apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Description

apcu_exists ( mixed $keys ) : mixed

Checks if one or more APCu entries exist.

Liste de paramètres

keys

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

Valeurs de retour

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.

Exemples

Exemple #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);

?>

L'exemple ci-dessus va afficher quelque chose de similaire à :

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

Voir aussi