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    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.

    Parameters

    keys

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

    Return Values

    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.

    Examples

    Example #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);

    ?>

    The above example will output something similar to:

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

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