apcu_exists

apcu_exists

Checks if entry exists

 **apcu_exists**  $keys

Checks if one or more APCu entries exist.

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

Returns true if the key exists, otherwise false Or if an was passed to , then an array is returned that contains all existing keys, or an empty array if none exist. array``keys

Voorbeeld: 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);

?>

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

apcu_cache_info``apcu_fetch