apcu_exists
(PECL apcu >= 4.0.0)
apcu_exists — Checks if entry exists
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)
}
See Also
- apcu_cache_info() - Retrieves cached information from APCu's data store
- apcu_fetch() - Fetch a stored variable from the cache
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