wincache_ucache_set

(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

说明

wincache_ucache_set(mixed $key, mixed $value, int $ttl = 0): bool

wincache_ucache_set(array $values, mixed $unused = NULL, int $ttl = 0): bool

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.

参数

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.

返回值

If key is string, the function returns true on success and false on failure.

If key is an array, the function returns:

If all the name => value pairs in the array can be set, function returns an empty array;
If all the name => value pairs in the array cannot be set, function returns false;
If some can be set while others cannot, function returns an array with name=>value pair for which the addition failed in the user cache.

范例

示例 #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"

示例 #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"

参见

wincache_ucache_add() - Adds a variable in user cache only if variable does not already exist in the cache
wincache_ucache_get() - Gets a variable stored in the user cache
wincache_ucache_delete() - Deletes variables from the user cache
wincache_ucache_clear() - Deletes entire content of the user cache
wincache_ucache_exists() - Checks if a variable exists in the user cache
wincache_ucache_meminfo() - Retrieves information about user cache memory usage
wincache_ucache_info() - Retrieves information about data stored in the user cache
__sleep()

add a note

User Contributed Notes 1 note

down

don dot raman at microsoft dot com ¶

12 years ago


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

add a note

官方地址：https://www.php.net/manual/en/function.wincache-ucache-set.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP获取指定函数定义在哪个文件中及行号 PHP mkdir()写出来的权限与mode值不符合 adodb连接mysql多个数据库的问题 PHP-FPM进程数的设定利用PHP SOAP实现WEB SERVICE

略微加速

PHP官方手册 - 互联网笔记

wincache_ucache_set

说明

参数

返回值

范例

参见

User Contributed Notes 1 note