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apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Açıklama

apcu_exists(mixed $keys): mixed

Checks if one or more APCu entries exist.

Bağımsız Değişkenler

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

Dönen Değerler

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.

Örnekler

Örnek 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);

?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

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

Ayrıca Bakınız

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

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