* This is the implementation of the method declared in the parent class.
*
* @param string the key identifying the value to be cached
* @param string the value to be cached
* @param integer the number of seconds in which the cached value will expire. 0 means never expire.
* @return boolean true if the value is successfully stored into cache, false otherwise
* Please note that as of v0.9.6, eAccelerator no longer supports data caching.
* This means if you still want to use this component, your eAccelerator should be of 0.9.5.x or lower version.
*
* Some usage examples of TEACache are as follows,
