apcu_exists

(PECL apcu >= 4.0.0)

apcu_existsChecks if entry exists

Açıklama

mixed apcu_exists ( mixed $keys )

Checks if one or more APCu entries exist.

Değiştirgeler

keys

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

Dönen Değerler

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.

Örnekler

Örnek 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);

?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

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

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