mysqlnd_uh_convert_to_mysqlnd

(PECL mysqlnd-uh >= 1.0.0-alpha)

mysqlnd_uh_convert_to_mysqlnd — Converts a MySQL connection handle into a mysqlnd connection handle

说明

resource mysqlnd_uh_convert_to_mysqlnd ( mysqli &$mysql_connection )

Converts a MySQL connection handle into a mysqlnd connection handle. After conversion you can execute mysqlnd library calls on the connection handle. This can be used to access mysqlnd functionality not made available through user space API calls.

The function can be disabled with mysqlnd_uh.enable . If mysqlnd_uh.enable is set to FALSE the function will not install the proxy and always return TRUE . Additionally, an error of the type E_WARNING may be emitted. The error message may read like PHP Warning: mysqlnd_uh_convert_to_mysqlnd(): (Mysqlnd User Handler) The plugin has been disabled by setting the configuration parameter mysqlnd_uh.enable = false. You are not allowed to call this function [...].

参数

MySQL connection handle: A MySQL connection handle of type mysql, mysqli or PDO_MySQL.

返回值

A mysqlnd connection handle.

更新日志

版本	说明
5.4.0	The `mysql_connection` parameter can now be of type mysql, PDO_MySQL, or mysqli. Before, only the mysqli type was allowed.

范例

Example #1 mysqlnd_uh_convert_to_mysqlnd() example

  <?php
 
 $mysql_connection  = new  PDO ( "mysql:host=localhost;dbname=test" ,  "root" ,  "" );

 
 $mysqlnd  =  mysqlnd_uh_convert_to_mysqlnd ( $mysql_connection );

 
 $obj  = new  MySQLndUHConnection ();
 
 var_dump ( $obj -> getThreadId ( $mysqlnd ));

 
 var_dump ( $mysql_connection -> query ( "SELECT CONNECTION_ID()" )-> fetchAll ());
 ?>

以上例程会输出：

int(27054)
array(1) {
  [0]=>
  array(2) {
    ["CONNECTION_ID()"]=>
    string(5) "27054"
    [0]=>
    string(5) "27054"
  }
}

参见

mysqlnd_uh.enable