Memcache::add Add an item to the server &reftitle.description; boolMemcache::add stringkey mixedvar intflag intexpire Memcache::add stores variable var with key only if such key doesn't exist at the server yet. Also you can use memcache_add function. &reftitle.parameters; key var flag expire &reftitle.returnvalues; &return.success; Returns &false; if such key already exist. For the rest Memcache::add behaves similarly to Memcache::set. &reftitle.examples; add('var_key', 'test variable', false, 30); ?> ]]> &reftitle.seealso; Memcache::set Memcache::replace