(PECL wincache >= 1.1.0)
wincache_ucache_set — Adds a variable in user cache and overwrites a variable if it already exists in the cache
Adds a variable in user cache. Overwrites a variable if it already exists in the cache. The added or updated variable remains in the user cache unless its time to live expires or it is deleted by using wincache_ucache_delete() or wincache_ucache_clear() functions.
key
Store the variable using this key name. If a variable with same
key is already present the function will overwrite the previous
value with the new one. key is case sensitive.
key can also take array of name => value pairs where names will be used as
keys. This can be used to add multiple values in the cache in one operation, thus avoiding
race condition.
value
Value of a variable to store. Value supports all data types except resources, such as file handles.
This paramter is ignored if first argument is an array. A general guidance is to pass NULL
as value while using array as key. If value is an
object, or an array containing objects, then the objects will be serialized. See
__sleep() for details on serializing objects.
values
Associative array of keys and values.
ttl
Time for the variable to live in the cache in seconds. After the value specified in ttl has passed
the stored variable will be deleted from the cache. This parameter takes a default value of 0 which means
the variable will stay in the cache unless explicitly deleted by using wincache_ucache_delete()
or wincache_ucache_clear() functions.
If key is string, the function returns TRUE on success and FALSE on failure.
If key is an array, the function returns:
FALSE;
Example #1 wincache_ucache_set() with key as a string
<?php
$bar = 'BAR';
var_dump(wincache_ucache_set('foo', $bar));
var_dump(wincache_ucache_get('foo'));
$bar1 = 'BAR1';
var_dump(wincache_ucache_set('foo', $bar1));
var_dump(wincache_ucache_get('foo'));
?>
以上例程会输出：
bool(true) string(3) "BAR" bool(true) string(3) "BAR1"
Example #2 wincache_ucache_set() with key as an array
<?php
$colors_array = array('green' => '5', 'Blue' => '6', 'yellow' => '7', 'cyan' => '8');
var_dump(wincache_ucache_set($colors_array));
var_dump(wincache_ucache_set($colors_array));
var_dump(wincache_ucache_get('Blue'));
?>
以上例程会输出：
array(0) {}
array(0) {}
string(1) "6"
don dot raman at microsoft dot com (2010-03-05 12:08:15)
As of writing this note (PHP 5.3.1) serialization of closure is not allowed.
This means a code like the one below:
<?php
//Closure
$bar3 = function($a) {
return $a * 2;
};
wincache_ucache_set('foo3', $bar3);
var_dump(wincache_ucache_get('foo3'));
echo "<br>";
?>
Will throw exception:
[11-Feb-2010 09:25:33] PHP Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'Closure' is not allowed' in C:\inetpub\wwwroot\phptest\tests\ucache\wincache15.php:6
Stack trace:
#0 C:\inetpub\wwwroot\phptest\tests\ucache\wincache15.php(6): wincache_ucache_set('foo3', Object(Closure))
#1 {main}
thrown in C:\inetpub\wwwroot\phptest\tests\ucache\wincache15.php on line 6
However one catch this exception like:
<?php
//Closure
$bar3 = function($a) {
return $a * 2;
};
try
{
wincache_ucache_set('foo3', $bar3);
}
catch (Exception $e)
{
var_dump($e->getMessage());
}
var_dump(wincache_ucache_get('foo3'));
echo "<br>";
?>
This will generate output as shown beloe:
string(41) "Serialization of 'Closure' is not allowed" NULL