SunshinePHP Developer Conference 2015

apc_exists

(PECL apc >= 3.1.4)

apc_existsChecks if APC key exists

Descrierea

mixed apc_exists ( mixed $keys )

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)
}

Vedeți de asemenea

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User Contributed Notes 1 note

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FiFFiO
2 years ago
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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