In case you want to fetch the value of a key stored in a memcache you could connect to the memcache server via telnet and query the server for the key:
Connect to the memcache server via telnet:
:$ telnet memcache-server-host 11211
Query for stats slabs and use the slab number t query with cachedump:
stats slabs
STAT 25:chunk_size 21696
STAT 25:chunks_per_page 48
...
END
stats cachedump 25 0
ITEM GTLD_DATA [18459 b; 1520683204 s]
END
get GTLD_DATA
VALUE GTLD_DATA 1 18459
a:2:{...}
END
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