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関数・クラス解説

mysqlnd_qc_set_storage_handler

version:PECL mysqlnd_qc >= 1.0.0 (公式)

Change current storage handler

公式リファレンス

書式

mysqlnd_qc_set_storage_handler ( string $handler ) : bool

説明

Sets the storage handler used by the query cache. A list of available storage handler can be obtained from mysqlnd_qc_get_available_handlers(). Which storage are available depends on the compile time configuration of the query cache plugin. The default storage handler is always available. All other storage handler must be enabled explicitly when building the extension.

パラメータ

handler: Handler can be of type string representing the name of a built-in storage handler or an object of type mysqlnd_qc_handler_default. The names of the built-in storage handler are default, APC, MEMCACHE, sqlite.

返値

成功した場合に TRUE を、失敗した場合に FALSE を返します。 If changing the storage handler fails a catchable fatal error will be thrown. The query cache cannot operate if the previous storage handler has been shutdown but no new storage handler has been installed.

サンプル

例1 mysqlnd_qc_set_storage_handler() example
  The example shows the output from the built-in default storage handler. Other storage handler may report different data.  

var_dump(mysqlnd_qc_set_storage_handler("memcache"));

if (true === mysqlnd_qc_set_storage_handler("default"))
  printf("Default storage handler activated");

/* Catchable fatal error */
var_dump(mysqlnd_qc_set_storage_handler("unknown"));

 上の例の出力は以下となります。 
bool(true)
Default storage handler activated
Catchable fatal error: mysqlnd_qc_set_storage_handler(): Unknown handler 'unknown' in (file) on line (line)