How to Work With Cache In Wordpress

wp_cach_sample.php

<?php
function get_from_cach()
{
  $c = wp_cache_get("my_cache_whatever_name", null);
  if($c == null)
  {
     $c = $my_cache_whatever_value;
     wp_cache_set( "my_cache_whatever_name", $c, null, 1000); // Last Number is Time In Minutes
  }
  return $c;
}