(PECL apc >= 3.1.4)
Checks if APC key exists
mixed apc_exists ( mixed $keys )
Checks if one or more APC keys exist.
Parameters:
keys
A string, or an array of strings, that contain keys.
Returns:
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:
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); ?>
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:
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