    wincache_ucache_exists (PECL wincache >= 1.1.0)
wincache_ucache_exists —  Checks if a variable exists in the user cache    Description 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   


    
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