apcu_exists

(PECL apcu >= 4.0.0)

apcu_exists — Checks if entry exists

Description

apcu_exists(string|array $keys): bool|array

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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