PHP 5.5.17 is available

apc_exists

(PECL apc >= 3.1.4)

apc_existsChecks if APC key exists

Beschreibung

mixed apc_exists ( mixed $keys )

Checks if one or more APC keys exist.

Parameter-Liste

keys

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

R√ľckgabewerte

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.

Beispiele

Beispiel #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);

?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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

Siehe auch

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User Contributed Notes 1 note

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0
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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