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[edit] Last updated: Fri, 25 May 2012

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apc_exists

(PECL apc >= 3.1.4)

apc_existsChecks if APC key exists

Описание

mixed apc_exists ( mixed $keys )

Checks if one ore more APC keys exist.

Список параметров

keys

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

Возвращаемые значения

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.

Примеры

Пример #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);

?>

Результатом выполнения данного примера будет что-то подобное:

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

Смотрите также



add a note add a note User Contributed Notes apc_exists
FiFFiO 24-May-2012 08:13
apc_exists declaration if your PECL apc version is less than 3.1.4:

<?php
if(!function_exists('apc_exists'))
    {
    function
apc_exists($keys)
        {
       
$result;
       
apc_fetch($keys, $result);
        return
$result;
        }
    }
?>

 
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