wincache_ucache_info

(PECL wincache >= 1.1.0)

wincache_ucache_info — Retrieves information about data stored in the user cache

说明

array wincache_ucache_info ([ bool $summaryonly = false [, string $key = NULL ]] )

Retrieves information about data stored in the user cache.

参数

summaryonly

Controls whether the returned array will contain information about individual cache entries along with the user cache summary.

key

The key of an entry in the user cache. If specified then the returned array will contain information only about that cache entry. If not specified and summaryonly is set to FALSE then the returned array will contain information about all entries in the cache.

返回值

Array of meta data about user cache 或者在失败时返回 FALSE

The array returned by this function contains the following elements:

  • total_cache_uptime - total time in seconds that the user cache has been active
  • total_item_count - total number of elements that are currently in the user cache
  • is_local_cache - true is the cache metadata is for a local cache instance, false if the metadata is for the global cache
  • total_hit_count - number of times the data has been served from the cache
  • total_miss_count - number of times the data has not been found in the cache

  • ucache_entries - an array that contains the information about all the cached items:

    • key_name - name of the key which is used to store the data
    • value_type - type of value stored by the key
    • use_time - time in seconds since the file has been accessed in the opcode cache
    • last_check - time in seconds since the file has been checked for modifications
    • is_session - indicates if the data is a session variable
    • ttl_seconds - time remaining for the data to live in the cache, 0 meaning infinite
    • age_seconds - time elapsed from the time data has been added in the cache
    • hitcount - number of times data has been served from the cache

范例

Example #1 Using wincache_ucache_info()

<?php
wincache_ucache_get('green');
wincache_ucache_set('green', 2922);
wincache_ucache_get('green');
wincache_ucache_get('green');
wincache_ucache_get('green');
print_r(wincache_ucache_info());
?>

以上例程会输出：

Array 
( ["total_cache_uptime"] => int(0)
  ["is_local_cache"] => bool(false)
  ["total_item_count"] => int(1) 
  ["total_hit_count"] => int(3) 
  ["total_miss_count"] => int(1) 
  ["ucache_entries"] => Array(1) 
    ( [1] => Array(6)
      ( 
        ["key_name"] => string(5) "green"
        ["value_type"] => string(4) "long" 
        ["is_session"] => int(0) 
        ["ttl_seconds"] => int(0)
        ["age_seconds"] => int(0)
        ["hitcount"] => int(3) 
       ) 
    ) 
)

参见

User Contributed Notes

don dot raman at microsoft dot com 05-Mar-2010 08:53
One thing to note is that 'is_local_cache' field returned as one of the metadata in the array for User Cache will always return boolean false as User Cache is always global and never local.