flush-cache.php

<?php
/**
 * Flush cache created by some popular WordPress plugins in a specific page.
 * 
 * @return void.
 */
function sa_flush_cache() {
	$post_id = get_the_ID();

	// Flush already set cache by w3total cache plugin.
	if ( function_exists( 'w3tc_pgcache_flush' ) ) {
		w3tc_pgcache_flush_post( $post_id );
	}

	// Flush already set cache by wp super cache plugin
	if ( function_exists( 'wpsc_delete_post_cache' ) ) {
		wpsc_delete_post_cache( $post_id );
	}

	// Flush already set cache by wp rocket cache plugin
	if ( function_exists( 'rocket_clean_post' ) ) {
		$post_id = get_the_ID();
		rocket_clean_post( $post_id );
	}
}

add_action( 'init', 'sa_flush_cache' );