mysql_thread_id
(PHP 4 >= 4.3.0, PHP 5, PECL mysql:1.0)
mysql_thread_id — Return the current thread ID
說明
int mysql_thread_id
([ resource $link_identifier
] )
Retrieves the current thread ID. If the connection is lost, and a reconnect with mysql_ping() is executed, the thread ID will change. This means only retrieve the thread ID when needed.
參數
- link_identifier
-
MySQL 的連接識別符。如果沒有指定,預設使用最後被 mysql_connect() 打開的連接。如果沒有找到該連接,函式會嘗試呼叫 mysql_connect() 建立連接並使用它。如果發生意外,沒有找到連接或無法建立連接,系統發出 E_WARNING 級別的警告信息。
Return值
The thread ID on success, or FALSE on failure.
範例
Example#1 mysql_thread_id() example
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$thread_id = mysql_thread_id($link);
if ($thread_id){
printf("current thread id is %d\n", $thread_id);
}
?>
上例的輸出類似於:
current thread id is 73