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apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Descripción

apcu_exists(mixed $keys): mixed

Checks if one or more APCu entries exist.

Parámetros

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

Valores devueltos

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.

Ejemplos

Ejemplo #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);

?>

El resultado del ejemplo sería algo similar a:

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

Ver también

apcu_cache_info() - Recupera la información almacenada en la memoria APCu
apcu_fetch() - Fetch a stored variable from the cache

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