH the trailing slash.
pec_cache_clear_url( trailingslashit( site_url() ) );
}
add_action( 'save_post', 'pec_cache_post_saved' );
/**
* Clear the cache for a path
*
* @param url $full_url the whole url we want to clear the cache of.
*
* @return bool
*/
function pec_cache_clear_url( $full_url ) {
$path = wp_parse_url( $full_url, PHP_URL_PATH );
$file_path = realpath( trailingslashit( get_supercache_dir() . str_replace( '..', '', preg_replace( '/:.*$/', '', strtolower( $path ) ) ) ) ) . '/';
if ( '/' === $file_path ) {
return false; // Directory not found. Probably not cached.
} else {
wpsc_delete_files( $file_path );
}
}
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