wincache_ucache_set

Adds a variable in user cache and overwrites a variable if it already exists in the cache

&reftitle.description; `bool` `wincache_ucache_set` `mixed` `key` `mixed` `value` `int` `ttl` 0 `bool` `wincache_ucache_set` `array` `values` `mixed` `unused` `int` `ttl` 0

Adds a variable in user cache. Overwrites a variable if it already exists in the cache. The added or updated variable remains in the user cache unless its time to live expires or it is deleted by using `wincache_ucache_delete` or `wincache_ucache_clear` functions.

&reftitle.parameters;

`key`

- Store the variable using this `key` name. If a variable with same `key` is already present the function will overwrite the previous value with the new one. `key` is case sensitive. `key` can also take array of name => value pairs where names will be used as keys. This can be used to add multiple values in the cache in one operation, thus avoiding race condition.

`value`

- Value of a variable to store. `Value` supports all data types except resources, such as file handles. This paramter is ignored if first argument is an array. A general guidance is to pass &null; as `value` while using array as `key`. If `value` is an object, or an array containing objects, then the objects will be serialized. See __sleep() for details on serializing objects.

`values`

- Associative array of keys and values.

`ttl`

- Time for the variable to live in the cache in seconds. After the value specified in `ttl` has passed the stored variable will be deleted from the cache. This parameter takes a default value of `0` which means the variable will stay in the cache unless explicitly deleted by using `wincache_ucache_delete` or `wincache_ucache_clear` functions.

&reftitle.returnvalues;

If `key` is string, the function returns &true; on success and &false; on failure.

If `key` is an array, the function returns:

- If all the name => value pairs in the array can be set, function returns an empty array;

- If all the name => value pairs in the array cannot be set, function returns &false;;

- If some can be set while others cannot, function returns an array with name=>value pair for which the addition failed in the user cache.

&reftitle.examples;

### `wincache_ucache_set` with `key` as a string

    <?php
    $bar = 'BAR';
    var_dump(wincache_ucache_set('foo', $bar));
    var_dump(wincache_ucache_get('foo'));
    $bar1 = 'BAR1';
    var_dump(wincache_ucache_set('foo', $bar1));
    var_dump(wincache_ucache_get('foo'));
    ?>

&example.outputs;

    bool(true)
    string(3) "BAR"
    bool(true)
    string(3) "BAR1"

### `wincache_ucache_set` with `key` as an array

    <?php
    $colors_array = array('green' => '5', 'Blue' => '6', 'yellow' => '7', 'cyan' => '8');
    var_dump(wincache_ucache_set($colors_array));
    var_dump(wincache_ucache_set($colors_array));
    var_dump(wincache_ucache_get('Blue'));
    ?>

&example.outputs;

    array(0) {}
    array(0) {}
    string(1) "6"

&reftitle.seealso;

- `wincache_ucache_add`
- `wincache_ucache_get`
- `wincache_ucache_delete`
- `wincache_ucache_clear`
- `wincache_ucache_exists`
- `wincache_ucache_meminfo`
- `wincache_ucache_info`
- __sleep()