Last updated: Sat, 24 Mar 2007

apc_add

(No version information available, might be only in CVS)

apc_add — Cache a variable in the data store (only if it's not stored)

Popis

bool apc_add ( string $key, mixed $var [, int $ttl] )

Poznámka: Unlike many other mechanisms in PHP, variables stored using apc_add() will persist between requests (until the value is removed from the cache).

Seznam parametrů

key: Store the variable using this name. keys are cache-unique, so attempting to use apc_add() to store data with a key that already exists will not overwrite the existing data, and will instead return FALSE. (This is the only difference between apc_add() and apc_store().)
var: The variable to store
ttl: Time To Live; store var in the cache for ttl seconds. After the ttl has passed, the stored variable will be expunged from the cache (on the next request). If no ttl is supplied (or if the ttl is 0), the value will persist until it is removed from the cache manually, or otherwise fails to exist in the cache (clear, restart, etc.).

Návratové hodnoty

Vrací TRUE při úspěchu, FALSE při selhání.

Příklady

Příklad 146. A apc_add() example


<?php

$bar = 'BAR';

apc_add('foo', $bar);

var_dump(apc_fetch('foo'));

echo "\n";

$bar = 'NEVER GETS SET';

apc_add('foo', $bar);

var_dump(apc_fetch('foo'));

echo "\n";

?>

Výše uvedený příklad vypíše:


string(3) "BAR"
string(3) "BAR"

Viz také

apc_store()

apc_fetch()

apc_delete()

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apc_add

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apc_cache_info

Alternative PHP Cache

Last updated: Sat, 24 Mar 2007