apcu_exists
Checks if entry exists
Description
boolarray apcu_exists(stringarray $keys
)
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
- apcu_fetch