MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::$thread_id
mysqli_thread_id
Returns the thread ID for the current connection
Object oriented style
int mysqli->thread_id ;
Procedural style
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.
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
.
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
Returns the Thread ID for the current connection.
Example 3.67 $mysqli->thread_id
example
Object oriented style
<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* determine our thread id */ $thread_id = $mysqli->thread_id; /* Kill connection */ $mysqli->kill($thread_id); /* This should produce an error */ if (!$mysqli->query("CREATE TABLE myCity LIKE City")) { printf("Error: %s\n", $mysqli->error); exit; } /* close connection */ $mysqli->close(); ?>
Procedural style
<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* determine our thread id */ $thread_id = mysqli_thread_id($link); /* Kill connection */ mysqli_kill($link, $thread_id); /* This should produce an error */ if (!mysqli_query($link, "CREATE TABLE myCity LIKE City")) { printf("Error: %s\n", mysqli_error($link)); exit; } /* close connection */ mysqli_close($link); ?>
The above examples will output:
Error: MySQL server has gone away
mysqli_kill
|