Asks the server to kill a MySQL thread

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- PHP Manual
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- Asks the server to kill a MySQL thread

# mysqli::kill

# mysqli_kill

(PHP 5, PHP 7, PHP 8)

mysqli::kill -- mysqli_kill — Asks the server to kill a MySQL thread

### Description

Object-oriented style

public mysqli::kill(int `$process_id`): bool

Procedural style

mysqli_kill(mysqli `$mysql`, int `$process_id`): bool

This function is used to ask the server to kill a MySQL thread specified by the `process_id` parameter. This value must be retrieved by calling the mysqli_thread_id() function.

To stop a running query you should use the SQL command `KILL QUERY processid`.

### Parameters

`mysql`

  Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()

### Return Values

Returns `true` on success or `false` on failure.

### Errors/Exceptions

If mysqli error reporting is enabled (`MYSQLI_REPORT_ERROR`) and the requested operation fails, a warning is generated. If, in addition, the mode is set to `MYSQLI_REPORT_STRICT`, a mysqli_sql_exception is thrown instead.

### Examples

Example #1 mysqli::kill() 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

### See Also

- mysqli_thread_id() - Returns the thread ID for the current connection