apcu_store

(PECL apcu >= 4.0.0)

apcu_store — Cache a variable in the data store

Descrizione

apcu_store(string $key, mixed $var, int $ttl = 0): bool

apcu_store(array $values, mixed $unused = NULL, int $ttl = 0): array

Cache a variable in the data store.

Nota: Unlike many other mechanisms in PHP, variables stored using apcu_store() will persist between requests (until the value is removed from the cache).

Elenco dei parametri

key: Store the variable using this name. keys are cache-unique, so storing a second value with the same key will overwrite the original value.
var: The variable to store
ttl: Time To Live; store var in the cache for ttl seconds. After the ttl has passed, the stored variable will be expunged from the cache (on the next request). If no ttl is supplied (or if the ttl is 0), the value will persist until it is removed from the cache manually, or otherwise fails to exist in the cache (clear, restart, etc.).
values: Names in key, variables in value.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento. Second syntax returns array with error keys.

Esempi

Example #1 A apcu_store() example

<?php
$bar = 'BAR';
apcu_store('foo', $bar);
var_dump(apcu_fetch('foo'));
?>

Il precedente esempio visualizzerà:

string(3) "BAR"

Vedere anche:

apcu_add() - Cache a new variable in the data store
apcu_fetch() - Fetch a stored variable from the cache
apcu_delete() - Removes a stored variable from the cache

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User Contributed Notes 1 note

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info at qmegas dot info ¶

3 years ago

Be careful when updating same key with ttl set during same request. For example:
<?php
for ($i = 0; $i < 20; $i++) {
    apcu_store('test', $i, 10);
    sleep(1);
}
?>

After 10 seconds the key will become not available and won't be updated. Tested on Windows and Linux platforms. Not sure if it's a bug or undocumented behavior.

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