mysqli::stat

mysqli_stat

(PHP 5, PHP 7, PHP 8)

mysqli::stat -- mysqli_stat — 获取当前系统状态信息

说明

面向对象风格

public mysqli::stat(): string|false

过程化风格

mysqli_stat(mysqli $mysql): string|false

mysqli_stat() 返回字符串，其中包含类似于“mysqladmin status”命令提供的信息。包含以秒为单位的正常运行时间、运行中的线程数、问题数、重新加载数以及打开的表数量。

参数

mysql: 仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的 mysqli 对象。

返回值

描述服务器状态的字符串，发生错误则为 false。

示例

示例 #1 mysqli::stat() 示例

面向对象风格

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

printf("System status: %s\n", $mysqli->stat());

过程化风格

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

printf("System status: %s\n", mysqli_stat($link));

以上示例会输出：

System status: Uptime: 272  Threads: 1  Questions: 5340  Slow queries: 0
Opens: 13  Flush tables: 1  Open tables: 0  Queries per second avg: 19.632
Memory in use: 8496K  Max memory used: 8560K

参见

mysqli_get_server_info() - 返回 MySQL 服务器的版本号

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amosjohlong at hotmail dot com ¶

8 years ago

Here is an explanation of the values that appear in connection->stat() returned string. It was taken from Ai Hua's April 29, 2006 answer on http://forums.mysql.com/read.php?12,86570,86570.

Uptime--The number of seconds the MySQL server has been running. 

Threads--The number of active threads (clients). 

Questions--The number of questions (queries) from clients since the server was started. 

Slow queries--The number of queries that have taken more than long_query_time seconds. 

Opens--The number of tables the server has opened. 

Flush tables--The number of flush-*, refresh, and reload commands the server has executed. 

Open tables--The number of tables that currently are open. 

Queries per second avg--Questions divided by Uptime