wincache_ucache_exists

(PECL wincache >= 1.1.0)

wincache_ucache_exists — Checks if a variable exists in the user cache

bool wincache_ucache_exists ( string $key )

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

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

Returns TRUE if variable with the key exitsts, otherwise returns FALSE .

Example #1 Using wincache_ucache_exists()

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

以上例程会输出：

bool(true)

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