# wincache_ucache_delete

(PECL wincache >= 1.1.0)

wincache_ucache_delete — Deletes variables from the user cache

### 说明

wincache_ucache_delete ( mixed `$key` ) : bool

Deletes the elements in the user cache pointed by `key`.

### 参数

`key`

  The `key` that was used to store the variable in the cache. `key` is case sensitive. `key` can be an array of keys.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

If `key` is an array then the function returns `FALSE` if every element of the array fails to get deleted from the user cache, otherwise returns an array which consists of all the keys that are deleted.

### 范例

Example #1 Using wincache_ucache_delete() with `key` as a string

    <?php
    wincache_ucache_set('foo', 'bar');
    var_dump(wincache_ucache_delete('foo'));
    var_dump(wincache_ucache_exists('foo'));
    ?>

以上例程会输出：

    bool(true)
    bool(false)

Example #2 Usingwincache_ucache_delete() with `key` as an array

    <?php
    $array1 = array('green' => '5', 'blue' => '6', 'yellow' => '7', 'cyan' => '8');
    wincache_ucache_set($array1);
    $array2 = array('green', 'blue', 'yellow', 'cyan');
    var_dump(wincache_ucache_delete($array2));
    ?>

以上例程会输出：

    array(4) { [0]=> string(5) "green"
               [1]=> string(4) "Blue"
               [2]=> string(6) "yellow"
               [3]=> string(4) "cyan" }

Example #3 Using wincache_ucache_delete() with `key` as an array where some elements cannot be deleted

    <?php
    $array1 = array('green' => '5', 'blue' => '6', 'yellow' => '7', 'cyan' => '8');
    wincache_ucache_set($array1);
    $array2 = array('orange', 'red', 'yellow', 'cyan');
    var_dump(wincache_ucache_delete($array2));
    ?>

以上例程会输出：

    array(2) { [0]=> string(6) "yellow"
               [1]=> string(4) "cyan" }

### 参见

- 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_exists() - Checks if a variable exists in 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