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wincache_ucache_delete	wincache_ucache_get

WinCache Functions	Last updated: Mon, 26 Oct 2026

wincache_ucache_exists

(PECL wincache >= 1.1.0)

wincache_ucache_exists — Checks if a variable exists in the user cache

Description

function wincache_ucache_exists(string $key): bool

Checks if a variable with the key exists in the user cache or not.

Parameters

key: The key that was used to store the variable in the cache. key is case sensitive.

Return Values

Returns true if variable with the key exitsts, otherwise returns false.

Examples

Example #1 Using wincache_ucache_exists()

<?php
if (!wincache_ucache_exists('green'))
    wincache_ucache_set('green', 1);
var_dump(wincache_ucache_exists('green'));
?>

The above example will output:

bool(true)

See Also

wincache_ucache_set() - Adds a variable in user cache and overwrites a variable if it already exists in the cache
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_clear() - Deletes entire content of the user cache
wincache_ucache_delete() - Deletes variables from 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

wincache_ucache_delete	wincache_ucache_get

WinCache Functions	Last updated: Mon, 26 Oct 2026