(PECL memcached >= 0.1.0)
Memcached::set — Armazena um item
Memcached::set() armazena o value
em um servidor memcache sob a key especificada. O parâmetro
expiration pode ser usado para controlar quando o valor
é considerado expirado.
O valor pode ser qualquer tipo de PHP válido, exceto recursos, porque eles
não podem ser representados de forma serializada. Se a opção
Memcached::OPT_COMPRESSION estiver ativada, o
valor serializado também será compactado antes do armazenamento.
keyA chave sob a qual armazenar o valor.
valueO valor a ser armazenado.
expirationO tempo de expiração padrão é 0. Consulte Tempos de Expiração para mais informações.
Retorna true em caso de sucesso ou false em caso de falha.
Use Memcached::getResultCode() se necessário.
Exemplo #1 Exemplo de Memcached::set()
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->set('int', 99);
$m->set('string', 'a simple string');
$m->set('array', array(11, 12));
/* expire 'object' key in 5 minutes */
$m->set('object', new stdClass, time() + 300);
var_dump($m->get('int'));
var_dump($m->get('string'));
var_dump($m->get('array'));
var_dump($m->get('object'));
?>O exemplo acima produzirá algo semelhante a:
int(99)
string(15) "a simple string"
array(2) {
[0]=>
int(11)
[1]=>
int(12)
}
object(stdClass)#1 (0) {
}
@PeterNYou said that this was wrong:$m->set('object', new stdclass, time() + 300);And instead this is the correct way:$m->set('object', new stdclass, 300);When actually, they are both correct. Expiration looks at the time given, if the number is less than or equal to 30 days(60 * 60 * 24 * 30 = 2,592,000), then it expires in that many seconds. If the number is greater than 30 days, then it expires at that UNIX time.Unlike Memcache, Memcached will not replace spaces in keys with underscores for you, and will instead send the key as provided which will cause an error that can result in keys and values being mismatched. You can avoid this problem by removing/replacing spaces before storage or setting the option Memcached::OPT_BINARY_PROTOCOL to true.In the example it shows:/* expire 'object' key in 5 minutes */$m->set('object', new stdclass, time() + 300);But this is wrong.It will not expire, at least, not for a long long time.So instead of time() + seconds, you use:$m->set('object', new stdclass, 300);And it will correctly expire after 5 minutes.Note: Using memcached 2.1.0 stable through PECL.00 = MEMCACHED_SUCCESS01 = MEMCACHED_FAILURE02 = MEMCACHED_HOST_LOOKUP_FAILURE // getaddrinfo() and getnameinfo() only03 = MEMCACHED_CONNECTION_FAILURE04 = MEMCACHED_CONNECTION_BIND_FAILURE // DEPRECATED see MEMCACHED_HOST_LOOKUP_FAILURE05 = MEMCACHED_WRITE_FAILURE06 = MEMCACHED_READ_FAILURE07 = MEMCACHED_UNKNOWN_READ_FAILURE08 = MEMCACHED_PROTOCOL_ERROR09 = MEMCACHED_CLIENT_ERROR10 = MEMCACHED_SERVER_ERROR // Server returns "SERVER_ERROR"11 = MEMCACHED_ERROR // Server returns "ERROR"12 = MEMCACHED_DATA_EXISTS13 = MEMCACHED_DATA_DOES_NOT_EXIST14 = MEMCACHED_NOTSTORED15 = MEMCACHED_STORED16 = MEMCACHED_NOTFOUND17 = MEMCACHED_MEMORY_ALLOCATION_FAILURE18 = MEMCACHED_PARTIAL_READ19 = MEMCACHED_SOME_ERRORS20 = MEMCACHED_NO_SERVERS21 = MEMCACHED_END22 = MEMCACHED_DELETED23 = MEMCACHED_VALUE24 = MEMCACHED_STAT25 = MEMCACHED_ITEM26 = MEMCACHED_ERRNO27 = MEMCACHED_FAIL_UNIX_SOCKET // DEPRECATED28 = MEMCACHED_NOT_SUPPORTED29 = MEMCACHED_NO_KEY_PROVIDED /* Deprecated. Use MEMCACHED_BAD_KEY_PROVIDED! */30 = MEMCACHED_FETCH_NOTFINISHED31 = MEMCACHED_TIMEOUT32 = MEMCACHED_BUFFERED33 = MEMCACHED_BAD_KEY_PROVIDED34 = MEMCACHED_INVALID_HOST_PROTOCOL35 = MEMCACHED_SERVER_MARKED_DEAD36 = MEMCACHED_UNKNOWN_STAT_KEY37 = MEMCACHED_E2BIG38 = MEMCACHED_INVALID_ARGUMENTS39 = MEMCACHED_KEY_TOO_BIG40 = MEMCACHED_AUTH_PROBLEM41 = MEMCACHED_AUTH_FAILURE42 = MEMCACHED_AUTH_CONTINUE43 = MEMCACHED_PARSE_ERROR44 = MEMCACHED_PARSE_USER_ERROR45 = MEMCACHED_DEPRECATED46 = MEMCACHED_IN_PROGRESS47 = MEMCACHED_SERVER_TEMPORARILY_DISABLED48 = MEMCACHED_SERVER_MEMORY_ALLOCATION_FAILURE49 = MEMCACHED_MAXIMUM_RETURN /* Always add new error code before */11 = MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE = MEMCACHED_ERRORThe method correctly returns false if you set the value to false. This means that in order to have proper fault checking mechanism in place you need to check the result code.<?php$Memcached = new Memcached();$Memcached->addServer('localhost', 11211);$Memcached->set('key', false);var_dump($Memcached->get('key')); // boolean falsevar_dump($Memcached->getResultCode()); // int 0 which is Memcached::RES_SUCCESS ?>