1 ===========================
2 Determine if a keys exists.
3 ===========================
5 .. index:: object: memcached_st
12 #include <libmemcached/memcached.h>
14 .. c:function:: memcached_return_t memcached_exist(memcached_st *ptr, char *key, size_t *key_length)
16 .. c:function:: memcached_return_t memcached_exist_by_key(memcached_st *ptr, char *group_key, size_t *group_key_length, char *key, size_t *key_length)
18 .. versionadded:: 0.53
20 Compile and link with -lmemcached
27 :c:func:`memcached_exist()` can be used to check to see if a key exists. No value is returned if the key exists, or does not exist, on the server.
34 :c:func:`memcached_exist()` sets error to
35 to :c:type:`MEMCACHED_SUCCESS` upon finding that the key exists.
36 :c:type:`MEMCACHED_NOTFOUND` will be return if the key is not found.
43 To find out more information please check:
44 `http://libmemcached.org/ <http://libmemcached.org/>`_
51 :manpage:`memcached(1)` :manpage:`libmemcached(3)` :manpage:`memcached_strerror(3)`