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apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Descrição

apcu_exists(mixed $keys): mixed

Checks if one or more APCu entries exist.

Parâmetros

keys: A string, or an array of strings, that contain keys.

Valor Retornado

Returns true if the key exists, otherwise false Or if an array was passed to keys, then an array is returned that contains all existing keys, or an empty array if none exist.

Exemplos

Exemplo #1 apcu_exists() example

<?php
$fruit  = 'apple';
$veggie = 'carrot';

apcu_store('foo', $fruit);
apcu_store('bar', $veggie);

if (apcu_exists('foo')) {
    echo "Foo exists: ";
    echo apcu_fetch('foo');
} else {
    echo "Foo does not exist";
}

echo PHP_EOL;
if (apcu_exists('baz')) {
    echo "Baz exists.";
} else {
    echo "Baz does not exist";
}

echo PHP_EOL;

$ret = apcu_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);

?>

O exemplo acima produzirá algo semelhante a:

Foo exists: apple
Baz does not exist
array(2) {
  ["foo"]=>
  bool(true)
  ["bar"]=>
  bool(true)
}

Veja Também

apcu_cache_info() - Retrieves cached information from APCu's data store
apcu_fetch() - Fetch a stored variable from the cache

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