apc_exists
Note that the APC cache accessible from PHP running through Apache is not accessible from CLI-PHP (the commandline PHP version). They are 2 different APC caches.
If you are trying for example to run a script from cron that needs to access the same APC cache as your scripts (executed through Apache) with PHP CLI, use file_get_contents to execute the real script or to send over the data.
Doing so executes the script on Apache.
You can also specify a return value in order to move data around.
<?PHP
file_get_contents('http://localhost/actual_processing_script.php');
?>
apc_fetch
(PECL apc >= 3.0.0)
apc_fetch — Récupère une variable stockée dans le cache
Description
Récupère une variable stockée dans le cache.
Liste de paramètres
-
key -
La clé
keyutilisée pour stocker la valeur (avec apc_store()). Si un tableau est passé, chaque élément sera récupéré et retourné. -
success -
Vaut
TRUEen cas de succès, etFALSEsi une erreur survient.
Valeurs de retour
La variable stockée ou les variables du tableau en cas de succès, FALSE
si une erreur survient.
Exemples
Exemple #1 Exemple avec apc_fetch()
<?php
$bar = 'BAR';
apc_store('foo', $bar);
var_dump(apc_fetch('foo'));
?>
L'exemple ci-dessus va afficher :
string(3) "BAR"
Historique
| Version | Description |
|---|---|
| 3.0.17 |
Le paramètre success est ajouté.
|
Voir aussi
- apc_store() - Met en cache une variable dans le magasin
- apc_delete() - Efface une variable stockée dans le cache
- APCIterator
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User Contributed Notes
apc_fetch
Anonymous
31-Oct-2011 08:15
myfirstnameattimronayne.com
18-May-2010 02:46
Another reason you might be getting null back from apc_fetch when using apc.rfc1867 is if you have only turned this option on using php_admin_value for a virtual host. It needs to be turned on globally in php.ini to work.
chris at active9 dot com
07-Jul-2009 09:00
Anyone who has enabled apc.rfc1867 for a file upload progress bar. Please note that if you are not getting any results back or a Null() data set. Then set apc.rfc1867_freq to 10k or 100k or whatever you see fit like this.
apc.rfc1867_freq = 10k
In your php.ini.
Hope this helps some of you who were getting blank data results. It seems the 0 default setting will not work on some machines. Hope this helps!
marcus at synchromedia dot co dot uk
03-May-2008 06:54
Just to clarify the multi-get capability, the result is returned as an array with cache keys as the array keys. Any missing values re not returned, for example:
<?php
apc_delete('test1');
apc_delete('test2');
apc_add('test1', 'test1');
$cached = apc_fetch(array('test1', 'test2'));
var_dump($cached);
?>
gives
array(1) {
["test1"]=>
string(5) "test1"
}
If no keys are found, you get an empty array.
nospam dot list at unclassified dot de
21-Nov-2007 12:06
This function is often cited related to file upload tracking with PHP 5.2. So I thought this is a good place to put a warning.
If you setup PHP with FastCGI, you'll probably run into trouble using this function to get any information about a running upload. At least in my case, every HTTP request is handled by a different PHP process. I could track it with the getmypid() function, which returned a different value upon every request, but only from a limited set. Also, apc_cache_info() gave me all upload_* entries that were created in that process. So when the upload was initially catched by one PHP process, all progress updates must be fetched from the same process, too, because APC cache information does not seem to be shared across multiple processes handling that domain/virtual host. But that's impossible to tell because PHP has its own load management and serves every request by an arbitrary process.
So in short: When using FastCGI and multiple PHP processes (recommended for performance reasons), you cannot use APC upload tracking. You'll only get a status update every few requests.
thijsterlouw at gmail dot com_remove_this
28-Feb-2007 10:31
As of version 3.0.13 APC (released 2007-02-24) you can perform multiple key fetches with apc_fetch. Very useful to further optimize your application!
APC changelog:
http://pecl.php.net/package-changelog.php?package=APC
example:
<?php
apc_store('key1', 'value1');
apc_store('key2', 'value2');
$keys = array('key1','key2');
$result = apc_fetch($keys); //fetch multiple keys at once!
var_dump($result);
?>