mysqli::$thread_id

mysqli_thread_id

(PHP 5)

mysqli::$thread_id -- mysqli_thread_id — Returns the thread ID for the current connection

说明

面向对象风格

int $mysqli->thread_id ;

过程化风格

int mysqli_thread_id ( mysqli $link )

The mysqli_thread_id() function returns the thread ID for the current connection which can then be killed using the mysqli_kill() function. If the connection is lost and you reconnect with mysqli_ping() , the thread ID will be other. Therefore you should get the thread ID only when you need it.

Note:

The thread ID is assigned on a connection-by-connection basis. Hence, if the connection is broken and then re-established a new thread ID will be assigned.

To kill a running query you can use the SQL command KILL QUERY processid.

参数

link: 仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的链接标识。

返回值

Returns the Thread ID for the current connection.

范例

Example #1 $mysqli->thread_id example

面向对象风格

  <?php
$mysqli  = new  mysqli ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );

 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}

 
 $thread_id  =  $mysqli -> thread_id ;

 
 $mysqli -> kill ( $thread_id );

 
 if (! $mysqli -> query ( "CREATE TABLE myCity LIKE City" )) {
     printf ( "Error: %s\n" ,  $mysqli -> error );
    exit;
}

 
 $mysqli -> close ();
 ?>

过程化风格

  <?php
$link  =  mysqli_connect ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );

 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}

 
 $thread_id  =  mysqli_thread_id ( $link );

 
 mysqli_kill ( $link ,  $thread_id );

 
 if (! mysqli_query ( $link ,  "CREATE TABLE myCity LIKE City" )) {
     printf ( "Error: %s\n" ,  mysqli_error ( $link ));
    exit;
}

 
 mysqli_close ( $link );
 ?>

以上例程会输出：

Error: MySQL server has gone away

参见

mysqli_kill() - Asks the server to kill a MySQL thread