PHP 7.2.0 Release Candidate 4 Released

mysqli::stat

mysqli_stat

(PHP 5, PHP 7)

mysqli::stat -- mysqli_statGets the current system status

说明

面向对象风格

string mysqli::stat ( void )

过程化风格

string mysqli_stat ( mysqli $link )

mysqli_stat() returns a string containing information similar to that provided by the 'mysqladmin status' command. This includes uptime in seconds and the number of running threads, questions, reloads, and open tables.

参数

link

仅以过程化样式:由mysqli_connect()mysqli_init() 返回的链接标识。

返回值

A string describing the server status. FALSE if an error occurred.

范例

Example #1 mysqli::stat() example

面向对象风格

<?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();
}

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

$mysqli->close();
?>

过程化风格

<?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();
}

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

mysqli_close($link);
?>

以上例程会输出:

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

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User Contributed Notes 1 note

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amosjohlong at hotmail dot com
10 months 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
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