apc_delete
Is there a performance penalty to using apc_exists() and then apc_fetch() rather than just the second function? Though I would appreciate other answers I won't be using it. Seems to me that searching the cache hash twice is a bit more costly than once. On my system there are many APC calls so I suspect it would hurt performance.
apc_exists
(PECL apc >= 3.1.4)
apc_exists — Checks if APC key exists
Valor Retornado
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.
Exemplos
Exemplo #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);
?>
O exemplo acima irá imprimir algo similar a:
Foo exists: apple
Baz does not exist
array(2) {
["foo"]=>
bool(true)
["bar"]=>
bool(true)
}
Veja Também
- apc_cache_info() - Retorna informação guardada (e meta-dados) de registros do APC
- apc_fetch() - Retorna uma variável guardado do cache
User Contributed Notes
apc_exists
apc_exists
tcawe at colnect punto com
16-Oct-2010 06:50
16-Oct-2010 06:50