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Memcache::set
Store data at the server
()
Memcache::set() stores an item
var with key on the
memcached server. Parameter expire is expiration
time in seconds. If it's 0, the item never expires (but memcached server
doesn't guarantee this item to be stored all the time, it could be deleted
from the cache to make place for other items).
You can use
Note:
Remember that resource variables (i.e. file and connection descriptors) cannot be stored in the cache, because they cannot be adequately represented in serialized state. Also you can use memcache_set() function. Parameters
ExamplesExample 1321. Memcache::set() example<?php Example 1322. Memcache::set() example<?php
See Also
Code Examples / Notes » memcache_setsc00bz
This is just two minor things about memcache that might not be perfectly clear, the limits on key and data sizes and what happen to flags in the memcache protocol. * There is a max key size of 250 anything bigger gets truncated. There is also a (1MB - 42 bytes) limit on the data. * In the memcache protocol there is a 16bit, 32bit in newer version, flag that you can set to whatever you want because memcache doesn't do anything with the flags. The php api doesn't let you get the flags because php uses the flags for php's own use such as "MEMCACHE_COMPRESSED" and I decided to test if it was doing something because it wasn't part of the memcache protocol. <?php $memcache = new Memcache(); $memcache->connect("127.0.0.1", 11211); // Since memcache truncates the keys at 250 bytes both the get "250 a's" and "251 a's" will find the key in the cache echo "*** Truncate key test *** "; echo "set 251: " . ($memcache->set(str_repeat("a", 251), "value", 0, 1) ? "t" : "f") . " "; echo "get 249: " . (($ret = $memcache->get(str_repeat("a", 249))) !== false ? "'$ret'" : "f") . " "; echo "get 250: " . (($ret = $memcache->get(str_repeat("a", 250))) !== false ? "'$ret'" : "f") . " "; echo "get 251: " . (($ret = $memcache->get(str_repeat("a", 251))) !== false ? "'$ret'" : "f") . " "; echo "delete: " . ($memcache->delete(str_repeat("a", 250)) ? "t" : "f") . " "; echo "*** Compress value test *** "; echo "set 1024*1024-42: " . ($memcache->set("test", str_repeat("a", 1024*1024-42), 0, 1) ? "t" : "f") . " "; echo "set 1024*1024-41: " . ($memcache->set("test", str_repeat("a", 1024*1024-41), 0, 1) ? "t" : "f") . " "; echo "set 1024*1024 compressed: " . ($memcache->set("test", str_repeat("a", 1024*1024), MEMCACHE_COMPRESSED, 1) ? "t" : "f") . " "; echo "delete: " . ($memcache->delete("test") ? "t" : "f") . " "; $memcache->close(); ?> Output: *** Truncate key test *** set 251: t get 249: f get 250: 'value' get 251: 'value' delete: t *** Compress value test *** set 1024*1024-42: t set 1024*1024-41: f set 1024*1024 compressed: t delete: t |
Change LanguageMemcache::add Memcache::addServer Memcache::close Memcache::connect memcache_debug Memcache::decrement Memcache::delete Memcache::flush Memcache::get Memcache::getExtendedStats Memcache::getServerStatus Memcache::getStats Memcache::getVersion Memcache::increment Memcache::pconnect Memcache::replace Memcache::set Memcache::setCompressThreshold Memcache::setServerParams |