mysqlnd_qc_set_storage_handler
(PECL mysqlnd_qc >= 1.0.0)
mysqlnd_qc_set_storage_handler — Change current storage handler
説明
$handler
) : bool
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 aredefault,APC,MEMCACHE,sqlite.
返り値
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.
例
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.
<?php
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)
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