Asks the server to kill a MySQL thread

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- PHP Manual
- mysqli
- 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

Warning

This function has been DEPRECATED as of PHP 8.4.0. Relying on this function is highly discouraged.

### Description

Object-oriented style

#[\Deprecated]
public mysqli::kill(int `$process_id`): bool

Procedural style

#[\Deprecated]
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.

### Changelog

Version | Description
--- | ---
8.4.0 | Both mysqli::kill() and mysqli_kill() are now deprecated. Use the `KILL` SQL command 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