Remove phastpress cache when purging cache on Powered Cache

phast-purge-with-powered-cache.php

<?php

add_action( 'plugins_loaded', function () {
	add_action( 'powered_cache_flushed', 'flush_phast_cache' );
	add_action( 'powered_cache_purge_all_cache', 'flush_phast_cache' );
	add_action( 'powered_cache_clean_site_cache_dir', 'flush_phast_cache' );
} );

function flush_phast_cache() {
	$cache_dir = WP_CONTENT_DIR . '/cache/';

	$db_files = glob( $cache_dir . 'phast.*/*sqlite3*' );
	foreach ( $db_files as $file ) {
		@unlink( $file );
	}
}