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
mysqli::stat(): string
过程化风格
mysqli_stat() 函数返回一个表示系统状态信息的字符串， 字符串中的内容和 'mysqladmin status' 命令的输出结果类似， 包含以秒为单位的运行时间、运行中的线程数、问题数、重新加载数以及打开的表数量等信息。
返回值
成功则返回表示系统状态信息的字符串，失败则返回 false。
范例
示例 #1 mysqli::stat() 例程
面向对象风格
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* 检查连接 */
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
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* 检查连接 */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
printf("System status: %s\n", mysqli_stat($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
add a note
User Contributed Notes 1 note
amosjohlong at hotmail dot com ¶
5 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