apc_exists

(PECL apc >= 3.1.4)

apc_exists — Checks if APC key exists

Descrierea

apc_exists ( mixed $keys ) : mixed

Checks if one or more APC keys exist.

Parametri

keys

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

Valorile întoarse

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.

Exemple

Example #1 apc_exists() example

<?php
$fruit  = 'apple';
$veggie = 'carrot';

apc_store('foo', $fruit);
apc_store('bar', $veggie);

if (apc_exists('foo')) {
    echo "Foo exists: ";
    echo apc_fetch('foo');
} else {
    echo "Foo does not exist";
}

echo PHP_EOL;
if (apc_exists('baz')) {
    echo "Baz exists.";
} else {
    echo "Baz does not exist";
}

echo PHP_EOL;

$ret = apc_exists(array('foo', 'donotexist', 'bar'));
var_dump($ret);

?>

Exemplul de mai sus va afișa ceva similar cu:

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

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