MCRouter::del
Delete a key
public function del(
string $key,
): Awaitable<void>;
Parameters
string $key- Key to delete
Returns
Examples
The following example uses MCRouter::del to delete a key from the memcached server. Once the key is deleted, it is no longer accessible. Nor can you delete a non-existing key.
function get_simple_mcrouter(): \MCRouter {
$servers = Vector {\getenv('HHVM_TEST_MCROUTER')};
$mc = \MCRouter::createSimple($servers);
return $mc;
}
async function set_value(
\MCRouter $mc,
string $key,
string $value,
): Awaitable<void> {
// can also pass optional int flags and int expiration time (in seconds)
await $mc->set($key, $value);
}
async function del_key(\MCRouter $mc, string $key): Awaitable<void> {
// can also pass optional int flags and int expiration time (in seconds)
await $mc->del($key);
}
<<__EntryPoint>>
async function run(): Awaitable<void> {
$mc = get_simple_mcrouter();
$unique_key = \str_shuffle('ABCDEFGHIJKLMN');
await set_value($mc, $unique_key, "Hi");
$val = await $mc->get($unique_key);
\var_dump($val);
await del_key($mc, $unique_key);
try {
// Try getting the key after it has been deleted
$val = await $mc->get($unique_key);
\var_dump($val); // Not going to get here.
} catch (\MCRouterException $ex) {
\var_dump($ex->getMessage()); // We should get here because key was deleted
}
}
```.hhvm.expectf
string(2) "Hi"
string(38) "get failed with result mc_res_notfound"
```.example.hhvm.out
string(2) "Hi"
string(38) "get failed with result mc_res_notfound"
```.skipif
\Hack\UserDocumentation\API\Examples\MCRouter\skipif();