(PECL memcached >= 0.1.0)
Memcached::delete — Delete an item
   Delete the key from the server.
  
keyThe key to be deleted.
timeThe amount of time the server will wait to delete the item.
Note: As of memcached 1.3.0 (released 2009) this feature is no longer supported. Passing a non-zero
timewill cause the deletion to fail. Memcached::getResultCode() will returnMEMCACHED_INVALID_ARGUMENTS.
   Returns true on success or false on failure.
   The Memcached::getResultCode() will return
   Memcached::RES_NOTFOUND if the key does not exist.
  
Example #1 Memcached::delete() example
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->delete('key1');
?>