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I'm using the Memcached::set() and Memcached::get() methods. The documentation states that if an error occurs, or, in general, to check the status of these methods, I should call Memcached::getResultCode().
Where can I find a complete list of result codes, with both what the result code represents and what its numeric values is?
The best thing I found so far is in some comments from Memcached::getResultCode(), but the list doesn't include 8 and 47. Another list is in the Memcached Predefined Constants page, but it doesn't include the numeric values.
651
A web browser requests a page, and the server runs PHP code to build it. PHP asks Memcached for the page's data via a Memcached extension. If the data is cached, it is sent back to PHP. If it isn't cached, Memcached sends the query to the database, returns the data to PHP, and stores it for the next request.
To enable the PHP Memcache extensions, you need to build PHP utilizing –enable-Memcache option when building, and configure it from the source. On Debian-based dispersions, you can use the php-Memcache package. To set global runtime configuration choices, specify the configuration option values within your php.
I found the error codes in the libmemcached source code.
0 = MEMCACHED_SUCCESS
1 = MEMCACHED_FAILURE
2 = MEMCACHED_HOST_LOOKUP_FAILURE // getaddrinfo() and getnameinfo() only
3 = MEMCACHED_CONNECTION_FAILURE
4 = MEMCACHED_CONNECTION_BIND_FAILURE // DEPRECATED see MEMCACHED_HOST_LOOKUP_FAILURE
5 = MEMCACHED_WRITE_FAILURE
6 = MEMCACHED_READ_FAILURE
7 = MEMCACHED_UNKNOWN_READ_FAILURE
8 = MEMCACHED_PROTOCOL_ERROR
9 = MEMCACHED_CLIENT_ERROR
10 = MEMCACHED_SERVER_ERROR // Server returns "SERVER_ERROR"
11 = MEMCACHED_ERROR // Server returns "ERROR"
11 = MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE = MEMCACHED_ERROR
12 = MEMCACHED_DATA_EXISTS
13 = MEMCACHED_DATA_DOES_NOT_EXIST
14 = MEMCACHED_NOTSTORED
15 = MEMCACHED_STORED
16 = MEMCACHED_NOTFOUND
17 = MEMCACHED_MEMORY_ALLOCATION_FAILURE
18 = MEMCACHED_PARTIAL_READ
19 = MEMCACHED_SOME_ERRORS
20 = MEMCACHED_NO_SERVERS
21 = MEMCACHED_END
22 = MEMCACHED_DELETED
23 = MEMCACHED_VALUE
24 = MEMCACHED_STAT
25 = MEMCACHED_ITEM
26 = MEMCACHED_ERRNO
27 = MEMCACHED_FAIL_UNIX_SOCKET // DEPRECATED
28 = MEMCACHED_NOT_SUPPORTED
29 = MEMCACHED_NO_KEY_PROVIDED /* Deprecated. Use MEMCACHED_BAD_KEY_PROVIDED! */
30 = MEMCACHED_FETCH_NOTFINISHED
31 = MEMCACHED_TIMEOUT
32 = MEMCACHED_BUFFERED
33 = MEMCACHED_BAD_KEY_PROVIDED
34 = MEMCACHED_INVALID_HOST_PROTOCOL
35 = MEMCACHED_SERVER_MARKED_DEAD
36 = MEMCACHED_UNKNOWN_STAT_KEY
37 = MEMCACHED_E2BIG
38 = MEMCACHED_INVALID_ARGUMENTS
39 = MEMCACHED_KEY_TOO_BIG
40 = MEMCACHED_AUTH_PROBLEM
41 = MEMCACHED_AUTH_FAILURE
42 = MEMCACHED_AUTH_CONTINUE
43 = MEMCACHED_PARSE_ERROR
44 = MEMCACHED_PARSE_USER_ERROR
45 = MEMCACHED_DEPRECATED
46 = MEMCACHED_IN_PROGRESS
47 = MEMCACHED_SERVER_TEMPORARILY_DISABLED
48 = MEMCACHED_SERVER_MEMORY_ALLOCATION_FAILURE
49 = MEMCACHED_MAXIMUM_RETURN /* Always add new error code before */
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