wincache_ucache_add

(PECL wincache >= 1.1.0)

wincache_ucache_add Adds a variable in user cache only if variable does not already exist in the cache

Description

wincache_ucache_add(string $key, mixed $value, int $ttl = 0): bool
wincache_ucache_add(array $values, mixed $unused = NULL, int $ttl = 0): bool

Adds a variable in user cache, only if this variable doesn't already exist in the cache. The added 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.

Parameters

key

Store the variable using this key name. If a variable with same key is already present the function will fail and return false. key is case sensitive. To override the value even if key is present use wincache_ucache_set() function instad. 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.

Return Values

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.

Examples

Example #1 wincache_ucache_add() with key as a string

<?php
$bar 
'BAR';
var_dump(wincache_ucache_add('foo'$bar));
var_dump(wincache_ucache_add('foo'$bar));
var_dump(wincache_ucache_get('foo'));
?>

The above example will output:

bool(true)
bool(false)
string(3) "BAR" 

Example #2 wincache_ucache_add() with key as an array

<?php
$colors_array 
= array('green' => '5''Blue' => '6''yellow' => '7''cyan' => '8');
var_dump(wincache_ucache_add($colors_array));
var_dump(wincache_ucache_add($colors_array));
var_dump(wincache_ucache_get('Blue'));
?>

The above example will output:

array(0) { } 
array(4) { 
  ["green"]=> int(-1) 
  ["Blue"]=> int(-1) 
  ["yellow"]=> int(-1) 
  ["cyan"]=> int(-1) 
} 
string(1) "6"

See Also

Here you can write a comment


Please enter at least 10 characters.
Loading... Please wait.
* Pflichtangabe
There are no comments available yet.

PHP cURL Tutorial: Using cURL to Make HTTP Requests

cURL is a powerful PHP extension that allows you to communicate with different servers using various protocols, including HTTP, HTTPS, FTP, and more. ...

TheMax

Autor : TheMax
Category: PHP-Tutorials

Midjourney Tutorial - Instructions for beginners

There is an informative video about Midjourney, the tool for creating digital images using artificial intelligence, entitled "Midjourney tutorial in German - instructions for beginners" ...

Mike94

Autor : Mike94
Category: KI Tutorials

Basics of views in MySQL

Views in a MySQL database offer the option of creating a virtual table based on the result of an SQL query. This virtual table can be queried like a normal table without changing the underlying data. ...

admin

Autor : admin
Category: mySQL-Tutorials

Publish a tutorial

Share your knowledge with other developers worldwide

Share your knowledge with other developers worldwide

You are a professional in your field and want to share your knowledge, then sign up now and share it with our PHP community

learn more

Publish a tutorial